SHERWOOD DRAKE R-4C UPGRADES
THESE ARE SHERWOOD TYPE UPGRADES FOR THE R-4C. 2 POWER SUPPLY BOARDS, PRODUCT DETECTOR, AND AUDIO. SOLD
600 Hz 6-Pole First-IF roofing filter for Drake R-4-C $80 MAILED
Low Loss for Full Sensitivity!
Improve the early-stage selectivity of your Drake R-4C with the time-proven otpimum-bandwidth, low-loss CF-600/6 first-IF CW roofing filter.
Eliminate those high-pitched beat notes from signals thatleak around the switchable second-IF crystal filter.
Improve ultimate rejection to better than 130 dB, unlike competing units.
Eliminate the chance of strong signals overloading the second mixer, causing intermodulation and desensitization.