Hi guys, semi noob here.
Have a strategy 500 power amp. Channel B is weak / distorted / almost no bass. Here is what I checked so far:
-Track 2 or track 1 functions the same
-Switched all power and preamp tubes from CH1 to Ch2
-Checked and double checked all speaker connections and tried the 4 ohm and 8 ohm taps with diff speakers/cables
-Checked preamp Plate voltages (all high 200's VDC)
Preamp:
-Checked preamp cathode voltages (all ~1-3VDC)
-Checked coupling caps (grids on all preamp tubes 0VDC while pre-cap it is high 200's from plate)
-visually looked for cold solder etc.. pretty much everywhere
Power amp:
-checked bias supply for push/pull/cha/chb all around -54VDC
-all plate volts high DC
It would be nice to have a schematic at this point. LOL. Any troubleshooting tips from some pros?
Have a strategy 500 power amp. Channel B is weak / distorted / almost no bass. Here is what I checked so far:
-Track 2 or track 1 functions the same
-Switched all power and preamp tubes from CH1 to Ch2
-Checked and double checked all speaker connections and tried the 4 ohm and 8 ohm taps with diff speakers/cables
-Checked preamp Plate voltages (all high 200's VDC)
Preamp:
-Checked preamp cathode voltages (all ~1-3VDC)
-Checked coupling caps (grids on all preamp tubes 0VDC while pre-cap it is high 200's from plate)
-visually looked for cold solder etc.. pretty much everywhere
Power amp:
-checked bias supply for push/pull/cha/chb all around -54VDC
-all plate volts high DC
It would be nice to have a schematic at this point. LOL. Any troubleshooting tips from some pros?
