[Milsurplus] Radio rang, real vs estimated

[Bob Camp]

Hi

How ever far you can get on 80 meters with a 1/4 watt of AM you are 
going to get a lot less distance on 160 with the same power and short 
antenna.

The thing that still amazes me about this all is that they were trying 
to do all this at the low frequency end of the radio's range. It would 
be interesting to see if there is any real evidence that they were down 
at 2.0 MHz and not up quite a bit higher. With all the radios involved 
being capable of VFO operation a frequency change would have at least 
theoretically been possible.

The lack of any real documentation makes me wonder if we are chasing a 
phantom here ...

	Take Care!

		Bob Camp
		KB8TQ


On Nov 15, 2004, at 3:25 PM, W7QHO at aol.com wrote:

> Ray,
>
> Had a pair of TBYs at an MRCG meet a few years ago.   Planned to have a
> distance shoot-out between them and a pair of BC-611s.   
> Unfortunately, one of the
> TBYs had problems and   we were unable to complete the test.   The 
> 611s worked
> out to about a mile as I remember.
>
> In the summer of 2003 we took a 611 out on the SS Lane Victory (San 
> Pedro,
> CA).   We didn't have an accurate means of determining distance on 
> that trip,
> but two-way voice communication with a GRC-9 on the shore was solid 
> out to
> something over a mile (est.).  Interesting thing, though, was that the 
> GRC-9 was
> still coming in full quieting on the 611 up to 25 miles out, the 
> furthest point
> the ship goes on these weekend outings.   At that distance the 611 
> carrier was
> still faintly detectable on the shore.   These results over a clear 
> salt
> water path, 611 on it's whip over a steel deck and the GRC-9 on a high 
> long-wire
> ant.
>
> This last summer we took a BC-659 and a GPS receiver out on one of the
> cruses.   Had another 659 on the shore and achieved solid comms all 
> the way out to
> 25 miles, see above.   This with both rigs on the attached whip 
> antennas.
> These FM sets were rated at 3-5 miles by the Signal Corps.
>
> Hope to do a more definitive 611 to 611 test from the ship next summer.
> Maybe do another TBY to TBY run at the MRCG in May as well.
>
> Dennis D. W7QHO
> Glendale, CA
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