[ARC5] FW: Way OT -- SX-28

[kn7sfz]

Copied the following online.

Richard kn7sfz


Adding feedback to a 2nd IF stage to improve selectivity was sometimes
used with the surplus "ARC-5" (vacuum tube) receivers in the 1950's and
1960's. One such approach was described in QST magazine (March 1960) by
Lewis McCoy W1ICP "A Poor Man's Q Multiplier", available to ARRL members
at arrl.org in the QST archives. McCoy indicated this improved
selectivity considerably in the ARC-5 BC-454 (3-6 mhz tuning range; 1415
khz IF) and ARC-5 BC-455 (6-9.1 mhz tuning range; 2830 khz IF).

Mike N4MWP






On 8/6/2021 8:43 PM, Phillip Carpenter wrote:
> Hue,
>
> Well, your going to have to locate the article.
>
> I did a search within 73 magazine with no match for the title you gave.
>
> Phillip
>
> Sent from my iPhone
>
>> On Aug 6, 2021, at 11:15 PM, Hubert Miller<Kargo_cult at msn.com>  wrote:
>>
>> No, there's a mixup here. QST would never publish a Command Sets conversion article like the one I am thinking of.
>> I'm pretty sure about the title, which referred to paired sets to make a 'luggable' or mobile system.
>> -Hue
>>
>>> Hue,
>> That article was published in QST of March 1960, called “A Poor Man’s Q Multiplier” by SK Lew McCoy, W1ICP.
>> Respectfully,
>> Phillip WB4PAC
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