Noisy transformer Usher R1.5 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 13th January 2010, 03:34 PM   #1
diyAudio Member
Join Date: Dec 2009
Default Noisy transformer Usher R1.5

I have an Usher R1.5 power amp with a noisy transformer. We just moved and the hum from transformer seems to have gotten louder I don't know if it's just the acoustics of the new room, I never really noticed the hum in the previous location. Is this typical of these amps? The amp seems to perform fine otherwise. I took a look inside and the transformer is bolted down securely. It starts humming as soon as it is turned on even with nothing connected, grounded and not gounded? Any cure for this
  Reply With Quote
Old 13th January 2010, 04:15 PM   #2
diyAudio Member
StevenOH's Avatar
Join Date: Jun 2004
It might be that the wall AC voltage is higher in your new location (relatively to the number of the primary turns).
The truth is out there. Who can handle the truth?
  Reply With Quote
Old 19th December 2014, 04:04 PM   #3
Philvv is offline Philvv  United Kingdom
diyAudio Member
Join Date: Dec 2014

Did you solve the hum?

What did it turn out to be?

  Reply With Quote
Old 19th December 2014, 04:27 PM   #4
diyAudio Member
Join Date: Dec 2009
No never really solved the hum problem, we have moved again and it seems less noticeable probably just very sensitive to dirty AC. Did notice when I open my unit that the balanced cable connection were never wired and the switch for mono was not wired either?? Bought the unit used and it was much too late to complain just FYI.
good luck
  Reply With Quote
Old 19th December 2014, 05:05 PM   #5
Philvv is offline Philvv  United Kingdom
diyAudio Member
Join Date: Dec 2014
Thanks for the reply.
The seller is getting the one i would like tonbuy checked out at a dealer.

How do you find tne sound?
Some comments on tne web about tne treble being edgy.
Is tnis just very knit picky?
How do you find it?

  Reply With Quote


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
Noisy transformer akis Power Supplies 42 22nd October 2012 10:44 AM
usher R1.5 noise david foster Solid State 2 29th December 2009 06:25 PM
noisy filament transformer Craig405 Tubes / Valves 14 5th August 2007 10:51 AM
noisy noisy noisy noisy noisy tube dsavitsk Tubes / Valves 50 20th February 2006 04:07 PM
Noisy Transformer pinkmouse Parts 3 4th July 2002 05:21 PM

New To Site? Need Help?

All times are GMT. The time now is 02:25 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2