Tube Amp Archive

andyhardy wrote:Just found this online thought I would share. Lots of cool schematics for those old tubes we never throw out.
Seems the warning comes up on this if you try to view it?

Great find, thanks for sharing

Bear wrote:A brownface with harmonic tremolo? You're killing me.

Yeah, personally I'd just want to tune it up to spec. I've got a brown Super that just doesn't require tweaking, let alone gutting.

Holy Resurrection Batman!! :D Regarding the 100K v.s 56K cathode follower to ground. A 56K would yield more gain and compression compared to a 100K, or is it the other way around? I'm pretty sure a 56K gives more gain than a 100K, but I'll drop the question, because some threads states the opposite...

Just one note- I think you may possibly need to reverse the PRIMARY o/p transformer leads if the amp squeals after adding NFB (not the SECONDARY leads).

Good luck!

fusionbear wrote:Its my son's amp, so I will put a switch. NFB on when he is playing his drop tuned metal stuff and no NFB when I borrow his amp...

That's an insightful thought & it cracked me up!

Reminds me I've got an iron set pulled from an old basket case vt-40...I need to work that stuff into a project!

I currently have a greenback RI & a G12K-85 running in my twinwreck (converted SF twin, B+ around 410vDC). The two compliment each other well- the mids of the greenback & the fuller lows of the 85. However once the amp is plugged into my marshall 4x12 with G12h30s, the game is over! To me the low en...