[ARC5] [Milsurplus] SCR-287 (BC-375 & BC-348) WW II Operational Question

[Dennis Monticelli]

I have a regular 80M morning sked with a friend in the Sierra Nevada
mountains.  I am located in the San Francisco Bay area.  My rig is a CMS
suitcase spy set.  It puts out about 5 watts and because the osc runs
continuously during TX, a backwave as well.  I measured the backwave at
1.6mW.  My friend can often copy the backwave.  Distance about 200 mi.
Full size dipoles at both ends.  Under the right conditions, it doesn't
take much.

Dennis AE6C



On Fri, Oct 3, 2025 at 8:23 PM Hubert Miller <kargo_cult at msn.com> wrote:

>
>
>
>
> Sent from my Galaxy
>
>
> -------- Original message --------
> From: Bill Cromwell
> Date: 10/3/25 15:39 (GMT-08:00)
> To: Hubert Miller
>
> >Once upon a time when I was active the Navy-Marine Corps MARS system one
> of our members used an LM or 221 (don't remember which) as  CW transmitter
> by keying the antenna feed line. It was not the very best of armchair copy
> but the people he needed to contact heard him with no fills. I was logged
> into that net session and heard him well enough to copy. We were all in the
> state of Michigan and not hundreds or thousands of miles apart and the
> frequency was just above 4 MC.
> Bill  KU8H
> >Michigan QRP Club  M-1778
>
> Bill, how did that fellow match the presumably low Z antenna to the high Z
> connection on the freq meter ?
> "QRPP ! "
> -Hue Miller
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