[ARC5] [Milsurplus] BC-AR-430 Transmitter Need Info and Schematic

[Mike Hanz]

  On 8/29/2010 12:23 PM, Jim Hill wrote:
> a few questions:
> What is the B+ voltage?

The voltage charts in TM 11-200 shows a range of 285v (key down) to 310v 
for the two dynamotors in the set.

> What antenna is it designed for?  I'm guessing it is a low impedance
> antenna like the command transmitters and 50 ohms is too high.

In general, yes.  It gets a bit more complex than that, of course.  The 
TM only suggests an open wire antenna of 35 feet minimum.  If you'll 
peruse the charts at 
http://aafradio.org/docs/Aircraft_Antenna_Design.html you will see a 
variation of factors you can plug into the nomographs to get a handle at 
40M and 80M for a typical aircraft antenna of 35 feet length.  That 
won't match your ham antenna because you don't have a perfect 
counterpoise (aircraft skin), but it will tell you the ballpark of what 
the transmitter is designed to tune.  Dave's matching suggestions should 
get you in the range for success.

73,
Mike  KC4TOS