redclayrebel wrote: ↑
Tue 04/18/23 7:55 am
I think next I’d like to build one of the circuits here. Looking at the 18watt EF86 lite IIb, or the one with added gain control.I’m a little concerned with finding a non microphonic EF86. Any suggestions?
Thinking it should be in a head box and not a combo.
Also transformers, especially the output.
I think you mean the EF86 Lite 2P? That circuit is less prone to microphonics. My suggestion is to buy a few EF86s or the less expensive 6J32P Russian equivalent. You can roll them and see what sounds best.
You're less likely to have microphonic issues in a head anyway.
If you can find a genuine RFT NOS EF86, then those also tend to be less microphonic. I made an EF86 Lite (not the improved 2P) years ago, with reverb, in a combo, and didn't have any issues with that tube.
If you want the extra gain knob, that's the EF86 Xtra, go for it. The EF86 Lite 2P is identical except for the extra gain stage in the Xtra version. Hence the name.