Rig-Talk

Guitars, Gear, Tone!
It is currently Sun, Jan 22, 2017 7:34pm

All times are UTC - 5 hours




Post new topic Reply to topic  [ 3 posts ] 
Author Message
PostPosted: Mon, Jan 09, 2017 12:49pm 
Offline
Journeyman NOOB
User avatar

Joined: Wed, Jan 13, 2010 8:06am
Posts: 206
Hi
I've just scored a mint Fryette 2:90:2 with JJ kt88 in it
(I already own one and wanted a backup for shows)
I've just noticed a weird hum noise problem when I switch both channel A and B on at the same time
If I only play through channel A or channel B alone (other one in standby) , there's no noise at all.
I'm not sure if it's a tube problem or something worst
Here's a video of the problem

_________________
http://www.reverbnation.com/dilemband


Top
 Profile  
Reply with quote  
PostPosted: Mon, Jan 09, 2017 1:42pm 
Offline
FJA Mods
User avatar

Joined: Fri, Jun 23, 2006 10:09pm
Posts: 1093
Location: Syracuse, NY
What do you have it hooked up to? Sounds like a ground loop.

_________________
FJA Mods
FJA Mods YouTube
FJA Mods Tech Help Forum
FJA Facebook


Top
 Profile  
Reply with quote  
PostPosted: Mon, Jan 09, 2017 2:31pm 
Offline
Journeyman NOOB
User avatar

Joined: Wed, Jan 13, 2010 8:06am
Posts: 206
absolutely nothing
no input cables
just output to different cabs
same noise happening whatever the cab is and my other poweramp plugged the same way isn't making any noise with the same cables.

I've tried swapping power tubes and the noise seems to be alot less with my other amp matched sovtek kt88 tubes.
I think I'll need to order new matched power tubes

_________________
http://www.reverbnation.com/dilemband


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group