Very Simple Hybrid Ampifier

This is as built version i tried.
 

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Peter,

You are very creative, but you have been off on a tangent with a new 'madness' amp!!
Why are you ignoring your older design, your hybrid is wonderful, would you consider refining it further? Maybe a few other tubes?

I ask because I know Terry likes it very much and he has built more amps than I have had hot dinners....... I'm not particularly well, and my input is restricted to comments from the sidelines, otherwise I would be building it too. But I'm selfish, I want smart guys like you, Thimios, Terry and Bimo to build the best amp in the world - with a wacky, unconventional design.

Ciao

Hugh
 
Hi Peter,

My tubes arrived for the ECC88 boards. They are the 6N1P tubes. I'm looking back through the thread and I don't see instructions for setting R9 trimpot. Can you explain that for me please?

Thanks, Terry

I found it is difficult to set DC Offset in simulation. First, I set R9 to get minimum DC Offset, but some value the DC offset can go as high as PSU voltage.
 
R9 sets the I cathode and R10 the out offset.
I tried two tubes.One used 12AU7 and one new ECC82.Using the 12AU7 i ended with 33mV offset,Using ECC82 the offset it is possible to trim at 0mV offset.
My board is according to previous version.

Hi Thimios,

I already have the original boards working perfectly. These are the ones designed for the ECC88 tube. What I want to know is how to set R9. I don't know where to measure and what voltage to set it to.