[Drake] Drake 2B Mechanical Filter--Henry Radio

[Ron]

I just acquired a Drake 2B and it has a mechanical filter installed on a
small sub-chassis.  It is a copper chassis and mounts directly behind the
crystal calibrator. It was manufactured by Henry Radio and includes a tube.

Does anyone on the list have any documentation on this accessory?  I sure
would like to get a copy of any information any of you may have.

Thanks,

Ron, AB5WG




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