Have you bought or owned black glass or grey glass tubes? Generally they are WW 2 vintage and many are exceptional and sought after for sonic quality. I refer to nothing else. With this style of tube it is unusual to see plates, or getter holder. You might see the top mica.
I have several smoked glass tubes that sound good to me. Ken-Rad and RCA.
Have you bought or owned black glass or grey glass tubes? Generally they are WW 2 vintage and many are exceptional and sought after for sonic quality. I refer to nothing else. With this style of tube it is unusual to see plates, or getter holder. You might see the top mica.
When you get into the black glass versions they might be more expensive because of rarity, I am not sure. I have owned the black glass RCA and the bass was nearly too much for a couple of my amps so I gave it away. I have heard various theories on the dark materials helping the tube's operation and the theory that for war time use they did not want a lot of light escaping if used in radios in the field. I know some of the modern Chinese tubes use an internal coating but I have never researched it much.
No, the filament current might support a 6sn7 but not a power tube. I say this without looking up the specs.
I saw one for sale and couldn't remember what one of those larger Amperex tubes would work with the Vali (adapter needed of course).
Ah, OK; thanks Paladin. Appreciate the quick reply.
You could consider the following variants of 6SN7 double triode in Vali 2: 6C8G [or VT-163] (octal pins but a different adapter with a separate heater wire); a 7N7 (loctal pins so a different adapter), @bcowen famous Frankie (see https://www.head-fi.org/threads/schiit-lyr-3-tube-rolling-thread.876016/page-84#post-14447101) and then single triodes through dedicated adapters taking twin tubes: 6J5 [or VT-94] octals, and 7A4 [or VT-192] loctals. All adapters can be purchased from e.g. Xuling Audio Labs or elsewhere on ebay. Some of these tubes still can be found for a fraction of costs of the good 6SN7. Then of course there are Russian 6SV7 analogues, 6H8C Fotons of 1951 and MELZ 1578 of similar years (caveat emptor - lots of fake ones around), and, once you have adapter for twin octals, Russian 6C2C and 6C5C fit in place of 6J5.
You can also get into single triode tubes that preceded 6sn7's (dual triode).
There are Loctal as well as octal versions.You can also get into single triode tubes that preceded 6sn7's (dual triode).There are Loctal as well as octal versions.
Depends. Socket saver - yes. There are adapters from 6C8G directly to 6922. For the twin octals and loctals, I have direct from 2 x 6J5 to 6922, but need to use 6SN7 to 6922 for 2 x 7A4 to 6SN7.
