6v6 SEP

[Mosquito]

Hi everyone!
Well, It seems that I'm approaching the final stadium of the "tube sickness", I'm entering the SE madness...
Once on it, I remember the words of a DIY guy wiser than me: "I never heard an EL84 amp that do not sound at least very good" but also remembered another wise guy saying " God knows that the world do not need another EL84 amp"
So, I was looking around for some simple solution, and from one discussion in this forum, my sight falls over this one:
picture A

Well, I was trying to re- arrange the schematic for my better understanding:
picture B

And there is the arrangement of G3 - R10 (100K) that confuses me, because is very different to others pentode-pentode SE amps (the Mullard 3_3, for example)
It is a kind of local feedback or simply a mistake of my re- arranged drawing?
By the way, I decided for a 6V6G - 6J7G because I want the amp to be full octal tubes (there will be a 5U4G too), 4-5 watt will be enough, and these tubes looks really cool .
I'll be grateful for any advice

[TheGimp]

I think the 100K resistor is providing Schade Feedback. There are several threads here on it. Search for Schade.

Also search the web for O.H.Schade Beam Power Tubes 1938..

A little over half way down here:

Tube Data

[Mosquito]

Thanks, I suspect something like this, but I wasn't sure,... In the doubt I supress the GNF of the original
Nevertheless, I believed that the Shade local FB being plate to plate

[Globulator]

Originally Posted by Mosquito

Thanks, I suspect something like this, but I wasn't sure,... In the doubt I supress the GNF of the original
Nevertheless, I believed that the Shade local FB being plate to plate

Yes it is - that's just regular feedback, but not much of it .

[Wavebourn]

Try as is, with both feedbacks. It should sound nice.

[Mosquito]

Yes, it's a wise policy, mods, maybe, but not before trying the original...

[Nikolas Ojala]

That two pentode circuit reminds me of another two pentode amplifier.

Mullard 3-3 Three Watt Amplifier

There is a bonus: DC-connected stages. No need for a capacitor between them.

[Mosquito]

Yes, it's a classic, but I'd like to try the other one just because it is "different"

[gja]

Did you finish the amp?
How does it sound?Agree with you that the tubes look awesome.

[Mosquito]

Unfortunately not. Some personal and financial issues leads me to stop the project . Hope to restart very soon.
Kevin Connor builded up a similar thing, with great success, and shared a lot of useful info, specialy about the pentode gain stage.
Mine will be different in some aspects.
Last thing I did on this, was a provisory schematic to look at possible ways to inject the partial feedback signal. Nothing other than that. It still remains the tubes to be ordered and to think about the chassis, etc
Here the circuit, but need still a lot of work...
I'll let now here , if any progress
Cheers
J