The feel is now stiffer and there's a noticable loss of either gain or some compression. Sounds like someone turned the mid control all the way up. It just honks.. I'm hoping this problem can be solved without having to take the loop out altogether.
I used a 22K decoupling resistor which gave me 310 volts when measured at the loop board. Perfect range according to the Metro literature.
After measuring the B+ from pin 3 of the output sockets after the mod I did notice that the B+ voltages in the amp are now @ 30 volts higher.
Aside from adding the dropping resistor the directions called for a single swap of a 5.6k resistor in the PI where the (2) 10 K's were in series. Seems like this was a big drop. I'm wondering if changing this value a bit could get the amp back where it was before the mod. My original plate voltage was 425 volts.
Voodooamps posted in a RG thread mentioning the loop ideally should be in series with the B+ rather being in parallel to the B+ as the Metro directions detailed to keep it transparent. Transparency of the loop isnt really my issue however. Its possible this may have something to do with why I'm not happy with the results but again, the loop itself seems to be doing it's job, the amp itself sounds really bad with the addition of this loop.
Something has to be tweaked a bit somehow, the voltages restructured possibly. This is unfortunate, my best sounding Marshall is now my worst sounding Marshall.
Any input would be appreciated. Thanks a lot!!
