Noise Problem

ToneForDays · Joined: 22 Mar 2007 Posts: 1 See this user's pet

Hi Guys!
I own two VL-1002's ...they are awesome amps.
One is very quiet and one has considerabe ac noise when it is on, even if all the knobs are down. Have tried to adjust the hum balance but the problem is still there.

Any Ideas or secrets?

Thanks!

Desperate In Cali'

henryh · Joined: 06 Sep 2007 Posts: 47 See this user's pet

mine too

BM · Joined: 07 Jun 2007 Posts: 45 See this user's pet

me as too, and it is also present in my 50 watt JCM800 4104 2X12 combo... :-(

pazman6 · Joined: 04 Mar 2007 Posts: 10 See this user's pet

Same for me. Mine does not hum when the attenuator is turned down, so I am going to look at the amp and schematic and see if there is a bad cap or ground issue around the attenutaor circuit.

HERCULEES1 · Joined: 05 Aug 2008 Posts: 3 See this user's pet

SAME ISSUE HERE....
checked power supply caps using capacitor checker and they read within specified values

not sure what it could be
hums with all volumes off

and an external preamp in the effects return even

huntermb · Joined: 22 Jan 2007 Posts: 5 See this user's pet

What worked for me is I went in and resoldered all the connections for the tube sockets etc. I found that some of the joints had gone cold/crystalized over time. I also highly suggest the mods that Lee has in his video for these amps.

HERCULEES1 · Joined: 05 Aug 2008 Posts: 3 See this user's pet

iVE DONE THE MODS , THEY DIDNT FIX ANYTHING to do with hum and noise
Ive taken the preamp and power boards physically out of the amp (major work ) and reflowed as much as possible especially tube sockets , no difference

wish i had an answer

Lee Jackson Metaltronix Amplifiers

Noise Problem