[Milsurplus] PRC-74

[WA5CAB at cs.com]

The AS-2259/GR was apparently originally designed for AN/PRC-47.  The base 
section screws directly into the bowl insulator of the RT-671.  When AN/PRC-74 
replaced AN/PRC-47, the newer radio wasn't hefty enough to do this with so they 
designed the MX-9313/GR matching unit to sit under the antenna.  I have been 
looking for one of the matching units for a long time, with no luck.  However, 
I do have two extra complete AS-2259's available.  $125.00 plus shipping.

In a message dated 6/13/2008 6:55:33 PM Central Daylight Time, 
ersmar at verizon.net writes: 
>      Here's a URL http://www.radiowavz.com/html/nvis.htm that discusses 
> NVIS (Near-Vertical Incidence Skywave) antennas.  You can also search on NVIS 
> and find numerous other sources.  Theses antennas are essentially 
> low-to-the-ground horizontal dipoles that exhibit high take-off angles for low-band HF 
> signals.  The high T.O. angles of NVIS antennas permits signals of up about 12 
> MHz to be returned to earth within 300-500 miles of the transmitter (between 
> ground wave and first e-layer skip range) with very little attenuation.
> 
>      One military antenna model designed specifically for NVIS work is the 
> AS-2259.  This is two crossed dipole inverted V wire sets, resonant at about 
> 6.5 MHz and 9.0 MHz, that are supported by sections of fifty-Ohm rigid 
> transmission line.  You would need a tuner between this antenna and your -74.  I, 
> and others on this reflector, have made similar antennas, but the wires are 
> resonant on 80M and 40M (or 60/40 or 80/60, etc.)  Coverage from my antenna on 
> the low bands (80 and 40) is excellent, with highly readable signals out to 
> several hundred miles with 80 Watts from my own batt operated IC-746.
> 
>      Scroll down on the above URL to M-7. There are results from tests done 
> by the US Army in Thailand's jungles with PRC-74's.  If you team up your own 
> -74 with one of these NVIS wire sets, you WILL be heard out to several 
> hundred miles.
> 
> 
> 73 de
> Gene Smar  AD3F
> 
> 
> From: n2lxm at juno.com
> Date: 2008/06/13 Fri PM 03:50:02 EDT
> To: milsurplus at mailman.qth.net
> Subject: [Milsurplus] PRC-74
> 
> Greetings All,
> 
>         Well after all most a year of collecting bits and pieces I am all
> most ready to get my PRC-74 on the air. I am looking for information and
> suggestions on what would be a good antenna to use for portable work.
> Also having just received an CY-6121( wet ) battery box, I have been
> looking for specifications for the BB-418/U battery. From my research
> using the radio with a 9 to 1 RX / TX ratio would require a 12 -15 volt
> battery with a 15Ah rating. Can anyone confirm this as fact.  I am hoping
> to be ready for Field Day and to have some fun this summer going back
> packing. Any input will be greatly appreciated. Thank You.
> 

Robert & Susan Downs - Houston
<http://www.wa5cab.com> (Web Store)
MVPA 9480
<wa5cab at cs.com> (Primary email)
<wa5cab at comcast.net> (Backup email)
   
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