Marshall DSL50 chA/chB output levels

N

N_Cook

Guest
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?
 
On Nov 23, 11:10 am, "N_Cook" <dive...@tcp.co.uk> 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?
Click to expand...
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.
 
boardjunkie <boardjunkie@techie.com> wrote in message
news:8474e641-fd48-430b-9434-fca608a988b6@c1g2000yqg.googlegroups.com...
On Nov 23, 11:10 am, "N_Cook" <dive...@tcp.co.uk> 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?
Click to expand...
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/
 
N_Cook <diverse@tcp.co.uk> wrote in message
news:ggdn4e$189$1@news.motzarella.org...
boardjunkie <boardjunkie@techie.com> wrote in message
news:8474e641-fd48-430b-9434-fca608a988b6@c1g2000yqg.googlegroups.com...
On Nov 23, 11:10 am, "N_Cook" <dive...@tcp.co.uk> 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/
Click to expand...
correction, about 2 to 1 down , going by the numbering around the knobs
 
N_Cook wrote:
N_Cook <diverse@tcp.co.uk> wrote in message
news:ggdn4e$189$1@news.motzarella.org...
boardjunkie <boardjunkie@techie.com> wrote in message
news:8474e641-fd48-430b-9434-fca608a988b6@c1g2000yqg.googlegroups.com...
On Nov 23, 11:10 am, "N_Cook" <dive...@tcp.co.uk> 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
Click to expand...
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)
 
Ron Johnson <ron@lunevalleyaudio.com> wrote in message
news:c-idnRDI6Z11TbfUnZ2dnUVZ8sLinZ2d@bt.com...
N_Cook wrote:
N_Cook <diverse@tcp.co.uk> wrote in message
news:ggdn4e$189$1@news.motzarella.org...
boardjunkie <boardjunkie@techie.com> wrote in message

news:8474e641-fd48-430b-9434-fca608a988b6@c1g2000yqg.googlegroups.com...
On Nov 23, 11:10 am, "N_Cook" <dive...@tcp.co.uk> 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)
Click to expand...
I agree it should be like that but cannot find any manufacturer's data or
ucen user experience .
New and inexperienced owner was of the opinion it is a fault, I know its
always A less overall output than B setting for setting ( on the few I've
repaired} but I cannot find any specific data to quantify/check it. Did find
2 bad solder joints, unrelated, that would have soon made their presence
felt, having a good root around to find the "fault".


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

I agree it should be like that but cannot find any manufacturer's data or
ucen user experience .
Click to expand...
For what it's worth, mine sounds about the same on both channels. The
different certainly isn't significant enough to matter.
 
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