Hello,
I'm a happy owner of a DC-3 combo amp (REV B). I'm OK with the Rhythm Channel but I find the Lead Channel quite lifeless. I miss some highs that helps cut thru in band. I mean some extra brights or a little fuzz type high, in a good way.
I've found many theoretical possible mods, but I want to implement only few to achieve what I want. The options I can see:
- increase the V1b grid resistor from 470k to 1M
- remove the .001 cap in front of V2a
- remove the .001 cap at the end of the Lead preamp after the Master pot
- play with the tonestacks (fixed and adjustable): slope resistors, etc.
- add a bright cap like in the Rhy channel to the gain pot
Are there any more to take into this list? What do you think about the above listed mods? Which one is the most promising for my needs? Which ones did you try?
Two more questions:
1. I found the REV A schematic of DC-3 on the net, but not the REV B. Does anybody have it?
2. In the DC-3 Lead channel's adjustable tonestack there is a 6k8 resistor between the mid and bass caps. This is not so common, I've never seen in other designs. What this resistor is doing?
Thanks,
Balint
I'm a happy owner of a DC-3 combo amp (REV B). I'm OK with the Rhythm Channel but I find the Lead Channel quite lifeless. I miss some highs that helps cut thru in band. I mean some extra brights or a little fuzz type high, in a good way.
I've found many theoretical possible mods, but I want to implement only few to achieve what I want. The options I can see:
- increase the V1b grid resistor from 470k to 1M
- remove the .001 cap in front of V2a
- remove the .001 cap at the end of the Lead preamp after the Master pot
- play with the tonestacks (fixed and adjustable): slope resistors, etc.
- add a bright cap like in the Rhy channel to the gain pot
Are there any more to take into this list? What do you think about the above listed mods? Which one is the most promising for my needs? Which ones did you try?
Two more questions:
1. I found the REV A schematic of DC-3 on the net, but not the REV B. Does anybody have it?
2. In the DC-3 Lead channel's adjustable tonestack there is a 6k8 resistor between the mid and bass caps. This is not so common, I've never seen in other designs. What this resistor is doing?
Thanks,
Balint