A&R Cambridge A60 Amp left channel very low distorted - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 8th November 2009, 10:42 PM   #1
diyAudio Member
 
Join Date: Nov 2009
Default A&R Cambridge A60 Amp left channel very low distorted

Hi folks I am new to this forum.
I have an old A&R Cambridge amp, the faults it is currently displaying are:-

1 Noisy operation of volume control
2 Very low output from left channel ( if you turn up the volume the sound produced is very distorted).

At first this would only happen after a few hours operation, now its permanent. I suspect something has overheated but can't see any evidence of this when I look inside the amp.
Anyone care to offer advice on how to fix this?


I've just taken the amp out of storage it hasn't been used for the last 15 years


regards

Barry
  Reply With Quote
Old 9th November 2009, 08:21 AM   #2
jaycee is offline jaycee  United Kingdom
diyAudio Member
 
Join Date: Apr 2004
Location: Norwich, UK
Arcam will quite happily send you the schematics of the amp if you ask them to. They're great in this regard! Make sure you tell them your serial number so they can tell you the correct schematic to use.

If memory serves, a common failure is a muting FET, which causes these symptoms. There are a few different versions of the amp so you need to find out which one you have.

The noisy volume control is most likely as simple as the volume pot being dirty or worn. A replacement pot should be easy enough to get.
  Reply With Quote
Old 29th November 2009, 08:24 AM   #3
diyAudio Member
 
Join Date: Nov 2009
Hi Jaycee,
Thanks for the advice, I tried to contact arcam via email from their website, all I got back was an out of office auto reply stating they would deal with my inquiry as soon as they could.
I have now fixed my amp one of the power transistors was faulty I replaced all four just to be sure and ajusted the quiescent current. The amp is now sounding wonderfull.

Thanks for your advice

Barry
  Reply With Quote
Old 18th May 2010, 08:13 AM   #4
wabun is offline wabun  United States
diyAudio Member
 
Join Date: Sep 2009
Blog Entries: 1
I have the A75, Cambridge Audio power ampo schematics, do u want it ? if u do, PM me and I send you a copy..
  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


Similar Threads
Thread Thread Starter Forum Replies Last Post
ppi pc2150 distorted right channel 67elcamino Car Audio 16 29th August 2009 06:46 AM
Distorted left channel - Marantz 2385 jblmar Solid State 2 27th March 2009 05:04 PM
Distorted left channel Proton 520 Amp allank Solid State 1 13th September 2006 01:41 PM
put my pre-amp together and now the left channel is playing distorted :( elizard Solid State 21 4th April 2003 06:23 AM
Help!! Right Channel Freq distorted. TPC Tubes / Valves 3 16th January 2003 02:27 PM


New To Site? Need Help?

All times are GMT. The time now is 08:24 AM.


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