[Mike B.]

Selling two matched pair of lightly used GEC TT21 tubes. The plan was to convert my KT88 amps to use this tube. The only difference it the top cap on the TT21. One mono amp biased to the required amperage. The second did not have enough adjustment to lower to the desired point, so the idea was scrapped. $300.

 

[Mike B.]

To the top. Thank

[jetpack]

A decade on, but I sometimes look in my electronics racks and find stuff from my youth..... so, any chance you still have these? .