THD Yellow Jacket short adapters with two jj EL84 tubes. These are model number Short YJS and are the adapters that will work on 6V6, 6L6 or EL34 amps.
If your reading this you know all about these things so I won’t bore you with details but I will tell you this…….they work. If you’ve got a big amp and a small room, they’re your best friend.
These are not for use in Champ and Tweed Deluxe amps.
Tubes are included.