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Mark Humphrey
Copper Member
USA
2 Posts |
 Posted - 12/29/2009 : 21:12:11
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Hi,
Working on an MD-2 and Q23 is missing. (Buffer) I need the value of this if anyone could provide this please. It's not shown on my schematic, also I'm aware of others I can use, but this customer is dead set on the exact factory spec/part.
Thanks in advance,
MH
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zerksies
Double Platinum Member
USA
3406 Posts |
Posted - 12/29/2009 : 21:41:32
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| welcome to the forum |
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Scarymonsta
Bronze Member
United Kingdom
90 Posts |
Posted - 12/30/2009 : 00:14:14
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Hi MH
Q23 = 2SC2458-GR
Cheers
Chris |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 12/30/2009 : 01:25:52
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quote:
Originally posted by Mark Humphrey
Hi,
Working on an MD-2 and Q23 is missing. (Buffer) I need the value of this if anyone could provide this please. It's not shown on my schematic, also I'm aware of others I can use, but this customer is dead set on the exact factory spec/part.
Thanks in advance,
MH
Hi Mark Humphrey
Welcome to the forum from Australia.
Can I ask why Q23 was missing?
Did you get it faulty, or was it some kind of incomplete mod?
I don't have the MD-2 service notes, so assuming Q23 is the output buffer.
You should be able to replace it with any low noise general purpose audio grade transistor.
It's just a simple low impedance out emitter follower.
Regards Dr. Bob  |
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Mark Humphrey
Copper Member
USA
2 Posts |
Posted - 12/30/2009 : 09:19:36
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quote:
Originally posted by Dr. Bob
quote:
Originally posted by Mark Humphrey
Hi,
Hi Mark Humphrey
Welcome to the forum from Australia.
Can I ask why Q23 was missing?
Did you get it faulty, or was it some kind of incomplete mod?
I don't have the MD-2 service notes, so assuming Q23 is the output buffer.
You should be able to replace it with any low noise general purpose audio grade transistor.
It's just a simple low impedance out emitter follower.
Regards Dr. Bob
Thanks for the warm welcome Dr. Bob, and also to the fella who gave me the part #.
It's a rescue after an attempted mod in which Q23 was removed in favor of a jumper wire somehow. The guy wants me to get it back to stock and working again.
It's not anymore interesting than that I'm afraid.
Thanks,
MH
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 12/30/2009 : 13:45:21
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Hi Mark
From your registration info, I see you are Mark Humphrey from
Humphrey Audio & pedal mods.
Regards Dr. Bob
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Alice
Bronze Member
USA
66 Posts |
Posted - 01/03/2010 : 08:26:25
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Just out of curiosity, was he trying a known mod or was he experimenting and making up his own?
Just wondering because I've haven't heard of any MD-2 mods yet or seen any offered on mod sites.
-A |
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Topic |
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Need MD-2 Q23 value please
