On 7/31/23 18:36, Jim McClave via Jukebox-list wrote:
Yes Jay, rebuilt amp and tubes checked. The schematic im using just shows the pin 5 to pin 2 ground connection. But since mine is reading 12 meg, I believe I see a connection to the field coil, Wouldnt that cause my indications?
Ground is pin 2. Field coil is between that and pin 3. A shorted field could cause the overload. There's also AC line voltage on the speaker jack between pins 1 and 6 as a form of interlock to prevent powering the high voltage without the speaker plugged in. Between that and the field voltage, that speaker plug is threatening to bite the unwary. Treat it with respect.
With the machine powered off, unplug the speaker. Measure the resistance between pins 2 and 3 of the speaker plug (not the amplifier socket), black and yellow wires. It should be in the vicinity of 6000 ohms or so. If so, the speaker field is good and your overload is elsewhere. If it's substantially below that, you have a shorted field coil.