Ten-Tec filters
 

I have for sale two TenTec crystal-lattice receiver filters, #285 (500
Hz) and #288 (1.8 kHz). $45 each or $80 for the pair. They'll work in
several units, to include the Corsair, Paragon, and Delta, for example.
Filters are in as-new condition and are with original data and
installation sheets. de K3HVG