Hi Rob,
It would involve tuning the receiver for normal
spec within the standard range, noting the
metering point values (of specific interest are
the injection levels).
Retune the receiver with the <445 channel element
in place and note the level differences. You
might have to modify some of the the injection
chain values depending on the preformance of
the stage with the new lower frequency.
I just did this operation, going the other
direction. The MSR retunes well, but the injection
stage drops off hard/fast when you go outside
its rated range. You could estimate the
injection stage values by reviewing the manual
parts lists for the 450-470 range vs the T-Band
490 stage values.
[sidebar]
Similar things happen with the Micor. I moved
an 800Mhz Micor up to 907Mhz back in the late
80's (part of one of the first 900Mhz repeaters
on the air in Northern California), requiring
the same methods mentioned above plus a bout of
serious preselector size reduction via a wheel
grinder and polish file.
Good luck
cheers
skipp
skipp025 at yahoo.com
www.radiowrench.com
> "Rob Odell" <[EMAIL PROTECTED]> wrote:
> In a recent move I've lost my documentation on moving the MSR-2000
> primary UHF receiver down below 445 while maintaining its rated
> performance. Does someone have the info handy? I'd hate to have
to
> redevelop it on my own.
>
> Thanks in advance,
>
> Rob
> W2IO
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