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Messages - Just Mike

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Amplifier Discussion / Re: Peavey Tmax-Where to start?
« on: May 24, 2021, 01:34:26 PM »
All looks good, I have the fan operating, front panel LED's are on and front panel ch. switching buttons work. I just ordered the output device. Should be good to go, eh?

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Amplifier Discussion / Re: Peavey Tmax-Where to start?
« on: May 23, 2021, 03:13:34 PM »
Thanks Tony. I got a schematic and the first thing I did was pull and test the output transistors. One of the PNPs is shorted. I soldered the rest back in. Can I now test for voltages with no speaker plugged in? There are no blown fuses.
 


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Amplifier Discussion / Peavey Tmax-Where to start?
« on: May 23, 2021, 08:19:35 AM »
When I power it up I just get a hum thru a speaker. I've built and repaired countless tube amps, but I'm going to need some guidance with this one. Where do I start troubleshooting this? I assume the power rails and output devices are the first place?

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