[ARC5] BC-AO-430 transmitter

[Michael Hanz]

Mike, KK5F, produced an extensive 50 page rundown on the subject back in 
early 2015, entitled "/U.S. Military Aircraft Radio Sets Using Receivers 
Based On Aircraft Radio Corporation Model D Design/". This exhaustive 
report also covered the similar RU/GF sets made for the Navy.  The short 
version is that the SCR-183/283 system originally sprang from the 1930 
Aircraft Radio Corporation Model D receiver, and had a slew of additions 
and updates before the last SCR-AS-183 (14v) and BC-AR-283 (28v) 
contracts were signed in 1942. The changes through the 1930s are 
detailed in the document.  I've attached it to Steve's copy of this e-mail.

You should be glad you don't have one of the earlier SCR -183/283 sets - 
the VT-52 triodes are _extremely_ expensive (when you can find one) due 
to its popularity in high end audio amplifiers. The VT-25s are less so.

- Mike  KC4TOS

On 11/12/2021 12:35 PM, Steve WD8DAS via ARC5 wrote:
>
> At an Ohio hamfest I bought a beautiful BC-AO-430 transmitter in black 
> wrinkle finish (from W8AU). It appears from my online research this 
> rig was part of the SCR-183/283 system, and based on the design I'm 
> guessing those were an earlier aircraft radio system before the 
> SCR-274N or ARC-5 command-set systems. Is that correct?
>
> I have the manual and schematics from my online browsing but so far 
> I've not come across any history of the system. Can anyone point me to 
> such resources?
>
> Thank you...
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