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WØDBW - Christian Amateur Radio Operator
Derek Winterstien / Nebraska


Current Events

UPDATE: 19:54 Sunday, January 08, 2017 KE5HSA was asking me about mounting a dual band antenna to a Jeep Wrangler. What I used I purchased from eBay. See Links:

This seller offers both a drivers side and passenger side mount. I prefer the drivers side so that the ham antenna is not in close proximity to the broadcast radio antenna. However, the seller does offer a passenger side mount as an option. You could go all hard core ham and stick one on both sides!

UPDATE: 12:37 AM Wednesday, January 04, 2017 Happy New Year! Today I updated the landing page for the web site at and also the email system is now functional including the ability to send messages to gmail users.

UPDATE: 6:59 AM Friday, September 02, 2016 I've owned a D-Star radio for nearly a year now and never taken the time to try out the D-Star digital mode. The first step is registration of my ham callsign which gives me access to the D-Star network.

This is similar to the DMR DMARC registration with the exception that D-Star does not use the unique ID number, it is based entirely on the callsign, which makes sense since it too had to be unique. I am not a big fan on the digital modes, there are too many of them and none are completely open, as they should be.

UPDATE: 11:18 PM Saturday, August 27, 2016 The Hawaii QSO Party was taking place today, and there was much ado about a female operator on 14.228MHz. Conversations on a couple local repeaters involved who was able to get though the pileup on 20-meter to make contact with "Ann." I had to give it a go. Using my humble NVIS fence antenna which I made primarily for 80-meter I tuned it to 20 and starting putting out my call sign. It took about 20 minutes of trying and waiting my turn to achieve a successful QSO with kh6w in Hawaii. She was using a club / contest call which I may not have copied correctly: kh6lhn. I asked for her own call sign which I can now add to my log.

kh6w	Ann	hawaii		10:51 PM Saturday, August 27, 2016	14.228

UPDATE: Thursday, August 11, 2016 My 220 promote the band activity includes the creation of 3 new wiki pages...

UPDATE: Saturday, July 23, 2016 I have been very patient with NPPD (Nebraska Public Power District) on trying to get them to correct the high levels of RFI coming from the power lines in the alleyway behind my residence. The poles are not properly grounded, and their own contracted engineer advised them to correct the problem. Instead of going to work on the problem, the area supervisor "Mick" insists that grounding the poles is too expensive and that all the RFI is coming from the US Post Office 5 blocks away. He even denied what their own engineer had determined to be the problem. Do you think maybe it is time to contact the FCC?

NPPD - Noise Pollution & Powerful Discharges

Updates to the Plattsmouth ARC Web Site! - Visit and see whats new on our club web site.

UPDATE: Wednesday, June 29, 2016 You can see our Plattsmouth Amateur Radio Club Field Day results:

  • - Plattsmouth Amateur Radio Club web site.

UPDATE: Archived and Compressed older posts...

UPDATE: Saturday, June 18, 2016

Rich WA0ZQG announced 2m Simplex Freq cleared for field day use.

UPDATE: Monday, June 13, 2016


Field Day is June 25 - 26, and the Plattsmouth Amateur...

UPDATE: Tuesday, May 31, 2016

Have you been listening to the PL tone debate on the 146.820 repeater? Don't be confused by what you are hearing. Read my memo on how a simple PL tone can benefit SWIARC repeater users without denying those without a tone board access to the repeater.

SHORT MEMO: W0DBW- Disambiguation on Repeater Tone Encoded Squelch and How PL Can Benefit SWIARC

If you understand CTCSS, then you will see the benefit in what I am suggesting.

UPDATE: Saturday, May 28, 2016

According to the FCC [...] approval of my new vanity callsign which I will now be using, w0dbw. The vanity callsign uses my initials ...

UPDATE: Wednesday, May 25, 2016

Recently I purchased a second TYT TH-9800 not because [...] However, the radio was not as described. See my youtube video: Caveat Emptor!

May 15, 2016 - The TH-9000D is an FM 65W 1.25-Meter radio. WB0YLA is a repeater in Omaha on the band. 224.760 Mhz, -1600 offset, 146.2 PL. Open repeater located at 156th & Maple.

April 18, 2016 - Installed Ringo antenna on top of the tower. Onthetower416sm.jpg
Yeah, that's me wearing my ANSI Z359.1-2007, OSHA 1926.502 compliant safety gear

March 18, 2016 - I put the 70cm Yaga beam up on the tower today. Now it is much easier to hit the Omaha UHF repeaters.

SWIARC is testing digital mode on their .82 repeater [...] Signal strength for me when from a 6+ down to 2 on the S-meter. It will be interesting [...]

When I was transmitting on my old Kenwood TR-7400A today, using an omi on the roof several feet from the UHF yagi which is up on the tower, the Kenwood on full power wiped out the front-end on the UHF rig I was using, causing it to go nutty and shut itself off. It seemed to come out of it after being reset. I was a bit worried that it was toast. Reflected signal is low coming in the cable on the Kenwood, however, there is a lot of RF in the shack on full power transmit. The radio itself is a strong emitter of RF coming out of the case, more so than the newer radios. I am going to start setting my coffee cup on the Kenwood when I use it, so the stray RF keeps the coffee warm.

I have been studying and experimenting more with cross-band repeat[...]. Updates to how it works and what is permissible by the FCC can be read on the wiki page about Ham Radio Cross Band Repeater. Maybe I will discuss [...].

In my area our local ham group, the Plattsmouth Amateur Radio Club, we have been experimenting with DMR and SDR. The club president, KB0OGO, did a demonstration of SDR with his new SDRplay receiver. KI0PY has demonstrated MotoTRBO with a Motorola branded HT while I have recently obtained the Tytera MD-380.

I've been building antennas, with my most recent endeavor to build a 6-meter "squalo" horizontally polarized antenna. There is a local 6-meter [...].

About Me

Renewed my interest in radio after over two decades in absentia, I worked my first DX contact in 1988. I currently hold a General class license and will pursue obtaining the Extra as time permits, which I plan to achieve eventually. I have been working with Part 90 radios as part of my business for several years, which was another motivating factor in my decision to go "full ham." I would like to get a vanity so that my callsign is shorter and less cumbersome for others to remember.

My wife will be taking the Tech exam this summer so that she can enter into the hobby. If she is going to be exposed to RF radiation here at the house she might as well have a license too. I have two children, the oldest boy is 9 and he shows a lot of interest in radio. He wants to be a ham operator, however, he also wants to be Iron Man Tony Stark. My daughter likes to sit next to me when I DX. Her favorite is the Australian broadcast on 9.58. That's my favorite too, reminds me of when I lived in Brisbane.

Memo: Proposal (Please Read)

This memo is something I plan to present to the leadership of local amateur radio clubs in my area. Please read and if you agree, consider printing it and presenting it your own local ARC.

Proposal to Create an Amateur Net for New Licensees

Update: There is interest in the concept. Discussion is taking place to locate volunteers and select a time and repeater frequency.

About the Novice Net and details and the progress of implementation please see: SW Iowa and Eastern Nebraska Go Net

The name "Tech Net" has been abandoned for the purpose of disambiguation. It is not a technical discussion net. It is a net for those newly licensed to receive an inviting and warm introduction to the hobby.

Recent Equipment Photographs


Ke0etz icom2820h-640.jpg


Transceivers I have collected and used over the years are listed here. I am trying to locate the ones I stored away. Since I have renewed my interest in radio communication after many years (late 80s early 90s) I have started buying here and there again.

Presenting some of my transceivers...

Kenwood TS-940SAT

Kenwood TS-940SAT - A Solid State Competition Grade HF Transceiver. Solid state HF transceiver, radio bands from 160 to 10 meters, general coverage receiver from 150 kHz to 30 MHz, CW, SSB, AM, FSK, and narrow-band FM. 100 Watt out. The S model has no auto tuner, while my SAT has the auto tuner.

This radio was the KING OF HF back in the 1980s and 1990s! It is certainly the KING OF HEAVY. I think it weights around 50-lbs. I can "hear" HF contacts with this radio that I cannot with any of my other HF rigs; it has very sensitive ears.

The auto-tuner does things people won't believe. In a pinch I connected 300 ohm flat to a PL-259 without a balun and directly into the TS-940, on a random length asymmetrical doublet. Not only did the auto-tuner match it to the radio, I could work an 80-meter contact! Warning: do not connect an antenna this way. Like I said, it was "in a pinch," and this is not my working antenna.


The nice thing about this radio is "no menus." Everything is controlled by manual controls on the face. It needed some attention when it came to me. I have corrected some problems with it including the well known PLL lock problem, the sub display not working, and a problem with the auto tuner. I think it is ready for use.


TIP: If you own one of these I recommend connecting both fans in the rear directly to DC power from the contact ahead of the AVR board so that the fans come on and run full time when the radio is on. The temperature sensors that are supposed to turn the fan protecting the finals on is not reliable. I replaced the original fans both with quiet running PC fans and they run whenever the radio is powerd on.

Alinco DX-70T

  • Alinco DX-70T HF/6m Tranceiver - Working. This transceiver will cover 160 meters - 10 meters and 6 meters. SSB, CW, FM 1.8MHz-30MHz 100 Watts; 50MHz-54MHz: 10 Watts (AM) 1.8 MHz - 30 MHz 40 Watts; 5OMHz - 54 MHz: 4 Watts.

Alinco DX70T 320.jpg

Yaesu FT-847

  • Yaesu FT-847 HF, VHF, UHF All Mode Transceiver. Those marketing people at Yaesu call it The Yaesu FT-847 Earth Station. Here's a stock photo:


I need a DTMF microphone for it. When i got this radio it needed some small fixes. It is a pretty good radio although it lacks some features that will ultimately cause me to replace it with something more capable. I wish it had a true cross-band repeat. It will only cross-band retransmit. Furthermore, it does not have a built in SWR meter or reverse power meter. It only has a "high SWR indicator." It needs more memory channels too.

This radio has excellent digital signal processing built in. Also, it has a built in RF Amp for receive amplification which also works very well. I use a combination of the DSP and notch filter when i work HF so I can hear weak contacts.

Icom IC-2820H

This is my absolute best 2m/440 mobile transceiver! Icom makes quality radios.

Icom IC-2820H.jpg
stock photo

TYT TH-9800

  • TYT TH-9800 Quad Band Transceiver. This radio does cover 10-meter but not with SSB so I didn't list it up there. It is strictly AM-FM mode. It is a Chinese knockoff of Yaseau. I got it for under $200 new. looks like:

TYT TH-9800.jpg
stock photo

The above is a stock image. I will snap a pic of it as it is hooked up in my Jeep. It was in my service van, however, I moved it to the Jeep recently. It is on an Opek Quad band antenna.

Kenwood TR-7400A

  • Kenwood TR-7400A - My old VHF mobile rig. I dug this out of storage but can't find where I put the microphone.

Kenwood TR-7400A300px.jpg

Actual pic: I hooked this up to a VHF HT antenna and a 12v PSU to see if it still worked. Even if I had the mic I wouldn't key down on this type of antenna. I was picking up conversation from a couple local repeaters. Sounded good. When I find the mic I will hook it up in my van and see if it still transmits well enough.

QYT KT-8900

  • QYT KT-8900 dual band 20W MINI Moblie radio. This is a noisy little rig that I put in the wife's car. I wouldn't recommend this radio to anyone.

Zastone qyt kt-9800-a.jpg

Kenwood TK 880H

Kenwood TK 880H - This is a Part 90 radio which retails with the following feature list: 32 systems / 250 groups (trunked mode), Max 600 channels (trunked mode), Max 250 channels capacity (conventional mode), 12 character dot matririx LCD, 10 character alphanumeric alias. This radio can be programmed for use on Ham bands. Programming is done with KPG-49D software. It is supposed to be 50 watts and programmable for use between 400 to 430 mhz. With a dummy load I tested it at about 30 watts. Requires a serial cable to program, serial on one end, RJ45 on the other.

Clear Channel Ranger AR-3500

  • Clear Channel Ranger AR-3500 - In storage. Hand-me-down from a family member. I like my President HR2510 better although this AR3500 is the 100 watt model so it is more powerful. It does have power! This radio is in unknown condition. I haven't powered it up in over 20 years.

Uniden President HR2510

  • Uniden President HR2510 - Working however since it hasn't been used much in a couple decades I think it is a bit out of tune. The SWR meter on it never seemed to work well. I used to thump the signal display to get it to register. I have worked this radio a lot and made many contacts. In 1990 I was able to make regular contacts in the UK. Used with the Hy Gain Penetrator antenna, which has to be shorted a bit for 10-meter operation, and during the right solar activity, this radio is great for making long distant contacts on HF band. Here is what it looks like:


When I get this back on a good antenna I plan to make some contacts before this sunspot cycle dries up.

Yaesu Sommerkamp FT-7B

  • Yaesu Sommerkamp FT-7B - This was also a hand-me-down from a family member. It once worked, but now doesn't seem to put out any power, low output problem. I plan to take it apart and start with a good cleaning, then go from there.

Tytera MD-380


I have been testing the water on DMR with the Tytera MD-380 which is MotoTRBO compatible. DMR is Digital 2-Way Radio. If you're interested in DMR take a look at Using DMR which is a guide to get you started.

Vintage Hallicrafters Station Complete

Complete Station Matched Set: Hallicrafters HT-39 Transmitter, HT-111 Receiver, R-48 Speaker, and Microphone.


  • Hallicrafters Model SX-111 Multiband Receiver

Ham band only receiver covering the 10m, 15m, 20m, 40, and 80m bands plus 10 MHz WWV.

IF frequencies of 50.75 kHz and 1.65 MHz. Variable selectivity from 500 Hz to 5 kHz, notch filter, ANL, BFO with product detector, 100 kHz calibrator and S-meter.

Tubes used: 5Y3 rectifier, OA2 voltage regulator, 6AQ5 audio output, 12AX7 audio amp. & BFO, 6BJ7 AGC, detector & ANL, 6BY6 product detector, 6BA6 2nd. mixer, 12AT7 2nd. conversion oscillator, two 6DC6 as 2nd. & 1st. IF, 6BY6 mixer, 6C4 1st. conversion oscillator, 6DC6 RF amplifier and 6AU6 crystal calibrator.

  • Hallicrafters Model HT-37 Amateur Transmitter

Production of this unit began in 1960. Hallicrafters HT-37 amateur transmitter covers 80, 40, 20, 15 and 10 meters in AM(DSB), CW and SSB modes. Power is 70-100 watts input SSB PEP/CW.

The finals are a pair of 6146 tubes.

This radio features a built in power supply and operates from 120 VAC. 18.25 x 9.5 x 16.75 inches 80 lbs

The VFO employs double reduction disc drive, fixed T.C. Sideband suppression is 40 db at 1000 CPS. Power rating is 70-100 watts P.E.P. output CW or SSB. 17-25 watts carrier on AM phone. There are two 6146s in the final. 3rd and 5th order distortion products down 30 db. Carrier suppression is 40 db or better. CAL system has instant CW CAL signal from any transmission mode. Cooling is by convection with final operated at low dissipation in standby.

The Hallicrafters HT-37 is the matching unit for the Hallicrafters SX-111 receiver and the Hallicrafters R-48 speaker.

  • Hallicrafters Model R-48 Speaker

Antenna Systems

Tower and Antenna Configuration

I have a Rohn BX40 tower. I would like to eventually go higher. Right now, the BX40 will have to suffice.

It is a free standing tower anchored to a concrete slab. The depth of the slab is below the frost line. Two of the 3 tower legs are grounded to 8ft 1/2" buried copper pipe. (see antenna descriptions below picture)


  • Ringo Ranger: this is a 2m omnidirectional monoband antenna. Base starts at 45ft.
  • Ed Fong: Dr. Ed Fong's (WB6IQN) design, Edison Fong DB-1 Antenna. I built this following his design specification
  • discone: This generic discone I picked up at a hamfest and use with the scanner and SDR receiver
  • 5GHz: network link between properties
  • DTTV: UHF digital terrestrial television
  • inverted V dipole: HF wire dipole fed by 450-Ohm balanced line for 20-80 meter HF
  • doublet for 80/160M HF: 120ft doublet fed by 300-Ohm balanced line for 80-160 meter HF
  • 70cm beam: 6 element yagi, N connector, used primarily for DMR/MotoTRBO
  • 6-Meter Dipole: built out of steel conduit, use with 4:1 balun
  • 1.25m Yagi Beam: Cushcraft A224WB 220 MHZ pointed towards the WB0YLA 224.76 repeater in Omaha

also mounted on or near the house:

  • 70cm ground plane: general 440 operation
  • 2m ground plane: experimental
  • Comtelco BS450XL3: UHF 2-way
  • 10-meter convertible wire dipole: disassembled, was on the Chimney.

10-meter convertible wire dipole

  • homebrew

This is a wire antenna I built. There is a 1:1 balun to which LMR-400 is attached and goes into the shack. The antenna is nearly an inverted V, however, I say it is less inverted than a traditional inverted V. A true inverted V tends to be omni directional. Now the truth of that has relevance to proximity to the ground (must be less than 1/4 wavelength) and band. 10-meter is high enough in frequency you do not want to treat it like you would one of the lower HF bands.

The 10-meter dipole I am using has about a 30 degree angle downward. The length of each side is 94" giving a total dipole length of 15' 8" long. At this length the antenna is resonate on the SSB voice portion of the 10-meter band towards the bottom. Although it is perfectly resonate, I still use the auto-tuning function on my HF radio to protect the finals. According to a hamuniverse article a dipole at 10-meter should be about 16½' long. Mine is shorter, however, the antenna analyzer allowed me to accurately trim it down to resonance and it is a match straight to the transceiver.

Each end of the antenna has a connector so that I may attach extra length to the antenna. I can, for example, attach sufficient length bringing the total dipole length to around 32' - 33' so that I may work 10m - 20m matching ham bands in-between with the tuner. Of course, the more inductor loading required, the less efficient the antenna is. However, on 20m the antenna is again resonate without the tuner.

  • Attach 154" 107" of additional length to each side of the 10-meter dipole for the 20-meter band.
188" total length on my 10-meter (15' 8")
94"    per side
7' 10" per side
402" total length on a 20-meter inverted-V (33' 6")
201"   per side
16' 9" per side

201 - 94 = 107" of additional length needed for conversion to 20m
           8' 11"

756" total length on a 40-meter inverted-V (63')
378"   per side
31' 5" per side
378 - 94 = 284" of additional length needed for conversion to 40m
           23' 8"

To 80-meter a lot more length is required. This begins to be a challenge on my urban located property lot. I can build long HF antennas that run North - South. I have a long narrow lot. However, the 10-meter convertible dipole on my roof runs East - West. If my neighbor is not home I can go the extra length to work 80-meter on this antenna. I would not try to use this particular antenna for the 80-meter band.

Notes on Length: On my 40-meter tests using the lengths in the table above 1:1 resonance was right at 7.0 MHz. I shall shorten the antenna and try to match 1:1 at 7.2 MHz.

6-Meter Steel Dipole

  • homebrew

I used ½" steel conduit for the poles instead of copper since the steel is more rigid and holds shape better as well as endures the elements better. The first version of this antenna I have used to work the local 6-meter net.


Some Local Nets



These nets I have either monitored, to verify, or checked in. Current as of: July 2016

The physical location of the repeater does not have to be in EN21, however, the repeater must be accessible using ordinary means by a ham operator from within the EN21 area.

70cm Nets

  • (444.325+)(FM).. [------S] Saturday 7:00pm, Heartland Hams Saturday Tech Net, Informal, casual chat and technical assistance oriented.
    Glenwood tech net has been moved to N0WKF 2m repeater; same time and day.

  • (443.450+)(FM).. [----T-S] CW Practice Net, Wait for code freq announcement and correspond during practice. Informal. Open.

1.25m Nets

  • (224.760-)(FM).. [-MTWTF-] Weeknights 9:00pm, 220 Ghost Net, Informal, casual chat.
  • (224.760-)(FM).. [-----F-] Friday 10:00pm, 220 Promote the Band Net, Informal, casual chat and 1.25cm related discussion

2m Nets

  • (145.130+)(FM).. [S------] Sunday 8:00pm, Harrison Co ARES, Formal, announcements, checkins, chat.
  • (146.940+)(FM).. [S------] Sunday 9:00pm, Douglas County ARES Net, Formal, announcements and checkins only. (147.36+ backup)
  • (144.250)(SSB).. [S------] Sunday 8:00pm, 2M SSB Net, Informal, Casual, Open Chat. W0AF moderated.
  • (145.290-)(FM).. [-M-----] Monday 7:00pm, Heartland Hams, Formal, announcements and chat.
  • (145.130-)(FM).. [-M-----] Monday 7:30pm, Boyer Valley Monday Evening net, ??????, chat. kc0sum net control.
  • (146.940+)(FM).. [-M-----] Monday 9:00pm, SWIARC Info Net, Casual, Predetermined Subject. Chat.
  • (146.820-)(FM).. [--T----] Tuesday 9:00pm, Prepper’s and Survivalism Information Net, Casual, Predetermined Subject. Chat. KE0LOL net control.
  • (147.390+)(FM).. [---W---] Wednesday 8:00pm, Scout Chat Net, Casual, To promote radio scouting. KD0NMD net control.
  • (146.820-)(FM).. [---W---] Wednesday 9:00pm, SWIARC, Casual, Open Chat.
  • (145.130+)(FM).. [----T--] Thursday 8:30pm (!), Boyer Valley Tech net, Formal, tech chat.
  • (146.820-)(FM).. [-----F-] Friday 9:30pm, This Week in Ham Radio, informal, round table chat, early checkins at 9pm.
  • (146.820-)(FM).. [------S] Saturday 12:00pm, SWIARC, Casual, SWIARC Saturday Noon Swap Net.
  • (145.290-)(FM).. [------S] Saturday 7:00pm, Heartland Hams Saturday Tech Net, Informal, casual chat and technical assistance oriented.

(!) indicates a conflict with a previously established net

10m Nets

  • (28.350)(SSB).. [----T--] Thursday at 8:00pm. VERIFIED, Casual, wb0gbi, Mitch as net control, Chat.

40m Nets

  • (7282)(SSB).. [-MTWTFS] Daily at 1:00pm. Nebraska 40 Meter SSB Net, verified, open, weather, etc.

80m Nets

  • (3970)(SSB).. [.MTWTF.] Weekdays at 6:45am, Eye Bank Net, verified, rollcall, weather and brief QSOs, Iowa, Neb, Kansas, etc.
  • (3982)(SSB).. [-MTWTFS] Daily at 7:30am, Nebraska Morning Phone Net, verified, rollcall, weather reports from across the area and announcements.
  • (3950)(SSB).. [-MTWTFS] MTWTFS at 8:00am, West Nebraska Net, verified, rollcall
  • (3977)(SSB).. [------S] Saturday at 8:00am, Unnamed Vintage Radio Net, verified, discussion vintage transceivers, anyone welcome.
  • (3982)(SSB).. [------S] Saturday at 8:30am, QCWA Net Omaha Chap 25, verified, Quarter Century Wireless Association.
  • (3982)(SSB).. [-MTWTFS] Daily at 12:30pm, Nebraska Cornhusker Net, verified, open, weather, etc.
  • (3982)(SSB).. [SMTWTFS] Daily at 6:30pm, Nebraska Storm Net, verified, rollcall, weather, etc.
  • (3897)(SSB).. [S------] Sunday at 7:15am, 3900 Club, Early Social Net, open to everyone
  • (3897)(SSB).. [S------] Sunday at 7:45am, 3900 Club Sunday Trader's Net Classifieds, open to everyone

160m Nets

  • (1995)(SSB).. [SMTWTFS]</tt> Daily at 8:00pm, (updated for DST) Nebraska Weather Net, verified, rollcall, weather, etc.
    this net resumes again in the fall season.




unknown nets

  • 147.360 ..... 7:30pm Sunday . K0BOY Iowa Echolink net, mostly Iowa repeaters. reported: Sunday, July 17, 2016 . To verify this net has to be received 4x since reported. [no] verify repeater [na] verify occurrence : report: This was not K0BOY. It was a repeater in Lamoni Iowa received VHF propagation. repeater group linked via echolink has a Sunday 7:30pm net [.][.][.][.][.]
  • 146.790 ..... (PL:136.5) Sunday at 8:30pm . Rollcall style net . [ N0FHQ ] AA0OS, AC0BU, WU0E, W0JW, WB0WKQ, W0SMS, N0BKB, N0JMH, N0ORU, N0VPR, N0DRT, K0RDE, K0YKC, K0MHJ, KC0DUA, KC0MFW, KE0TWE, KC0TTO, K0FFX, KB0TUX, K0VFK, K0WRQ, K0DQQ, K?0UFO, K1SLR, KN0WNE, N0JAR, K0IAY, KE0CBE, W0WHH, N0TJA, KD0DK, WU0E [x][.][.][.][.]
  • 3.916 ..... 9:00pm Friday . trivia . unknown location


Local Repeaters

The first link is a google docs spreadsheet with all of the local repeaters near the EN21 Grid Square Map. These are repeaters that cover Omaha, Bellevue, Plattsmouth, and Council Bluffs.... Nebraska and Iowa.

Currently 2m and 70cm only:

last updated: Sunday, April 17, 2016

The following is a repeater list obtained from an online source. It may be out of date.


extended range repeaters

Some repeaters that can be used when propagation permits.

note: These are not part of the official repeater list that I maintain for the two ham radio clubs. What has been added below is simply part of my notes on repeaters of interest typically after I have made a contact during a band opening.

  • 147.195 K0SIL Lincoln NE - useful to check VHF conditions.
  • 146.790 K0CSQ Creston Iowa PL:136.5 - useful to check VHF conditions. about 100 mi. - see:
  • 442.400 Arispe Iowa PL:151.4
  • 147.360 Lamoni Iowa PL:???
  • 145.265 - (7/30/16) ??? PL:none - seems to be a fusion/analog repeater supporting wiresx. Could be KD0PGV
  • 146.745 - (9/30/16) K0BVC PL:136.5 - Good Morning w/Radio IRLP Net Mon-Sat at 9 AM.



  _ __ ___   ___  _ __   ___ _   _ 
 | '_ ` _ \ / _ \| '_ \ / _ \ | | |
 | | | | | | (_) | | | |  __/ |_| |
 |_| |_| |_|\___/|_| |_|\___|\__, |

For Sale

w0dbw		Derek		MFJ-921 Antenna tuner 2m and 1.25m "black" for $72
w0dbw		Derek		Icom IC-745 $355 OBO
w0dbw		Derek		MFJ-267 Dummy Load/Watt Meter up to 1500 watts $145
w0dbw		Derek		Dentron antenna tuner JR Monitor coax balanced and long wire $89.
w0dbw		Derek		KENWOOD TK-880H part 90 radio. 40 to 50W output on UHF. $125 OBO, MFJ-921 Antenna tuner 2m 
				and 1.25m. $78 OBO

				call or txt (402) 403-9662

See all my listings and other classifieds: SWIARC Saturday Noon Swap Net

Sun Spots


Sunspot numbers wax and wane in an approximately 11-year cycle. Solar Cycle 1 spanned the years 1755 to 1766. The last, Cycle 23, peaked in April 2000 with an average of 120 sunspots per day around the time of maximum. The last minimum part of the cycle bottomed out in December 2008, was the longest and quietest in over a century. Cycle 24 is occurring now in 1014 - 1015. Cycle 24 is a disappointing cycle. 10-meter DX depends largely on solar activity. Skip on 10-meter is active now and predicted to remain active until 2018 or shortly thereafter. It is a weak sunspot cycle, however, it is enough to provide for skip.

Cycle 24 actually peaked in 2014.


We need more sunspots! Join my campaign to lobby Washington to pass a bill that creates sunspots. Click HERE to send us your donation.

Sun Spots and band conditions

Take a look at the SFU (Solar Flux Units) which is a number from calculation of the number of physical sun spots, their size, and other facts involving how the sun interacts with our atmosphere.

The Alpha (Ap) index and Kilo (Kp) index help you determine if there is a solar storm or other geomagnetic activity that can have a negative impact on communication. Ap is an average and Kp is immediate. If this number is higher than 3 then there is a lot of geomagnetic activity such as a geomagnetic storm that will negatively impact propagation.

It is best to have a high SFU (starting at about 100) and low values for Ap and Kp (below 3).

SFI index: Solar Flux Index ; it is a gauge of how much solar particles and magnetic fields reaching our atmosphere. The higher the number, the better HF propagation should be. Below a value of 70 propagation is miserable.

SN: Sunspot Numbers: This value is the visible number of spots on the Sun’s surface. Solar flux (SFI) and Sun spots (SN) numbers need to be high AND sustained to make a major impact on propagation.

The A Index: It’s simply an index of geomagnetic activity derived from a scaled average of the previous 24 hours K-index readings. Values below 5 are great and above 9 are miserable.

The K-Index: A gauge of geomagnetic activity relative to an assumed quiet-day. Falling numbers mean improving conditions and better propagation particularly in northern latitudes.



  • 6m : sporadic, mostly daytime.


  • 10m : evening propagation and daytime mostly and during high sunspot period of solar cycle.
  • 12 - 17m : daytime bands, usually opened.
  • 20m : Can be opened day or night. This is a reliable band for DX.
  • 40m : local skip during the day, DX at night.
  • 80m : local skip during the day, longer distance DX at night.


  • 160m : night propagation. local skip.

Hy Gain Penetrator

The Hy Gain Penetrator antenna designer Howell Pabian is now retired in the Lincoln, Nebraska! That's where I ordered my antennas from. A little 2-way radio shop that once existed on O Street.

Hy Gain Penetrator Facts:

  • 5/8 wave ground plane antenna.
  • operate on 10 and 12 meter without a tuner
  • operate on 20 meter using only the internal tuner in most rigs (tested and verified) - WD0CFC has successfully made DX contacts on 20-meter using an Icom ic-746 pro w the internal tuner. Antenna easily matches on 20m and transmits with low SWR.


MFJ now owns the rights to Hy Gain in name. lb

A new version of the antenna is back in production.


When I had only a tech license I would use CW as a way to make very basic contact mostly I would just use it as a means to test HF radios I happened to be working on.

In late 2016 I decided to make a serious effort to learn cw. The goal is to be proficient enough to work cw in the coming 2017 field day.

It is very easy to memorize each letter. It is simple to slow key out single words and callsigns. The trick is to be able to copy. Even better is to be able to copy without writing down each letter as it comes in.

Suggested Learning Tools (thank you N0GR)

...add spacing between the letters -- the Farnsworth method...


The 40/80/160 Meter Coil-loaded Inverted V Dipole Antenna


  • The amount of space that you do need is about the same amount required for an 80 meter inverted V antenna
  • Coil-loaded inverted V dipole antenna is a resonate antenna that does not require the use of an antenna tuner. It will work all of the 40 meter band plus a portion of the 80 and 160 meter bands. An antenna tuner can of course be used to increase bandwidth.

40-80-160 v 3.jpg

Backpack Transceivers

Something delux:

  • The Yaesu FT-817ND is a new deluxe version of the hugely popular FT-817.
  • YAESU FT-818 QRP Transceiver – the next generation of FT-817

Something cheap for repeater work:

Something nostalgic:

Cushcraft ARX450B Ringo Ranger II

The Cushcraft ARX450B Ringo Ranger II has more gain, less wind load and more mechanical integrity than other 70 cm meter antennas. Based on the original W1BX Ringo, the Ringo Ranger II is the latest design featuring three 5/8 wave radiating elements and an adjustable 1/8 wave phasing stub. The result is very low angle of radiation over your coverage area.

Downeast Microwave DEM 222-28CK

This is a transverter to use your 10-meter all mode transceiver on the 1.25m band.

Icom IC-9100

Base Amateur HF/VHF/UHF Transceiver
Frequency range 10-160 m + WARC / 6 m / 2m / 70cm
23cm + D-Star optional, Requires 13.8 VDC at 24 amps. 12.5 x 4.6 x 13.5 inches 24.3 lbs.

  • used value: $1,800.00 - $2,025.00
  • new value: $2480.00
  • built in SWR?


  • MFJ-1025
  • MFJ-1026
  • ANC-F

Equipment: Connect Systems CS750 DMR Digital/Analog Radio

Digital Mobile Radio (DMR) - The new CS750 is the first DMR-compatible radio to be designed specifically for the Ham market.

  • $210

Equipment: Yaesu VX-3R VHF/UHF DualBand Handheld -vs- ZASTONE ZT-2R+

The Yaesu Receives 0.5-999Mhz AM/FMN/FMW, Transmits 144-148 & 430-450Mhz VHF/UHF FM Output is 1.5W Vhf, 1W UHF

The ZASTONE ZT-2R+ TX Frequency Ranges: 144-146 MHz 430-440 MHz (but no info on AM/FM)

Icom ICR6 Broadband Receiver

0.100 ~ 1309.995MHz in AM / FM / WFM.

Yaesu FT-736R

The Yaesu FT-736R all-mode transceiver incorporates up to four band modules covering the 50, 144, 220, 430, 440 and 1200 MHz amateur bands. The FT-736R is supplied standard with 2 meters and 440 (at 25 watts output). Standard modes are SSB, CW and FM. This radio has operating conveniences usually found only on HF transceivers, such as IF shift, IF notch, keypad entry, noise blanker, all mode VOX and three-speed selectable AGC. The memory system includes 100 general purpose memories, 10 full duplex cross-band memories and 1 global call channel, all of which store mode and frequency.


$615.00 / $667.61     Used: Excellent
$670.00 / $715.00     Used: Excellent with optional 6m and other addons
$645.00 / $697.61     Used: Excellent
$520.00 / $560.00     Used: Good with FTS8 tone unit

The Yaesu FT-726R (726 rather than 736) is an older unit that is lower power, only 10w. These typically sell for $200 less than the FT-736R and I would not recommend paying over $400 for a used working model.


  • Cushcraft A224WB - 1.25M beam
  • M2 Antennas 2225SS - 1.25M beam

Scanning the LW, MW, and SW dial

Day Night kHz use location language comments

		X	0.330	CW				
		X	3.215	AM	SW		english	news, political
		X	3.330	AM	SW		english	automated beacon
		X	3.618	LSB	ham		english	
		X	3.625	LSB	ham		english	
		X	3.700	LSB	ham		english	
		X	3.908	LSB	ham		english	
		X	3.908	LSB	ham		english	
		X	3.916	LSB	ham		english	
		X	3.936	LSB	ham		english	
		X	7.138	LSB	ham		english	
	X		7.217	LSB	ham			
		X	7.385	AM	SW		english	religious
		X	7.455	AM	SW		english	religious
		X	7.489	AM	SW		english	
		X	7.569	AM	SW		english	
		X	9.395	AM	SW		english	
	X		9.474	AM	SW		english	religious
		X	9.790	AM	SW		english	
		X	9.800	AM	SW		english	news
		X	9.955	AM	SW		english	religious
		X	9.975	AM	SW		english	
	X		9.980	AM	SW		english	religious
	X		11.550	AM	SW		spanish	
		X	11.670	AM	SW		foreign	
		X	11.780	AM	SW		foreign	
	X		11.825	AM	SW		english	religious
		X	11.840	AM	SW		foreign	same as 13.743
	X		11.950	AM	SW		spanish	strong signal
	X		12.160	AM	SW	USA	english	midwest USA, call in talkshow
		X	13.743	AM	SW		foreign	
	X		14.670	AM	SW	Canada	english	radio beacon
	X		15.120	AM	SW		foreign	
	X		15.230	AM	SW		spanish	
	X		15.370	AM	SW		spanish	same as 15.230
	X		15.700	AM	SW	China	english	China radio propiganda, news, strong signal
	X		18.155	USB	ham		english

Listen to HF ham radio streaming online

I would like to thank wd0cfc for bringing this web site to my attention which allows you to pick from a number of ham listening stations on various HF bands and at different geographic locations in North America.

Using Software Defined Radio and a good broadband connection these operators have their SDR receivers set up to stream over the Internet. Browse though the list of stations. Location, antenna type and frequency coverage are among the information posted for each station. I can even tune the station VFO and apply digital filters.

LO WebSDR HF receiver system at Lobitos Creek on the Pacific coast south of San Francisco, CA
CM87tj; 40 users

Wavelength to Frequency Table

Meter Band 	Frequency Range and Use
160 meter 	1800 - 2000 kHz ham radio
120 meter 	2300 - 2498 kHz broadcasting
90 meter 	3200 - 3400 kHz broadcasting
80 meter 	3500 - 4000 kHz ham radio
60 meter 	4750 - 4995 kHz broadcasting
49 meter 	5950 - 6250 kHz broadcasting
41 meter 	7100 - 7300 kHz broadcasting
40 meter 	7000 - 7300 kHz ham radio
31 meter 	9500 - 9900 kHz broadcasting
30 meter 	10100 - 10150 kHz ham radio
25 meter 	11650 - 11975 kHz broadcasting
22 meter 	13600 - 13800 kHz broadcasting
20 meter 	14000 - 14350 kHz ham radio
19 meter 	15100 - 15600 kHz broadcasting
17 meter 	18068 - 18168 kHz ham radio
16 meter 	17550 - 17900 kHz broadcasting
15 meter 	21000 - 21450 kHz ham radio
13 meter 	21450 - 21850 kHz broadcasting
12 meter 	24890 - 24990 ham radio
11 meter 	25670 - 26100 kHz broadcasting
10 meter 	28 - 29.7 MHz ham radio 
6 meter         50 - 54 MHz ham radio since 1947
5 meter         56 – 64 MHz taken from ham radio in 1946
4 meter         70.000 MHz – 70.500 MHz
3 meter         76 - 88 MHz 88 - 108 MHz broadcasting 
2 meter         144 MHz to 148 MHz for ham
1.25 meter      219 - 225 MHz
70 centimeter   420 - 450 MHz ham 462 - 468 MHz non-ham public
33 centimeter   902.000 MHz – 928.000 MHz
23 centimeter   1.240 GHz – 1.300 GHz
13 centimeter   2.300 GHz – 2.450 GHz

mobile antennas


Comet's BEST DualBand Mobile Antennas
2M/440MHz high gain antenna
Gain& Wave:
2M  5/8 wave  4.4dBi
440MHz  Two 5/8 waves 6.9dBi
VSWR:  1.5:1 or less
Max Power:  150W
Length:  50"
Connector: Gold-plated PL-259
Fold-over hinge included

Tram 1180

2M/70cm 5/8 wave mobile antenna
37.5" tall
NMO mount
eham: 4.1

CA-2x4SR The Comet CA-2x4SR dual band is a 2 meter and 440 MHz mobile antenna. It is a 5/8 wave on 2 meters providing 3.8 dB gain and a 5/8 wave on 440 MHz providing 6.2 dB gain. VSWR 1.5 : 1 or less. This antenna can handle up to 150 watts. This antenna is black with three coils on the whip element. The CA-2x4SR is pretuned, but an Allen wrench for adjusting is included.

This antenna is 40 inches (1.02 m) high. The connector type is UHF

hamfest, 2017, glenwood



OMMRS - Omaha Metropolitan Medical Response System -

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