I purchased this tube just a few days ago as I went through a process of trying out different tubes in my microphone. I left the tube in my microphone for about 36 hours with the power on to "burn in"

 

Vintage Pioneer SX-636 Stereo Receiver Description : All items are sold as is, so please read below and ask all questions prior to bidding. Item Information Item Description: Vintage Pioneer SX-636 St

 

1 pair of Jabo KH-55 Laboratory series horns. The horns are a further development of the famous Jabo 50. After more than a year of improvement the company Jabo had the success of constructing the horn

 

Vintage Raytheon 6SJ7 GT vacuum tube. Circa mid 1940's to early 1950's. Made in the USA. In excellent cosmetic condition and tests strong on a Mercury Mod. 204 tester. No gas, shorts or leaks. This vi

 

Item pulled from Military Equipment...tested before and after pull and works as it should. I have included schematics in pictures.

 

1967 vintage Japan TUBE AMP DIY GUITAR AMP PROJECT Roberts reel to reel Left side

 

Vintage Westinghouse H807T5 AM Tube Radio , The case is poor but clean condition . It has a crack that is repaired and a piece of one stand missing but still stands upright , There is no back to the r

 

THIS SALE IS FOR 5 MAJESTIC GLOBE 26 226 VACUUM TUBES. THEY WERE TESTED ON MY TRIPLETT TUBE TESTER WITH GOOD READINGS OF 97, 79, 77, 71 AND 61. THE MINIMUM GOOD READING IS 54. SEE MY OTHER AUCTIONS FO

 

Pair (2 transformers) of vintage Newcomb TR -91 transformers pulled from a working mixer. Included are hard to find 9 pin sockets. One has a little paint worn off and small dent on top edge. The other

 

I'm putting on some lots of audio tubes that I have obtained and tested. Here are (3) Mullard made 6DJ8/ECC88's that I have tested on my Heathkit TT-1 mutual conductance calibrated tube tester. They h