On Thu, 25 Mar 2004 21:08:23 GMT, (Rich) wrote:

I found an EH Scott SLR-12-B (Navy? 'morale') receiver
(550kc-16Mc) for sale. I would like to know what ($) to offer for it
presuming good working condition. I have not been able to find much
information about this set on the internet. If you know of any EH
Scott BA resources I would appreciate if you share them with me. TIA!

There's a few pics and schematics here
http://www.schroeder-dieball.com/scottradiolabs/
but not a lot on the merchant marine sets.

regards,
Ron Hershey

In article , Ron Hershey
writes:

There's a few pics and schematics here
http://www.schroeder-dieball.com/scottradiolabs/
but not a lot on the merchant marine sets.

Beautiful photos, of sets clear back to the 201-A days, and later ones with
more chrome than a '58 Olds.

The RCH entry is a single photo of the same radio I have, with a Hammarlund or
SX-28 style dial. I believe "RCH" is also used for a slide-rule dial type
Scott.

My RCH is probably a backup comm rx, not a morale entertainment set, since it
unfortunately sacrifices the AM BC band to include two LW bands, as for marine
communications. It does provide for feeding a second audio source into its
output stage; unclear what that was used for. The audio output is a single 6F6
or 6V6 or the like, so this RX would not be driving speakers all over the ship.
73, Mike K.

Oscar loves trash, but hates Spam! Delete him to reply to me.

Hi,

My RCH is probably a backup comm rx, not a morale entertainment set, since it
unfortunately sacrifices the AM BC band to include two LW bands, as for marine
communications. It does provide for feeding a second audio source into its
output stage; unclear what that was used for. The audio output is a single 6F6
or 6V6 or the like, so this RX would not be driving speakers all over the ship.
73, Mike K.

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)

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.

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.

73, Alan

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

Oscar loves trash, but hates Spam! Delete him to reply to me.

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