[ARC5] Product detectors - the name.

[Dennis Monticelli]

According to Osterman's book, the 75A-4 was introduced in 1958 and the
NC-109 was introduced in 1957.

Dennis AE6C

On Thu, May 11, 2017 at 3:03 PM, Kenneth G. Gordon <kgordon2006 at frontier.com
> wrote:

> On 11 May 2017 at 14:27, K5MYJ wrote:
>
> > I just checked the manuals for the Collins 75A-3 and 75A-4.
> >
> > The 75A-3 was sold as an AM/CW/FM receiver. The 75A-4 was sold as an
> AM/SSB/CW receiver.
> >
> > The 75A-3 did not have what we now call a product detector.
> >
> > The 75A-4 had both diode(AM) and product(SSB/CW) detectors.
> >
> > To me the 75A-4 is the first receiver I know of to be designed for SSB.
>
> Did that pre-date the National NC-109?
>
> Ken W7EKB
>
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