Heathkit SB/HW crystal filter info needed.

[Kenneth G. Gordon]

Quite some time ago, I was sent some very detailed information on the 
subject crystal filters, which I have subsequently lost, and really need 
again.

This info was sent to me by someone who may have been a Heathkit 
employee at one time.

It included exact descriptions of the internal construction of the filters, 
and which Heathkit stock number of filter went with which rig (SB-301, 
HW-101, etc.).

The information was detailed enough that one could, with some work, 
adjust most of those filters, which were in the 3395 Khz range, for 
practically any bandwidth one desired by changing crystal 
frequencies and/or capacitors/resistors.

Does anyone have this information? I would greatly appreciate 
receiving it again. I have searched everywhere I could have possibly 
put it and now cannot find it.

Ken Gordon W7EKB

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