Dumbleland Silver Alligator Inspired Build

[Mr. dB]

I'm still hesitant with the LNFB V1b+V2a, actually it's V2+V3a. If V2 is a pentode, there isn't enough parts in the circuit to make it work.

Based on the comment from

Electron: You have the first tube right,but the feed back on the second tube is taken off the cathode of a third tube .

And after reading this: http://www.valvewizard.co.uk/pentode.html

I am wondering if maybe the LNFB is not like attached in the SSS #002 style with the values from the handsketch (10M, .05uF)?

Pure guessing so take it with a pinch of salt

You've returned your feedback loop to ground?

If you meant to return it to the cathode, you can't do that either unless you remove the bypass cap.

[Bombacaototal]

I'm still hesitant with the LNFB V1b+V2a, actually it's V2+V3a. If V2 is a pentode, there isn't enough parts in the circuit to make it work.

Based on the comment from

Electron: You have the first tube right,but the feed back on the second tube is taken off the cathode of a third tube .

And after reading this: http://www.valvewizard.co.uk/pentode.html

I am wondering if maybe the LNFB is not like attached in the SSS #002 style with the values from the handsketch (10M, .05uF)?

Pure guessing so take it with a pinch of salt

You've returned your feedback loop to ground?

If you meant to return it to the cathode, you can't do that either unless you remove the bypass cap.

I thought this was the approach taken on #002 (attached) between V1B and V2A

Just realised I am missing one resistor before the ground of the 1st cathode

[Mr. dB]

Just realised I am missing one resistor before the ground of the 1st cathode

Ah that makes all the difference.

[Bombacaototal]

Just realised I am missing one resistor before the ground of the 1st cathode

Ah that makes all the difference.

Sorry about that

BAck to the task in hand, is this idea a possibility? Another could be cathode of V3b and plate load of V2, but not sure how that would work

[Bombacaototal]

Another pic of this amp (right side)