[Collins] Collins 75A4 Serial #1560

[Dr. Gerald N. Johnson]

Rod Blocksom's 75A survey says your receiver was manufactured in
November or December 1955. collinsradio.org/archives/manuals/75Asur.pdf

You can confirm that by looking for date codes on capacitors, crystals,
and original tubes, maybe mechanical filters. Some used a 4 digit date
code often two digits year and two digits week of the year.

73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association

On 7/2/2014 12:18 PM, John King via Collins wrote:
> I have Collins 75A4 with the serial number  1560. I am curious if the
> year of manufacture can be determined by that serial number. In
> addition, I would like to know if any previous owners of Serial
> number 1560 can be learned or determined. I have a 75A4 manual but I
> am not positive that it came with my 75A4. I have seen where there
> was probably 5,000 or 6,000 plus manufactured.
>
> At any rate, if a prior owner of Collins 75A4 Serial # 1560 sees this
> or is known, I would like to get to know them if they are still
> living. Any assistance will be greatly appreciated. Thanks and 73,
> John, K5PGW
>