[R-390] Unobtainium SSB parts

[Larry H]

Thank you, Jacques.  I've been looking for this.  Here's a link to the
online pdf for the issue:

07 July 1974.pdf (archive.org)
<https://ia903006.us.archive.org/12/items/hamradiomag/ham_radio_magazine/Ham%20Radio%20Magazine%201974/07%20July%201974.pdf>


Regards, Larry

On Fri, Jul 8, 2022 at 7:07 AM Jacques Fortin <jacques.f at videotron.ca>
wrote:

> Perry,
>
> If it was the relay used by W7DI (in a variant of the Capt. Paul Lee W3JHR
> product detector), the following one can be used instead:
>
>
> https://www.digikey.ca/en/products/detail/te-connectivity-potter-brumfield-relays/TSC-124D3H-000/1128733?s=N4IgTCBcDaICoGUDCBaAjGALAEQMwAkAaABlJAF0BfIA
>
> Or any other relay with the same specifications (especially the coil
> resistance and coil to contacts dielectric strength).
> The trick is to replace R531 with the relay coil (See the W7DI article,
> Ham Radio, July 1974)
> When the BFO will be powered, the relay will activate and change the audio
> source from the AM demodulator to the product detector output.
>
> 73, Jacques, VE2JFE in Montreal
>
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