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Meridian amp schematics ?
Meridian amp schematics ?
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Old 6th November 2005, 09:56 AM   #1
cs is offline cs  United Kingdom
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Default Meridian amp schematics ?

Does anyone have schematics of the early Meridian range of amplifiers, models 101, 103D and 105 ?

These are reputed to offer excellent sound quality, which is better than many modern designs.
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Old 1st February 2006, 07:47 AM   #2
traw is offline traw  United States
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Any luck finding schematics? I own a pair of 105's. Sound great. Problem is my pair is mismatched, each from a different iteration/generation. Power supplies pretty much identical, but one of the boards has a heatsink along botton and uses RCA transistors while the other relies solely on the case for heasinking and has motorola? transistors. Seems one amp is higher gain than the other... I see 2 potentiometers on the board. Curious is I could learn to bias them to same level. Or, somehow level match them. Shame because I love them, but the imbalance is noticeable and bothersome.
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Old 18th February 2006, 05:29 PM   #3
jovan is offline jovan  Yugoslavia
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..I have two Meridian 105 mono blocks, in a perfect condition. I am full satisfied with their sound, and with their aestethics too.
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Old 19th February 2006, 07:06 AM   #4
Leolabs is offline Leolabs  Malaysia
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Wonder is there anyone willing to "reverse engineer" the Meridians,so we can have a few schematics???
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Old 20th February 2006, 07:19 PM   #5
traw is offline traw  United States
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I took the cover off to refresh my memory... wish I had the patience to reverse engineer it into a schematic. half dozen small transistors with some having a star heatsink. A definitely hand made appearance to the pcbs - some jumper lines on topside with components and curvy lined etched traces below. Wonder what a 103 looks like inside... a quick check on voltage rails shows it's +/-52
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Old 4th March 2006, 03:05 PM   #6
bluetomgold is offline bluetomgold  United Kingdom
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Contact meridian by phone. They're very good at supplying schematics. Normally free of charge.
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Old 26th March 2006, 01:14 AM   #7
Buzzwell is offline Buzzwell  Canada
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Default Meridian Schematics

Hi CS,

Did you get the schematics you were looking for? I emailed Boothroyd Stewart and they sent me a photocopy of the schematics for my amps. To tell you the truth I can't remember the model number but they are the two piece 100watt mono amps (brown colour). I'm at work right now, but when I get home I'l see if I can find the schematic and fax it or email it if I can get it scanned.

buzzwell
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Old 26th March 2006, 01:21 AM   #8
Zen Mod is offline Zen Mod  Serbia
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Meridian amp schematics ?
if you scan it,you can mail it to me ,too........
chokyATneobee.net
TIA
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Old 26th March 2006, 06:23 AM   #9
traw is offline traw  United States
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Yeah, i'd like to have copy of that too. I emailed meridian as well but haven't received response. Maybe like mentioned above, I should call.
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Old 28th March 2006, 10:39 PM   #10
Buzzwell is offline Buzzwell  Canada
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Default Meridian 105

I have a pair of 105s and I believe, I am having trouble with the bias as well. One of them heats up and after a soft pop, cuts out until it cools down again and kicks back in.
I have a schematic but not the knowledge to use it. I have just sent them in to a shop here in Vancouver to see if they can set them up. Mine have the heat sinks on the bottom (of both) as well. They have a number on paper tag on the bottom 1689 A and B. I have had them for about 15 years I would guess.
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