In article , Alan Douglas
adouglasatgis.net writes:

You can see one installed in a Mackay communications console in the
4th ed. of THe Radio Manual by Sterling & Monroe, 1950. Pages 511 to
553 are devoted to this console, including a fold-out schematic of the
Scott receiver itself (called an SLR-F). It was paired with a Mackay
128AV (15 - 650kHz, battery-powered)

Does this mean the RCH served as the audio output stage for the Mackay? I can
imagine a lot of military rx wer made with only "line level" or "diode load"
outputs, meant to feed RTTY decoders and the like, and the RCH wuld provide a
speaker audio driver for such rx.

Scott made a big deal of low-radiation receivers and German
direction-finding, but it's far more likely that the low radiation was
only to avoid interference with other receivers on the ship. It's a
very crowded RF environment.

True, and this is why the R390 series has such a rugged multi-tuned front end,
and well into the sorry-state era was specified for shipboard use because it
could stand up to the onboard transmitters.

I had an SLR12 once and its dial-drive mechanism was sluggish, not
a set you'd want for band-cruising. They were after all meant to be
left in one position and not re-tuned often. The geared dial on an
RCH works like a dream, in comparison.

Right, the RCH tuning is silky smooth. Too bad Scott didn't put a vernier
0-100 readout on the knob shaft for ease in returning to a station, although
the 0-200 logging scale is better than nothing. I suspect some ops may have
put a 0-100 skirted knob on that shaft and scribed an index mark on the front
panel.

Since the RCH has a BFO with pitch control, I tend to believe it was for backup
comm rather than entertainment. Lack of xtal filter makes it only a backup for
CW.


Tnx fer the commentary, Alan. 73, Mike K. AA1UK

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Hi,

You can see one installed in a Mackay communications console in the
4th ed. of THe Radio Manual by Sterling & Monroe, 1950. Pages 511 to
553 are devoted to this console, including a fold-out schematic of the
Scott receiver itself (called an SLR-F). It was paired with a Mackay
128AV (15 - 650kHz, battery-powered)

Does this mean the RCH served as the audio output stage for the Mackay? I can
imagine a lot of military rx wer made with only "line level" or "diode load"
outputs, meant to feed RTTY decoders and the like, and the RCH wuld provide a
speaker audio driver for such rx.

If I'm reading the text correctly, position 2 was not used, but the
"Mixed" mode fed time signals to check the chronometer.

73, Alan