SIx String Chef
Ambassador of Taste
Thank you kindly, Ivan!! This info will be very helpful to buy a set of NOS tube spares for the whole amp to have on hand when it's needed. Cheers, mate!!The 7591 is no problem, they are in current production, JJ, EHX that I know of off the top of my head. The 6AU6 pentode was good for many applications & along with its "equivalents" was very widely used, so finding NOS/NIB shouldn't be too much of a problem or too costly. Cheers.
Edit:
Here's a Russian equivalent for 2 bucks.
CheersTubes-Store.com → Other tubes → 6J4P / EF94 / 6AU6 tube
Russian 6J4P pentode tube. Equivalent to the 6AU6 / EF94. <p> <li>Name: 6J4P <li>Type: HF pentode <li>Application: HF voltage amplification <li>Cathode type: oxide, indirect heating <li>Envelope: glass, miniature <li>Mass, g: 13 <li>Filament voltage, V: 6,3 <li>Filament current, A: 0,275-0,325...tubes-store.com