The answer is "probably." The fact that others have tuned a TKR-850 to
the 70cm band is not an absolute guarantee that your unit will do the
same. It may work fine, or it may barely make it.
The TKR-750 and -850 repeaters have manually-tuned bandpass filters in
the front end that must be optimized for the Ham bands. As delivered,
the filters in the TKR-850 are optimized for 450-470 MHz, but still need
to be tweaked for maximum receive sensitivity. Also, the RX and TX VCOs
need to be adjusted slightly to ensure that they operate over the
optimum locking range. Like most RF equipment, operating a TKR repeater
outside of its specified band carries some risk; it's best to minimize
the risk with careful tuning.
Before you attempt to tune this repeater, get a Service Manual from
Pacific Coast Parts, about $23. Leave the repeater power on while
you're waiting for the manual, so that the reference crystal oscillator
can "settle in" to a stable frequency. Every TKR repeater I have set up
needed to have the reference oscillator tweaked slightly to bring it
exactly on frequency.
73, Eric Lemmon WB6FLY
aj4ef wrote:
>
> KENWOOD TKR-850 UHF REPEATER Can it be tuned and Programed in the
> Ham Band?
> The 450-470 Mhz Model.
> I need it to TX 442.100 RX 447.100
> Thanks for the help.
>
>
> Yahoo! Groups Links
>
>
>
>
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