[MRCA] Sunday Night OMRN CW net

[Al Klase]

Ray,

You are correct.  The original sets, bearing the RCA MI-8751 
designation, were produced for Sweden, but got headed off by the Signal 
Corps.  These are pained grey, have a two-piece front panel, and RCA 
"meatballs."  The cases are lighter than the later productions BC-474.  
Bother versions are designated P/O SCR-288.


The N3FRQ Collection

If you look closely, you'll see there were mods to add a second 
headphone jack, and change the mic connector to make Ft. Monmouth happy.

The SCR-284, like a camel,  was a horse designed by a committee. The 
ultimate answer was the SCR-294 that begat the beloved AN/GRC-9.

See the attached poster from the Radio technology Museum for more info.

Al

Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/

On 3/7/2016 11:33 AM, Ray Fantini wrote:
>
> The BC-474/ SCR-288 was never up to US Mill Spec especially when 
> compared to radios like the BC-654/ SCR-284 and  I think the radio was 
> originally designed for a forging government and in the US government 
> bought it being they were buying anything that was available at the 
> time but that’s just speculation by me.  I would assume that it was 
> never intended for use as anything beyond a training set, but that 
> being said don’t get me wrong in that looking at the design have to 
> propose that unlike much of the exceedingly heavy designs that 
> occurred in Mill spec radios of the time the little 474 with its AVR 
> receiver and simple plate modulated transmitter is just about what I 
> would say is a perfect example of what you would get if it were 
> designed by and manufactured by Hams?
>
> Ray F/KA3EKH
>
> *From:*MRCA [mailto:mrca-bounces at mailman.qth.net] *On Behalf Of *B. Smith
> *Sent:* Sunday, March 06, 2016 9:54 PM
> *To:* mrca at mailman.qth.net
> *Subject:* [MRCA] Sunday Night OMRN CW net
>
> Excellent condx tonight on 3570 with Ted W3PWW  NCS. Nice collection 
> of chirps and clicks and some drifting in frequency.   I enjoyed the 
> "shave and a haircut" just prior to the net.  My rig for the evening 
> was a BC-474 (on the bench) powered by  home brew 12 volt switching 
> supply and running 4 watts. Working on details on a web page. Learned 
> something tonight that I had forgotten, when using a older receiver 
> that is not "single signal" when you hear QRM it is possible to tune 
> to the other side of center frequency to reduce the interference.  
> Everyone should tune in on Sunday night at 21:00 hours local time just 
> to hear the different signals.
> Z
>
> Z
>
>
>
> ______________________________________________________________
> MRCA mailing list
> Home: http://mailman.qth.net/mailman/listinfo/mrca
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:MRCA at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/mrca/attachments/20160307/9e8a6225/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: ciaeiccc.png
Type: image/png
Size: 991407 bytes
Desc: not available
URL: <http://mailman.qth.net/pipermail/mrca/attachments/20160307/9e8a6225/attachment-0002.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 102634 bytes
Desc: not available
URL: <http://mailman.qth.net/pipermail/mrca/attachments/20160307/9e8a6225/attachment-0001.jpe>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Man-Pack lores.png
Type: image/png
Size: 4643430 bytes
Desc: not available
URL: <http://mailman.qth.net/pipermail/mrca/attachments/20160307/9e8a6225/attachment-0003.png>