K-12G problems - 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 15th May 2009, 01:06 PM   #1
diyAudio Member
 
Join Date: Nov 2007
Default K-12G problems

Hello all,

I have a K-12G kit that I had working for about a year. Well, recently, I took the amp and put it into a new enclosure. I added more inputs and a selector switch. Now when I hook it up and turn it on, I get this loud buzzing coming out of my right speaker and nothing out of my left. My questions for you guys/gals are:

1) What should I be looking at for troubleshooting? Solder joints? Bad components?
2) Am I doing anything to my speakers - I would hate to blow these speakers as they were quite expensive.
3) How can I safely do this troubleshooting - preferably without speakers connected if I may be damaging them.

Only changes made from when it was once working to now was the addition of the selector switch with extra inputs and the recasing into a new enclosure (wood and plexiglass).

Thanks in advance
  Reply With Quote
Old 19th May 2009, 10:47 PM   #2
diyAudio Member
 
Join Date: Nov 2007
bump!
  Reply With Quote
Old 20th May 2009, 07:52 AM   #3
diyAudio Member
 
azazello's Avatar
 
Join Date: Aug 2008
Location: Bulgaria
Maybe the problem is in the selector and inputs.
If You connect selector's out, to ground, is there buzz??
__________________
Projects: OTL-OCL 6AS7 Gen. Electric, SEs 2A3 RCA, 300B JJ, 6S4S, 4P1L, EL11 Telefunken, 6AS7 RCA, 6S33S, 6S41S, 6S19P, E84L Siemens, E236L Telefunken, headphone ampl. OTL Loftin White 6AS7 RCA,... PPs 6005 Gen. Electric, EL34 Mullard, 6L6....
  Reply With Quote
Old 21st May 2009, 08:30 PM   #4
diyAudio Member
 
oldmanStrat's Avatar
 
Join Date: Apr 2009
I'd start with an ohm meter and trace the input from the connector through the switch to the board.

Do this on the channel that is buzzing first, the problem is likely there.

Also, I noticed that I had buzzing on my amp on the volume pot, until it was grounded. Did you ground the switch?
__________________
For security reasons my name is changed daily...
  Reply With Quote
Old 21st May 2009, 09:41 PM   #5
diyAudio Member
 
Join Date: Nov 2007
thanks for the suggestions... everything is grounded but i'll double check the circuitry...
  Reply With Quote
Old 22nd May 2009, 09:52 PM   #6
diyAudio Member
 
Join Date: Nov 2007
Default figured it out... kinda....

hi all,

thanks again for the suggestions... i traced the problem to a faulty switch... one position works and the other 2 don't. it's not a big deal - i'm okay with just one source for now since i'm moving onto a TubelabSE and relegating this amp to the office, where it will only be used for the iPod anyway.
  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
GFA-565 problems ben62670 Solid State 5 14th August 2008 06:36 AM
HK AVR 335 Problems utjay2008 Solid State 0 21st October 2007 02:26 AM
Sub Amp Problems Thanks! crippledchicken Solid State 2 10th January 2007 06:17 PM
JLH problems serosmaness Solid State 11 2nd November 2004 06:17 PM
RFI problems laz Solid State 3 21st February 2004 07:06 AM


New To Site? Need Help?

All times are GMT. The time now is 08:23 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