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

Drake R-4C Filters Drake R-7 & TR-7 Filters Racal 6760 GM Filters Atlas Radio Replacement SSB Filter Icom R - 9000
Sherwood Engineering Inc. Home Page Cooling Kits Drake R4-C SE-3 MK III Catalogues

Filters

Drake R-4C Filters

    Additional Information - First-IF Crystal Filters    
  • CF-1.7K/8 2nd IF Narrow SSB Filter: $105.00 US

  • Two-filter switching with PC board & relay sockets: $95.00 US*
  • Three-filter switching with 2 PC boards & sockets: $185.00 US*
  • Four-filter switching with 2PC boards & relay sockets: $275.00 US*
  • LSB & USB CF-2K/8 filter pair: $199.00 US
*  The prices of the switch kits above have increased due to an price increase in the TO-5 relays.
Shipping Information

Drake R-7 & TR-7 Filters:
    AM Filters:
  • 6 kHz CD - 6K / 8: $105.00 US
  • 4 kHz CD - 4K / 8: $105.00 US
  • 3 kHz CD - 3K / 8: $105.00 US NEW
 
    SSB and CW Filters:
  • 1.8 kHz & CW filters: $105.00 US
Get yours while supplies last!
Shipping Information

Racal 6790 GM Filters:
    AM Filters:
  • 16 kHz CR - 1600 / 15: $149.00 US
  • 8 kHz CR - 8000 / 9: $149.00 US
  • 5.7 kHz CR - 5700 / 9: $149.00 US
  • 3.5 kHz CR - 3500 / 9: $149.00 US
 
    SSB and CW Filters:
  • 2.1 kHz CR - 2100 / 8: $225.00 US
  • 400 Hz CR - 400 / 8: $225.00 US
Shipping Information

Atlas Radio Replacement SSB Filter

Replace the wide 2.7-kHz crystal filter in your 210 or 215 transceiver with a more desirable 2.2-kHz 8-pole crystal filter. This is a direct mechanical and electrical drop in replacement filter for the original unit. Requires adjusting carrier oscillator capacitor to compensate for the narrower bandwidth. This filter is on 5645 kHz. There may be some early 210/215s that were on a different IF frequency. Fully refundable if it doesn't work with your radio.

Shipping Information
   Icom R - 9000

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