[Collins] Help with ID

[Dr. Gerald N. Johnson, electrical engineer]

Its part of a phone line multiplexor. The filter bandwidth is probable
2.7 or 3 KHz. The filters might have application in home brew hamgear.
The module has no application in ham radio. I've not yet seen any such
low frequency mechanical filters applied to home brew equipment. The 100
KHz carrier frequency is hard to mix down to from HF ham bands without
too much image response and the filter is too wide for use with VLF
receivers for CW and narrow band modes and too narrow for Loran-C.

73, Jerry, K0CQ, Technical Advisor to the CRA.
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