N_Cook wrote:
N_Cook wrote in message
...
boardjunkie wrote in message
...
On Nov 23, 11:10 am, "N_Cook" wrote:
What would normal variation in volume be between channel A and channel B
operation ? Between classic and ultra gain for a given pickup source,
for
a
given gain and volume setting on channel A of say 6, would give about
the
same output seitching to the B channel controls set at what sort of
numbers?
I had one-a those in for repair a while back and noticed the output
level was less on one ch than the other at the same master settings.
Couldn't find anything at fault so I assume its just the design. Don't
mean it makes sense tho.....I thought it was strange.

The "classic" channel always seem to have less overall gain but the amp in
front of me is about 3 to 1 down. Amp is new to the owner and concerned
about it but he is not familiar with it or similar. All valves check out
fine as does anything else in the chA section that could be normally
problematic. Dis find 2 bad solder points in the power supply but no
intermittent noises/distortion reported so that would have been a future
problem but not causing marked gain difference.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/



correction, about 2 to 1 down , going by the numbering around the knobs

The 'ultra gain' channel is louder, it`s intended to be. The clue is in
the name of the channel. On my MG50 channel two sounds way louder for
the same input settings, part of that is more gain and part is due to
the dirtier sound.

Ron(UK)