This might be something for Maxx to look at, I think he wants to do the CCS mod, and he has a stash of tubes to try, I will wait to see what he thinks. He has also heard top level systems which I haven't so he will have a better idea of how far we can go with this.
Yeah I spent alot of money on tubes way back before all the mods, I went thru alot of 12pin types and then moved onto the 6pin tubes to settle on the Tung-sol 6c8g which you all know is equivalent of 6SL7.
Yeah I have heard a few great amps at around the $4k price setting from good friends, so yeah I like other amps as well.
I am almost done relocating to start back on this hobby, and was content with my bias settings, but now after seeing this I also want to try!
We have a problem here though, the gain, and how high we can go with it. We could probably go a bit higher than the high setting but I don't know how high
I think we should try reduce the NFB after you settle on your top tube choices and also the impedance mod would help offset the output impedance changes, but may need some hard calculations unless you wanna just try experiments.
I'm very happy with the amp now, it's come alive!
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That is a big change in the driver section I noticed from dismal dull stock setting.
Yes of course!
I believe Maxx has the 6c8g.
I believe they were a bit more neutral than the 6SL7 type for me.
The Tung-sol was most resolving for me, while other great tubes I tried (different type) where actually adding more tube sound which I felt was a bit too euphoric.
I wanted a clean sound.
For greater resolve I am looking at tinkering one last time at the output stage. Specifically those WCF caps.
Also, its sad these "traditional" designs are so component dependant.
The market is almost all traditional designed, just like some top tube amps I played with.
No real advancement in the tube amp market.
So I am going to try the CCS, then swap out the output tube cathode caps with some others (Muse caps), and then WCF caps I have (are to romantic) for more clear ones .
Then give up lol.
I would say the output tube bias change is also what made a huge difference for me.
I no longer use stock output tube type there either.
So this thread is still not finished , but Baronbehive did a HUGe push with testing here.
Also thanks MrCurwen for your knowledge and input.
I really think its great and valuable .
I think Sonic amp will be great because of this.