[Collins] 75A-2 new to me

[jrhallas at optonline.net]

The 75A2 had a 455 kHz IF, while the 51J (and I believe the 75A1?) had 500
kHz IF. At least my 51J4 does, and I would think the earlier as well. So
the kits might have been common otherwise, but would need different center
frequency filters.

73, Joel, W1ZR

Original Message:
-----------------
From: Dr.Gerald Johnson geraldj at ispwest.com
Date: Wed, 09 Feb 2005 22:26:45 -0600
To: wa9vrh at mtco.com, Collins at mailman.qth.net
Subject: Re: [Collins] 75A-2 new to me


All I know about the 75A2A was that a local ham, W0PFP had one. Though 
when we went through his stuff cleaning it out after he died last year I 
didn't see the A2A with mechanical filters. Just a plain A2. I got his gray 
panel 51J3.

It's conceivable that the 51J and 75A2 could have used the same filter kit, 
but that documentation on the filter kit should have said so. I think the 
filter kit for the A2 probably included a new A2A escutcheon.

73, Jerry, K0CQ, Technical Advisor to the CRA

-- 
Entire content copyright Dr. Gerald N. Johnson, electrical engineer.
Reproduction by permission only.




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