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

Instruments and Amps Everything that makes music, Especially including instrument amps.

Guitar Amp HUUUM with an MP3! Reverb Problem
Guitar Amp HUUUM with an MP3! Reverb Problem
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 30th December 2005, 04:32 AM   #11
ted777ted is offline ted777ted  United States
diyAudio Member
Join Date: Mar 2005
Location: USA
Gene, about half of the background hum went away when I grounded the reverb pot at the middle pin. It's certainly playable when I ground it, and I have to say the amp sounds very good! Nice clean tones and the distortion is pretty smooth. Much better than I expected. It will also rattle the windows in my living room with ease!

By the way, in the mp3, the idle buzz sounds like it does in person, but hum created by turning the reverb control makes a deeper bassier hum than it sounds in the clip.

I took a look at the reverb spec calculator, looks pretty cool, but my tank is a 2 spring Belton unit. The Belton is physically longer than the Accutronics 2 spring units. Luckily there is a phone number to Belton in Korea on the unit. I played around flip flopping the grounding and such on the reverb pan with no change.

I would really love to get the reverb hum down and play some guitar. Any more thoughts or suggestions?

  Reply With Quote
Old 30th December 2005, 04:12 PM   #12
Trout is offline Trout  United States
diyAudio Member
Trout's Avatar
Join Date: Nov 2004
Location: Midwest Madman
Can you post a picture of the inside of the chassis?

My thought is looking at the schematic, Bypass the reverb section. But of course that pretty much depends on the chassis wiring. Is this printed circuit? Tag Board? Point to Point?

If the reverb stage is fully bypassed, Then maybe you can locate the other hum source " IF " there is one.

( Just my opinion )

I never use spring reverbs, They are even in the best amps I have played less than ideal, Noisey,Common source of feedback, And lord knows terrible if the amp is positioned near the drummer on a Knock Down bouncy stage.

I am far from an expert on this, But for recording I use a no effects setup at the amp, And add things like reverb or chorus with Cubase SX recording software. If I am playing out I use effects pedal for what little I ever need.

Rarely do I ever use much reverb, Generally I just breath on the knob at the pedal to take out a bit of the dryness.
Of Course opinions vary on this.

If the reverb stage is fully bypassed, Then maybe you can locate the other hum source " IF " there is one.

Looking at that schematic, I bet that baby has a great clean sound!
  Reply With Quote
Old 31st December 2005, 07:23 PM   #13
aletheian is offline aletheian  United States
diyAudio Member
aletheian's Avatar
Join Date: Apr 2004
Location: Philly
Good point. The placement of the reverb transformer and the tnk itself is very important as well.... as is lead dress. Tube reverb in amps is a pain in the A** to get right, but once you get it, you should be fine.
Heghlu'meH QaQ jajvam!
  Reply With Quote


Guitar Amp HUUUM with an MP3! Reverb ProblemHide 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
problem with old reverb - help? 2SK30 Digital Source 5 22nd July 2008 11:56 AM
Problem with my marshall jcm2000 tsl 122 100W Combo, Reverb on full after warm up craymorr2003 Instruments and Amps 1 12th April 2008 09:50 PM
I need a simple ss reverb for a ss guitar amp. yeto Instruments and Amps 8 18th January 2006 07:54 AM
reverb tank in a guitar amp connection dud_wity Instruments and Amps 1 19th June 2004 01:58 PM

New To Site? Need Help?

All times are GMT. The time now is 12:01 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio