At 11:03 AM 6/12/05, you wrote:
>this subject may have been touched on before, but I could not find
>it. What I am wanting to do is to build a mobile cross band
>repeater. I have 2 mitrek pa decks: 1 t53jja1900ak chassis HUD1012A,
>and 1 t43jja1900ak chassis HUD1002A. I am wondering if there is a way
>to change the decks, 1 on the tx side and 1 on the rx side to uhf
>440. is it just the matter of changing channel elements to uhf or do
>I have to change alot of the internal workings of the rigs. Also, a
>copy of a service manual possibly in .pdf would greatly be helpful
>have been all over the internet to no avail. Any ideas or help would
>greatly appreciated on this. Thanks
The receiver and exciter of the Mitrek are all one board. The PA deck
deck is made up of ceramic substrates that are bolted into the heat sink.
What you want to do is simply not cost effective or practical.
If you want to take two radios and make up a split site high band
repeater with a UHF cross-link then you need to find one each UHF
and high band GE Mastr II and simply swap the receivers, then
bring the RX antenna connector out to the front panel. The
mod is so easy you would think the radios were designed for that.
Look at the procedures for duplexing the Mastr-II on
repeater-builder.com - it's all there.
You will end up with a 2m RX in the same housing as the UHF TX,
and a 440 RX in the same housing as the 2M TX. Put the control
stuff at the 2M RX end and treat the 2M RX/440 TX as if they were
a single site 2M repeater.
BTW you will be a lot happier if the UHF radio you pick for this is a
406-420MHz model and you get a 420.5 to 421 MHz (or so) crosslink
frequency, use low power, and beam antennas. If the distance is short
(less than 5 miles) you will probably be able to disconnect the PA deck
completely and feed the 420 exciter to the beam antenna.
Mike WA6ILQ
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