Hello Steve,Welcome to the forum Dave.
It's normal to get more hiss when in High Range as it has more gain but it shouldn't give more buzz. That could be something different.
The buzz discussed in this thread is not signal path related and is constant in level. It is caused by the mains transformer laminations resonating against the chassis. This issue was addressed from the beginning of 2008 in production but it is easy to retrofit the aluminium spacer between the transformer and chassis on units made before this date.
Remove the rear grille and visually check to see if the aluminium spacer is there or not (It's quite easy to see; it's like an extra lamination between the mains transformer and the chassis). From your serial number it's probably not but just check.
If it's not there, then try pressing the chassis near the transformer to see if the buzz changes tone or even reduces or disappears.
Let me know what you find.
woh, it does goes away ...still audible but not as loud. The tranny and the base plate looks as it's one piece, no evidence of aluminum in between both tranny. Do I have to bring it to a tech or this is an easy fix I can do myself, I'm good with tools etc, instructions?
The other hiss/buzzing (at high vol on my amp) are the same thing (same settings as mine) on my friends newer 50 watt head when the dynamic range/high gain is pushed in. I guess that they are all the same due to high gain?!.
What I've been doing is running a noise gate in the loop on at all times; Kelley TS9 and Hao Rumble mod in front of amp (for boost/high gain) ; dr/mb push out, detail-4 o'clock, body 1 o'clock and volume at 1 o'clock in live set-up (in door or out door), I find these settings/sweet spot for my guitar-very pleasing to my ear and to be short, works for me with out the loud audible hiss when DR pushed in (it's off at all times). I don't even use my foot switch any more. I just hope i can use it in live application the only function is at home when practicing at low volume
Just a suggestion:
I wonder if we can do something about it? maybe maybe not? better/high end capacitor on that circuit maybe? I would definitely pay for it if fix is available that you know off even though I hate to part with my amp
I hope I'm making sense to you and please let me know?
My current rig;
I was going to buy another head at my local GC, but the issue is still present. Maybe I'll wait until the issue is resolved :violin
Your response is greatly appreciated! MARSHALL AMPS ALL THE WAY :rocker
Kind regards,
Dave
VM-50-2266 M-2007-30-1138-2 RoHS