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

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Hum in Legend amp
Hum in Legend amp
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 23rd February 2007, 03:30 AM   #1
Nixie is offline Nixie  Canada
Banned
 
Join Date: Jan 2006
Location: Vancouver, BC
Default Hum in Legend amp

I'm having trouble tracking down the source of buzz/hum in a 70s guitar combo amp, a Legend Super-lead 50. It's a hybrid, with solid state output. The buzz/hum seems to be from the high gain input; from what I can tell the other input bypasses the first tube, and if I turn down the Lead Level knob it also goes down (but of course, loss of volume). Any troubleshooting suggestions? The hum/buzz is the same regardless of what position the 3-way ground lift switch is.
  Reply With Quote
Old 23rd February 2007, 03:40 PM   #2
Trout is offline Trout  United States
diyAudio Member
 
Trout's Avatar
 
Join Date: Nov 2004
Location: Midwest Madman
Wow, Those old Legends are Sooo cool, I love those solid oak cabs, Unless Im carrying them




There is very lettle documentation on the web for those babies, I nearly bought a couple a while back at a local MOM N POP music store that still has 2 of them that never sold.

I think I would start at the input jacks, Make sure they are closing/shorting properly. I have seen those old jacks cause a lot of problems like that due to tarnish and or oxidation.

Good luck finding a schematic though, I have never been able to locate one.

Trout
  Reply With Quote
Old 23rd February 2007, 09:02 PM   #3
Nixie is offline Nixie  Canada
Banned
 
Join Date: Jan 2006
Location: Vancouver, BC
I found someone selling one but they're asking $15...
  Reply With Quote
Old 25th February 2007, 01:06 AM   #4
Trout is offline Trout  United States
diyAudio Member
 
Trout's Avatar
 
Join Date: Nov 2004
Location: Midwest Madman
Hey Nixie,

This topic just came up on another forum I frequent. Anyways, This may be just what you looking for.

http://legendamps.tripod.com/

There are full schematics posted here.


They are sort of small pictures, But at least you can get the general info you might find yourself needing.

Trout
  Reply With Quote

Reply


Hum in Legend ampHide 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
Eminence Legend B102 or ? nvrgdenuf Multi-Way 4 22nd January 2012 06:37 PM
Boras Legend 4 Mosfet Amp east electronics Solid State 42 21st March 2011 02:40 PM
bora's legend 4 consideartions east electronics Solid State 6 24th May 2010 08:33 PM
bora's legend 8 legend 4 east electronics Solid State 0 8th March 2007 01:25 PM
Spector Legend 6 classic phase_accurate Instruments and Amps 7 23rd January 2007 03:24 PM


New To Site? Need Help?

All times are GMT. The time now is 06:14 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
Wiki