[ARC5] Product detectors - the name.

[Dennis Monticelli]

My error.  Read it too quickly and read it wrong.  Osterman 3rd edition
reports it ended being sold in 1958. It started in 1955 as others have
correctly reported.

Dennis AE6C

On Thu, May 11, 2017 at 5:30 PM, George Babits <gbabits at custertel.net>
wrote:

> Well Osterman is wrong if he says 1958.  I checked  the 2nd edition of
> Moore's "Communications Receivers" and it says 1955.   The 75A-4 shows up
> in the 1955 ARRL Handbook too.
>
> 73,
> George
> W7HDL
>
>
> ----- Original Message ----- From: "Dennis Monticelli" <
> dennis.monticelli at gmail.com>
> To: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
> Cc: "ARC-5 Maillist" <Arc5 at mailman.qth.net>
> Sent: Thursday, May 11, 2017 4:53 PM
> Subject: Re: [ARC5] Product detectors - the name.
>
>
> 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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>>
>
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