Sherwood Engineering Incorporated Sherwood Engineering Incorporated
1268 South Ogden Street Denver, Colorado 80210 USA
email     Phone:
303-722-2257     FAX: 303-744-8876    
9 a.m. - 5 p.m. MST Monday - Friday

Sherwood Engineering Inc. Home Page Cooling Kits Drake R4-C Catalogues Filters Additional Products

Collins 455 kHz Mechanical Filters
455 kHz Crystal Filters

We have made a bulk purchase of new Collins mechanical filters. These are the classic "bathtub" cased filters that are typically black with blue markings. We will be making new boards to adapt them to the JRC NRD 515, 525, 535 and the Racal 6790GM. Bandwidths available: 10 kHz, 6 kHz, 5 kHz, 4 kHz, 3 kHz LSB &USB (for the Racal), 3.2 kHz, 2.4 kHz, 1 kHz, and 300 Hz.

We have a modest supply of each bandwidth currently in stock --

These are a 'one time' purchase. Make your selection while they last.

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Of course, experimenters can adapt these fine filters to other radios --

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Large 455 kHz Crystal Filters

This special purchase is allowing us to offer these filters at a fraction of their normal cost. Don't miss out.

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Sherwood Engineering Incorporated Sherwood Engineering Incorporated
1268 South Ogden Street Denver, Colorado 80210 USA
email     Phone:
303-722-2257     FAX: 303-744-8876    
9 a.m. - 5 p.m. MST Monday - Friday

Updated 6 March 2006