previous: Nick Thank you Anon, for your contributi... -- 1098153702

Re: Someone hacked up my Vox...need some advice.

10/19/2004 7:30 AM

Wild Bill

Re: Someone hacked up my Vox...need some advice. Nick, things might not be as bad as they seem!     Remember that those resistors never were precisely the marked value - that's why there's a gold or silver tolerance band on 'em. Most likely they were 10%, that was pretty standard.     Anyhow, the values you measured for the most part are within tolerance. I doubt if 10-15% would make any noticeable tone difference. More than 20% and if you have good ears you'll start to notice it. Some areas of the circuit have almost zero tone effect anyway, like cathode followers. Unless the resistor drifted so far as to make the stage clip or blow up!     The caps of course ARE a big deal! If you liked mustards before - put 'em back. As for the pf caps - what kind of meter did you use? It's very difficult to measure such low values with a DMM that has a capacitance scale. Move the test leads around and the reading will swing all over the place. You need a unit designed to be accurate in this range. The good news is that such caps rarely actually drift much to affect audio circuits. Different story in a radio circuit, of course.     My point is that you should worry about specific areas rather than everything. It's like if your vintage car had some work done by a poor mechanic and lost horsepower. You don't worry about the tolerance on the window seals when your problem is the engine power.     I think Bruce pointed out the single most important point - that tone stack wiring! Nail that question down, replace the caps and fiddle with what's left just on general principles. I'll bet you a beer (Canadian!) that by this time your amp will be its old self.     .02     ---Wild Bill

 

Replies:

SpeedRacer just want to second Bruce and Wild ... -- 10/19/2004 8:01 PM anoinimois You quit smoking yet wild bill?... -- 10/21/2004 3:09 PM