C20 preamp variations

CarlV

Lunatic Member
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Posted by jackson on 10-09-2004 12:46 AM:
C20 preamp variations

Hello. I've got a C20 and I've noticed over the years that there are differnet types. Some have a center brass bar some don't. Some have a potted transformer etc. Which models are the older ones and which are newer ?

Here are a couple of a pictures of mine, it has no center bar and no potted transformer.

http://home.alltel.net/vaughndavis/mc3.JPG
http://home.alltel.net/vaughndavis/mc9.JPG

Thanks, Jackson


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Posted by ronflugelguy on 10-09-2004 07:56 AM:

I believe that's a later model. And does it have two preouts ?

__________________
Flugelhorns Rule!



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Posted by jackson on 10-09-2004 08:25 AM:

It has a main output, and a tape output that is at a fixed volume level. Doesn't have two mains with volume control if thats what you meen

Jackson


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Posted by ronflugelguy on 10-09-2004 08:40 AM:

There's a third version that has two preouts plus a tape out. The front looks like yours. I have a first version that has the brass bar across the front and only has the preot and tape out.

__________________
Flugelhorns Rule!



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Posted by VintageMac on 10-09-2004 02:01 PM:

This is my first post. I'm new to the McIntosh forum and really enjoying it!

The C20s did appear to be in three different versions.

The serial number sequences are:

1L001 to 5L817
6L001 to 8L379
100A1 to 329A2

You can probably tell if you have an "early" or "later" C20 by checking your serial number against these.

VintageMac


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Posted by dewickt on 10-09-2004 02:03 PM:

Three Versions
1- Brass bar down center of Plastic front panel (not glass).
2- Gold McIntosh logo and model painted on the front of the glass where the brass bar was in the first version .
3-All lettering is on the back side of the glass, is 5/16 inch taller than versions 1 and 2, has 2 sets of main outputs, most will have the potted transformer.

__________________
Terry
DeWick Repairs
www.mcintoshaudio.com



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