Re: {Collins} 75A-4 / universal product detector



It came out March or April 1958 (or near there) There is an article in the April 1958 QST about using it in the 75A

So... When did the A-4 show up?

73's

Dave WA3HSC

---------- Original Message ----------
From: "Steve Darveniza" <stevedz@xxxxxxxxxxxxxxx>
To: <collins@xxxxxxxxxxxxx>
Subject: {Collins} 75A-4  / universal product detector
Date: Wed, 23 Mar 2011 13:22:08 +1100

Hi All, which came first? the product detector built in to the Collins 75A-4 or the Universal Radio Service of Ohio product detector for the 75A-2/3?
Best 73 from Steve VK4VN
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