Pro Reverb Mod Ideas

[foreverstrung]

Hi Guys

The control on the rear panel is called "Output Tubes Matching" and just alters the balance of current NOT the median value of current. There is a 3k3 to ground off the wiper of this control. You could change this to 4k7, say, (which might be too cold), or lift one end and add a 10k pot in series with it to give actual variable bias.

Good luck

t's actually a 33.4k resistor. Still a 10k pot in series will work as a variable bias? 
Thx
Dave