[Milsurplus] C-30 vs C-30A/ARC-5 and other small details

Sun, 7 Mar 2004 11:00:39 EST

Mike,

You're welcome. That's one of the reasons why I always keep all versions of 
the manuals that I come across. And it occurrs to me that in this case the 1950 
edition is a better one for the collector than the 1954 one. The 1950 
revision only changed two pages (parts lists) so it is essentially the June 1945 one. 
I don't know how many pages were changed nor what was on those pages in the 
1953 rev and the 1954 one was a complete redo, with all revision history zeroed 
out.

I had forgotten about the position 1 requirement, and I'm sure that the C-30A 
was less expensive but I can't think of too many reasons why you would, when 
flying, want to run the R-28 without running the T-23. But the main reason for 
my comment was from the standpoint of a pilot needing to select a different 
channel while getting shot at and racking the aircraft around. The four 
pushbuttons on the C-30 can be selected by feel whereas the rotary switch requires 
counting clicks and knowing which channel it was on before you started. Plus the 
rotary switch will start the tuning circuits homing to the first position 
switched to, then the second, etc. whereas the pushbutton will just send it 
straight to the only one selected.

In a message dated 3/7/2004 9:30:24 AM Central Standard Time, 
[email protected] writes: 
> >The base date of AN 16-30ARC5-2 is 23 February 1944.  The 15 June 1945
> >revision adds among other things the C-30A/ARC-5.  So it is WW-II.
> 
> Thanks, Robert.  That's exactly the info I was needing.
> 
> >Personally, I think that the C-30 was the better design.
> 
> I'd be interested in your thoughts about why you like the C-30 design.  I
> was thinking just the opposite.
> 
> The C-30A by comparison is smaller, lighter, and much less mechanically
> complex inside.  It doesn't require the T-23 to be in the number 1 rack
> position.  It has the capability of selecting VHF channels on the R-28
> receiver without the need to turn on the transmitter set, while on the C-30
> depressing a VHF channel select button aways energizes the transmitter
> heaters.  I've just got to think that the C-30A was a lot less expesive to
> build to boot.
> 

Robert Downs - Houston
<http://www.wa5cab.com> (Web Store)
<[email protected]> (Primary email)
<[email protected]> (Backup email)

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