[ARC5] RAX If Frequency

[Christopher Bowne]

I recall while passing through Chatham MA on Cape Cod one winter night in 1996, hearing the VVVs of coastal station WCC, apparently a second harmonic from its LF transmitter operating in the vicinity of 440 kHz, beating against the 880 kHz carrier frequency. of WCBS from NYC, which I was listening to on the car radio.  The WCC LF transmitter and its single tower antenna was located very close to the beach in South Chatham.  It was the last time I ever heard WCC, which went dark not long afterwards.

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> On Feb 15, 2022, at 15:06, Hubert Miller <Kargo_cult at msn.com> wrote:
> 
> I will guess the 456/2 BFO of the GRC-9 was for stability  and/or  anti-pulling. The RU receiver also uses BFO at F/2.
> This doesn't seem very common, though. I don't recall the BC-1306 manual mentioning such. 
> I noticed some Japanese receivers that tune up to about 6 MHz use an IF around 750 kHz. There are a couple Japanese
> comm receivers including the "HRO type" that use plug-in IF coils to change the IF for the low or high range tuning coils.
> The Squires-Sanders SSR-1 ham bands and SSIBS shortwave broadcast use a 1000 kHz IF and interestingly, derive their
> AM selectivity entirely from high-Q IFs at this frequency. Someone told me this rec. is difficult to work on out of its 
> cabinet because the 1000 kHz MW broadcast stations are received well.
> I recall years ago, probably the early 1980s, on a vacation up to the San Juan islands north of Seattle, using a transistor
> broadcast radio, I heard unmistakable CW loud in the background. Apparently some merchant vessel on the 600 meter
> band. I have never seen any transistor entertainment radio with a 500 kHz blocking circuit, but this was not uncommon
> in the better radios of the tube era.
> -Hue Miller 
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