[ARC5] Way OT -- SX-28

[Richard Knoppow]

   It may have been partly that the Super Pro was frequency 
limited. The standard one that had the broadcast band went only 
to 20Mhz, a second model went from 1250Khz to 40Mhz. It had a 
different arrangement for the RF stages giving higer Q and better 
image rejection but the SX-28 would have given the convenience of 
a single model for all applications.
    There was also difference in price; the Super Pro was 
significantly more expensive.

On 8/4/2021 1:14 PM, Hubert Miller wrote:
> I wonder if the deciding factor was that Hammarlund, altho the better product,
> used a separate power supply. It looks to me like the Army used the Hammarlund
> product almost exclusively. The FBIS and FCC also used Hammarlund, but it seems
> to be a lesser degree. It would be harder to have a wall of Hammarlunds with their
> external supplies too. I once asked Jim Barrows, W7BCQ SK, why the one or the
> other choice at the FBIS. He said he really didn't know.
> You may remember some time back I posted to the Milsurplus group the photo of
> the Hallicrafters SSR-202 system, which incorporated a McLaughlin Sideband Selector
> together with an SX-28 in a large metal desk. This system was actually "secret" during
> WW2, but who knows why. The McLaughlin device was about a 4 inch tall panel that
> sat under the SX-28. I believe a very few of the McLaughlin things survived but zero
> of the metal desk assembly, I suppose because they were heavy and unwieldy and
> didn't much appeal to surplus dealers or the surplus buyers. I wonder if I have the
> only SSR-202 manual around. This info should really be in that compilation book on
> communications receivers. I told Bob Nickels that I didn't expect there would ever
> be another edition of this book, and on taking my first look at it, I saw there were
> about 6 receivers I could think of that didn't appear in it. My idea is we "crowdsource"
> our own update pages, sized to be 3-hole punched and put in a binder as an
> addendum.
> -Hue Miller
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: https://www.qsl.net/donate.html

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL