5 Watt Tube Guitar Amp Conversion Project

[DCarrer]

Nice. Was microphonics the main problem with them?

Microphonic and excessively noisy samples were a major cause of grief. Some were "ok" with a couple of o-rings.

I haven't experimented much with cascoded triodes but certain configurations are said to have a pentode-like response without the pentode problems. There is a chapter in the Blencowe preamp book.