[Premium-Rx] Collins Mechanical Filters

[John Kolb]

Those are from the R-1051 receivers. These are 3.2 kHz @ 3 db
and 6.1 kHz wide at 60 db. 1K input resistance and 330 ohms
load. Resonating C is 130, 140, or 150 pF, color-coded orange,
yellow or green dots on filter end, and placed in series with
the filters, not in parallel.

Now my question is which receivers can use 450 kHz mechanical
filters?

John
<http://members.cts.com/king/j/jlkolb>

On Thu, 26 Feb 2004, Greg Bailey wrote:

> I've been helping an aging ham clear out some of his old stuff - of which
> he has an astonishing amount! Most is not likely to be of interest to
> Prem-Rxers - but ...
>
> There are three brand new Collins mechanical filters - military origin.
> They are one of F500Z11LSB, and two of F500Z10USB. These are - I think -
> 500kHz IF LSB & USB filters.
>
> Does anyone have a clue about the radio they would have been used in?
>
> Greg
>
>
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