[ARC5] [Milsurplus] SCR-183 Frequency Coverage

[jmfranke]

Almost all the receivers I have or have seen, and I have a dozen, have a
frequency chart on the tube cover. The frequency span is 146 kHz to 12.7 MHz
with no gaps, see attached Chart MC-401 from a BC-AS-229. Chart MC-231, from
a BC-AO-229, is the same except the first digit after the "C-" is a 3
instead of a 4. For example C-438 versus C-338. Note there are some tuning
units not listed, C-377 for example.  I have included a chart of known
receiver tuning units.

Also note, C-444 and C-344 cover the AM broadcast band.

I have also enclosed a images of a coil shipping box containing a C-377 coil
and the C-377 itself that goes to 7.85 MHz, which is higher than 7.7 MHz.

John WA4WDL

The images and charts were sent to David and Kludge

--------------------------------------------------
From: "Kludge" <wh7hg.hi at gmail.com>
Sent: Wednesday, August 17, 2011 6:39 PM
To: "'David Stinson'" <arc5 at ix.netcom.com>; <milsurplus at mailman.qth.net>; 
"'ARC-5 List'" <arc5 at mailman.qth.net>
Subject: Re: [Milsurplus] [ARC5] SCR-183 Frequency Coverage

> -----Original Message-----
> From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] 
> On
> Behalf Of David Stinson
>> Someone was discussing Army SCR-183 (not Navy GF/RU)
>> frequency coverage and possible non-standard coils.
>> Any -183 transmitter coil outside 2500-7700 KC or
>> crystal-control coil for other than 4495 KC is non-standard.
>> Any -183 receiver coil outside 200-7700 KC is non-standard.
>> I'd very much like to see some photos
>> of the nomen plates of such coils.
>
> Dave, the original mention of these coils was in this message:
>
> -----Original Message-----
> From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] 
> On
> Behalf Of PHIL
>> The complete coil set went from !50kc to 12.7mcs
>> I think I have seen one broadcast band coil ?
>
> This range seems excessive from all I know about these sets but if this is
> accurate, I also want to know.  At the same time, I'd like to get the 
> range
> of one complete set of coils from each group of compatible plus what made
> one group of compatible sets incompatible with others.
>
> Does that make any sense?
>
> Best regards,
>
> Michael, WH7HG ex-K3MXO, ex-KN3MXO, WPE3ARS, BL01xh ex-Mensa A&P PP BGI
> I am me.  I'm the only one who's qualified.
> http://www.nationalmssociety.org/chapters/NTH/index.aspx
> http://wh7hg.blogspot.com/
> http://kludges-other-blog.blogspot.com
> Hiki Nô!
>
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