Tube Amp Archive

Had a nice score myself. Found an old Voice of Music reel-to-reel. Inside lurked a quad of VoM stamped Mullard 12AX7As.

aha! Gracias!

Where in the circuit would this go?

Ltspice is good for schems and circuit sims. I use visio for layouts. Not much help for mac on the layouts. Sorry.

M Fowler wrote:I built the Orange Retro 50.

I would maim for a readable schematic.

boots wrote:Branson, you must be the guy that buys all the tubes from the antique shops before I get there! I am in Farmington every day - let's get together sometime.

I try, but find quite often that I'm there too late as well...

Thanks, by the way. PM me!

Branson

Thank you. Again.

A picture.

Thank you all for your help. I finished only my second build recently: a 2 channel w/active FX loop 18 watter. Without this forum, I would have never been able to complete such an ambitious undertaking. I call it the Sunder 18. Here's a bit of what you helped create: https://soundcloud.com/bransonco...

Changing the slope resistor (R4, I believe) to a smaller value will lower the register of the entire EQ. It will also substantially boost the mids. I went from 100k to 33k and it was WAY too dark. I finally settled with 80k and am quite happy.

I had a similar problem with my Weber Java build. It did turn out to be an oscillation. I wound up shielding every grid wire (pre and power) and placing rather large (4k7 to 33k) resistors on every grid. I don't know if this is your problem, as you seem to have a great deal more room in the chassis ...