It will be able to run on multiple frequencies, as it has the capabilities to be moved vis DTMF control. I think Kevin hit me in the right direction. Going to give that a shot and see what happens. Thanks.
Mathew
Eric Lemmon <[EMAIL PROTECTED]> wrote:
Mathew,We still need to know what RX and TX frequencies will be in the TM-731A radio. Do you intend to use this radio on both VHF and UHF? If your plan is to use the Kenwood on a fixed 2m simplex frequency that is not too close to the 145.410 MHz output of your repeater, you might be able to use a couple of bandpass cavities on it. It is far better (and complies with Part 97) to use a UHF simplex frequency for remote base operation. Again, a bandpass cavity may be necessary.73, Eric Lemmon WB6FLY
From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Mathew Quaife
Sent: Tuesday, March 14, 2006 6:37 PM
To: [email protected]
Subject: RE: [Repeater-Builder] Having a 2 meter remote base radio in house with a 2 meter repeater, any optionsHi Eric, the remote radio is basically a dual band radio that is tied into the system using the Doug Hall RBI-1. The radio is a Kenwood TM-731A. It will be running low power at about 5 watts max.Repeater is 145.410 - 144.810 PL 131.8The repeater is a converted micor mobile into a DB-224 up at 130 Ft. fed with 7/8" hardline. Power out is 115 Watts out of the duplexer, 200 watt amp feeding the duplexers.Mathew
Eric Lemmon <[EMAIL PROTECTED]> wrote:Mathew,
As you know, the 600 kHz split on 2m channels makes it difficult to perform
frequency-selective filtration without using several large cavities. In
order to suggest some options, we need to know a lot more about your
installation, such as:
1. RX and TX frequencies for each radio
2. TX power and RX sensitivity for each radio
3. Make and model of each radio is helpful
4. Any other radio transmitters at the same site?
5. Are all frequencies fixed, or is one radio going to be agile?
Bear in mind that horizontal separation between antennas is almost
meaningless- it would require more than a mile of horizontal separation to
provide the same isolation as a few hundred feet of vertical separation.
Therefore, depending upon the frequencies involved, it may be possible to
use a combination of notch and pass cavities to achieve your goal.
73, Eric Lemmon WB6FLY
-----Original Message-----
From: [email protected]
[mailto:[EMAIL PROTECTED] On Behalf Of n9lv
Sent: Tuesday, March 14, 2006 5:46 PM
To: [email protected]
Subject: [Repeater-Builder] Having a 2 meter remote base radio in house with
a 2 meter repeater, any options
What I need to know is if there is any type of isolator or other
device that I can put on my dual band radio that will keep my two
meter transmitter out of the 2 meter side of my radio. I know this is
a long shot, but if it can work, it would be excellent.
What I am running is 120 watts out of the duplexer on 145.410 Mhz.
Any suggestions. The antenna's are on separate towers but only about
40 feet apart base to base, the remote base antenna is at 90 feet and
the repeater antenna is at 130 feet.
Thanks.
Mathew
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