[MRCA] Sunday Night OMRN CW net

[Dennis DuVall]

I believe the Chinese got some along the way as well.

Dennis D.  W7QHO
Glendale, CA

****************



> On Mar 7, 2016, at 9:09 AM, Al Klase <ark at ar88.net> wrote:
> 
> 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.
> 
> <ciaeiccc.png>
> 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/ <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 <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 <mailto: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<Mail Attachment.jpeg>
>> 
>> 
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