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 Post subject: Harman Kardon A-3
PostPosted: Oct Wed 17, 2018 11:08 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 10913
Location: Latham NY
Got one of these amps but I can't find anything much in the way of a schematic on it out there. It seems to be rather rare, lots on the A300, very similar but I don't what the differences are between the 2 models.


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 Post subject: Re: Harman Kardon A-3
PostPosted: Oct Thu 18, 2018 3:02 pm 
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Location: Rochester NY USA
The A300 didn't make it into Sams, so I can't tell you what the transformer numbers are. But if the transformers are the same as the A300, the power amplifier section has to be pretty much the same.

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 Post subject: Re: Harman Kardon A-3
PostPosted: Oct Fri 26, 2018 2:31 am 
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Location: New York City, New York
Is it one of the XAM Mark IV or Churchill branded amps?

Chassis A-3 was how Harman Kardon marked those chassis. They are A300’s.

I also think (but I’m going from memory here) the A30-K (Kit version of the A300) may also be marked A-3. But I’ll have to dig one out to see. If your amp isn’t one of the above- please let is know what it is. I’m very curious if there is another variation out there.


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 Post subject: Re: Harman Kardon A-3
PostPosted: Oct Fri 26, 2018 1:19 pm 
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Location: Latham NY
I feel a little embarrassed, on the back has A-3 but right on the front panel it has A-300 :oops: I don't think it was a kit as the tube sockets and other parts are riveted. I brought it up slowly on the variac, nice sounding 6V6 amp even with the original 7408's that test a little on the weak side.


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