McAlister PP150 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 23rd December 2010, 06:00 PM   #1
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
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 02:23 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2