The following lines were added (+) and removed (-):
6LQ6 - 6LQ6 - Common in CB linear amplifiers. TV sweep tube. This tube is rare and expensive. 3-500 - Heathkit SB-220 and SB-221 HF linear amplifier uses 2. Other brands also use, Ameritron, Henry, etc.. 6146B - Kenwood ts520 and ts830 uses 2 along with other HF transceivers. 12BY7Z - driver tube in many HF transceivers such as the Kenwood ts520 and ts830 6JS6 - Yeasu uses this TV sweep tube in their ft101, now rare and expensive.