[ARC5] More SCR-183 Trivia

[Kludge]

-----Original Message-----
From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On
Behalf Of Mike Morrow
> The BC-AD-219 went to the SCR-AB-183.  Logical!

Well, yeah.  Makes sense to me.  :-)

> That's from the funny and confusing era of SCR-A*-183 nomenclature and
> contract dates.  I wonder how many units of the following still survive:

I need to check the dates against the Airmail Disaster of 1934 plus see if
there are any hints as to when and why there was a major corporate
rearrangement that put ARC at the top of the food chain.

> I doubt there was very much difference between any of these five
> receivers, except maybe the loop antenna connections (posts or plug).

The BC-AA-179 was like the GF receiver.  That design was different at least
from the BC-A*-229 but I don't know about the 'tweeners.  This is part of
why I want the schematics and parts lists for these systems.  It's also a
good excuse to find a cute RA to help me ... ;-)

> At least for the AE variation and later, the numbers stopped changing.

*nod* ... stability at last.  Kinda sorta.

> My manual for the SCR-AG-183 says that the BC-AG-229 was supplied as
> the receiving equipment for the SCR-AC-187 liaison set.  There's no
> mention of the BC-A?-183 heterodyne oscillator, nor any diagrams or
> other details of the SCR-AC-187.  The contract date is 11-25-1935.

My BC-**-183 is a BQ or some such weirdness and I think Dave's is another
letter pair that doesn't begin with A.  According to the manual it was used
as a heterodyne oscillator and as a frequency meter/signal generator kind of
like the BC-221 & LM only not as precise.  In the B-15 picture, I think it's
used in the latter role since there's another box attached to the liaison
BC-AG-229 (assuming this isn't an SCR-185 instead) probably fulfills the
heterodyne oscillator (BFO) role in its place.  

Which reminds me, at what point did the BC-224 come into the picture?

> Mike Hanz has kindly put T.O. 08-40SCR-1 from 1944 on his site.  It lists
> component interchangeability for the SCR-A*-183 and -283.  There is a
table
> which summarizes what components went to each variation.

In a rather sneaky moment, I downloaded it but right now I'm still under the
influence of sedatives from some minor surgery earlier today (Thursday) and
didn't think to look there.  (It doesn't help to type half asleep either
although I think I'm doing better now than usual.  At least the Spill
Chucker is complaining less. :-) )  I should also look at Dave's expose on
the history of the initial models to see how it relates.  

Yes, I definitely need an RA ... :-)

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!