Hr-10B Lattice Crystal revisited

[G. Beat]

I have an HR-10B in storage, but I am fairly certain that it was an HC-6/U crystal.

It forms a half-lattice crystal filter for the IF between the first and second IF tube (as I remember) - schematic in manual will have that - older ARRL handbooks also have this in Receivers sections.

Greg

-------------- Original message --------------

> This is a request for additional information pertaining to my inquiry to the
> group last week. I asked International Crystal Mfg about acquiring a 1680.7kc
> crystal for the IF lattice filter in the HR-10B and their response is a series
> of questions. Here they are:
>
> Holder style
> Crystal frequency
> Load capacitance
> Calibration accuracy
> Temperature tolerance
>
> I know the frequency and accuracy, not sure of the holder style(HC51U ?), and
> have no idea regarding load capacitance or temperature tolerance. Can anyone
> help?
>
>
> Thanks again & 73,
>
> Tom K3TVC
>
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