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McAlister PP150
McAlister PP150
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Old 23rd December 2010, 05:00 PM   #1
carusoracer is offline carusoracer  United States
diyAudio Member
Join Date: Nov 2006
Location: Central, OH
Default McAlister PP150

Hi Anyone familiar with the McAlister PP150?

I have the Amp and it performed nicely until one day I lost the right channel. I thought it was one of the sweep tubes that was out but something strange is happening.

I can take the far right tube that is glowing and switch it with the tube in the V7 position or third power tube socket and it will glow. Here's the catch neither right channel of the two output tubes will be glowing together as normal at the same time
You can put any known working tube in the right to channel output tube sockets and one will be dead and then it will switch over to the other socket and it will be dead.
Is it a resistor issue? I do not have the ability to fix it and do not have the schematics from Peter McCalister. Apparently this is one of several different versions and he is in Canada. I'm in central OH near Columbus and would like to get it back up and running again.
Any help is appreciated. Thanks
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