[RVRC] 2 meter repeater proposed location

[Marvin Bronstein]

Members,

 

I have been in consultation with Paul, KC2VRJ, in reference to the
relocation of our 2 meter repeater to the state run tower.  

 

The state has given approval for our installation.  We need to make a
decision within a week or two.

 

I discussed the concerns we have expressed and in consideration with the
cost to locate on this tower.

 

The first and foremost concerns have been COVERAGE, ACCESS AND COST.

 

To the coverage question; computer modeling plots have been created showing
the coverage at 25 Watts and at 100 Watts.  Of course, the 100 Watt coverage
is better than the 25 Watt coverage. However, the plotted coverage at 25
Watts shows a very desired

Level even at 25 Watts. (Mainly due to the location and height).

 

We are allowed to run as much as 130 Watts but we are not allowed to use an
external power amplifier. So we are limited to the use of a commercial level
repeater (which is our ICOM model) and it's output is up to 50 Watts.

 

We, therefore, can run 50 Watts IF IT IS NEEDED. Paul suggested we start at
25 Watts (which will provide more reliability of equipment longevity.sans
failures) and we are allowed to raise the power to it's maximum output which
is 50 Watts IF IT BECOMES NEEDED.

 

We have complete access to our equipment for self servicing. We will never
have any expenses of servicing to antennas, feedlines or combiners...all
that will be serviced by the operator of the facility. We will be
responsible to cover the costs of any necessary maintenance to the filters
that we must purchase and they will install/tune. But we have never had to
perform service to duplexers once installed and working.

 

There are two antennas to this system...one for receive which provides a
high-gain antenna, large diameter feedline (low loss), and amplified
multi-coupler to provide sharing with other equipment.

The second antenna is also a high gain antenna and similar feedline with a
combiner to facilitate sharing with other transmitters.

 

This method of 'sharing' is very popular and is used at many locations
across the country and even abroad. 

 

We will be the ONLY 2 METER HAM REPEATER on this system and most likely on
the tower in total.

 

After speaking with Paul and reviewing the situation I feel it is an
EXCELLENT opportunity that we should jump on.

 

If we feel the need to raise the power from 25 Watts to provide some
specific area coverage, we can go to the limit of this repeater, 50 Watts.
(+3 DB) But the coverage provided by 25 Watts looks very good with even
handheld radios. While the coverage mapping

Did not show coverage using a 25 Watt mobile, it will be very solid going
from 5 Watts handheld to up over 7 DB with 25 Watts mobile.

 

I suggest we accept this and hurry before bad weather makes it difficult to
do the equipment installation.

 

73

Marv

K2vhw

 



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