Enhance your radio communication equipment with four top-quality GI-7BT triode power amplifier tubes. These tubes are new old stock and are perfect for high power output on HF, VHF, and UHF bands. Made in the Russian Federation, they are compatible with universal brands and have a VHF band. With a GI-7BT model and OTK-2 labeling, you can expect excellent performance and reliability. Ideal for radio enthusiasts and professionals, these tubes will surely take your communication to the next level.

These tubes all appear to be brand new. They are untested. I am not very familiar with this technology, but I believe they are all the same. I will answer any questions I can. Please do your research before purchasing.