Heath A9 amplifiers

[Fred]

I normally am interested in Heath Ham gear but the postings on the A9 series amplifiers made me pull one I have out.  What are the differences between the A,B, and C versions.  I thought I remembered a version with a gold chassis the same color as the W5.  I found an original book for the A9C and it shows one of the filter caps in series with bleeder resistors across them.  The one I have doesn't use this setup and looks totally original underneath. 
I found the one I own has had a pilot lamp mounted through the center chassis hole which was normally covered with the control plate #205-M20F161.  Unfortunately, the model number of the amp on the plate was damaged when someone drilled a hole through it so I am not sure which version I have.  Mine has a grey chassis.  This brings me back to the question: Would anyone on this list have a control plate they would like to sell?

Thanks,

Fred
WA3KIO

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