MC you'll never do a tune up for me.. sputter, sputter put-put.. :-) If you change the caps what good is it if you don't check resistor values..
That half the rebuild.. LOL. Jeez ma neez.. I replaced 100 carbon comps if I replaced one.. BUT that the old Mac. Resistors are 1/2 the sound, GREAT resistors..are expensive too. Vishay foils..
If you replace filter and bypass caps, it's a good idea to scope the unit and of course check the bias. Not all units let you change the bias, BUT if the bias is out of whack, you need to check a resistor value to repair it. VTL is like that.. You check a resistor value FIRST then if it need attention you repair it first and move on to actually bias the valves to their 220-300ma. VTL expect YOU to check that value too, it's not there to NOT be used...
It's not a bad idea, do all the checks you can with a DMM and scope if you have one or (twenty like most techs). I'm not, I just love to tinker..
Regards
That half the rebuild.. LOL. Jeez ma neez.. I replaced 100 carbon comps if I replaced one.. BUT that the old Mac. Resistors are 1/2 the sound, GREAT resistors..are expensive too. Vishay foils..
If you replace filter and bypass caps, it's a good idea to scope the unit and of course check the bias. Not all units let you change the bias, BUT if the bias is out of whack, you need to check a resistor value to repair it. VTL is like that.. You check a resistor value FIRST then if it need attention you repair it first and move on to actually bias the valves to their 220-300ma. VTL expect YOU to check that value too, it's not there to NOT be used...
It's not a bad idea, do all the checks you can with a DMM and scope if you have one or (twenty like most techs). I'm not, I just love to tinker..
Regards