Graaf GM-20 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs 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

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 6th February 2013, 10:49 PM   #1
diyAudio Member
Join Date: Feb 2013
Default Graaf GM-20

Hello. I'm a newbie, and have an opportunity to buy a '97 Graaf gm-20, for some 1000.
There are some scratches outside, and DIY bars under- it seems a dirty job, and there is some patina or something on metal connections... I'm attaching photos so you can check it out. Otherwise amp sounds good.
What do you think, what are future problems and is price for amp in this shape high?
Many thanks,
Attached Images
File Type: jpg Screenshot from 2013-02-07 00:45:07.jpg (204.5 KB, 292 views)
File Type: jpg Screenshot from 2013-02-07 00:45:28.jpg (192.0 KB, 277 views)
File Type: jpg IMG_0598.jpg (701.9 KB, 279 views)
  Reply With Quote
Old 6th February 2013, 11:56 PM   #2
diyAudio Member
Join Date: Apr 2006
Location: copenhagen
Hello Gustaf,

You will probably need to get the amp to a technician sooner or later. It is the older version of the gm-20. They all have problems with the soldering around the tube socket. I think you will be better of with another and newer amp where the problem is solved. You should be able to get a very nice one for €$1500-€2000.
  Reply With Quote
Old 25th August 2013, 05:07 PM   #3
diyAudio Member
Join Date: Sep 2010
Location: Thessaloniki
Hi Theo,

Do you happen to know the gain of the GM20 ?


  Reply With Quote
Old 2nd September 2013, 04:36 PM   #4
diyAudio Member
Join Date: Sep 2010
Location: Thessaloniki
Hi Theo,
Found this link that says gain is 27dB
Thanks anyway!
  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
Graaf 5050 stoN_Cold Tubes / Valves 1 6th May 2014 12:24 PM
Graaf GM20 mods - help! dpaws Tubes / Valves 29 13th August 2011 07:43 PM
Where can i find Pioneer gm-x624/gm-x524 manuals? gudrun Car Audio 1 22nd February 2007 02:01 AM

New To Site? Need Help?

All times are GMT. The time now is 09:47 PM.

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