Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Instruments and Amps Everything that makes music, Especially including instrument amps.

Jukebox Amplifier
Jukebox Amplifier
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
Thread Tools Search this Thread
Old 14th August 2017, 04:42 PM   #11
Nigel Goodwin is offline Nigel Goodwin  England
diyAudio Member
Join Date: Jul 2005
Location: North Derbyshire
Originally Posted by Malcolm Irving View Post

Probably a lot of things can cause a loss in volume, but in the one that I dealt with, that symptom was associated with an anode resistor that had drifted way up in value
That is probably the most common fault on valve amps, by FAR.

I've repaired countless ones over the decades, basically the resistors they use aren't really big enough (replace with a 1W if you have space), and the values used are the ones that tend to go high over time.

A few years back a friend asked me for advice about a fairly new Fender guitar amp, he had been offered it ludicrously cheap as it was faulty, and the guy selling it had taken it to four music shops, none of whom could repair it. I advised him to buy it, as if nothing else the transformers were worth lot's more than the asking price, and that it would most likely just be the anode loads faulty. So he bought it, brought it to me, and just as I thought the anode loads were faulty - actually three of them were.
Nigel Goodwin
  Reply With Quote


Jukebox AmplifierHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Jukebox Repair kb52 Introductions 4 21st July 2015 02:49 PM
Jukebox Woofer help please tourproven Subwoofers 9 26th March 2014 12:13 AM
Help getting my jukebox project going Cambriel Construction Tips 3 7th February 2011 11:20 PM
Jukebox Iron mosfetmaniac Tubes / Valves 9 16th December 2009 11:18 PM
Wav jukebox dhaen Everything Else 20 30th May 2003 10:55 AM

New To Site? Need Help?

All times are GMT. The time now is 10:56 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio