The R4B was one of the cleanest analog designs ever and the addition of the pre-selector made it one of the cleanest sounding receivers ever. There are no crystal filters in the R4B, it is a dual conversion design with the second IF at 50 KHZ.

Back to Drake Next receiver Last modified 2023-01-26 Drake R-4B SPECIFICATIONS. GENERAL: Type: HF receiver: Frequency range: 10-80 m in 5 bands (With supplied XTALs) 80 m: 3.5-4.0 MHz 40 m: 7.0-7.5 MHz 20 m: 14.0-14.5 MHz 15 m: 21.0-21.5 MHz 10 m: 28.5-29.0 MHz Plus 10 optional XTAL positions for any 500 KHz coverage

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R-4B Amateur-R Drake Company, R. L.; Miamisburg, Ohio, build 1967–1973, 28 pictures, 2 schematics, 9 tubes, 10 semiconductors, United States of America

The R-4B covers: 3.5-4, 7-7.5, 14-14.5, 21-21.5 and 28.5-29 MHz plus ten additional 500 kHz crystal positions (with optional crystals). Modes of reception include: SSB, CW and AM. The dial accuracy is and impressive ±1 kHz. Features include: PBT, Line out, Crystal Calibrator (25 kHz), RF Gain, Mute Jack, Speaker Jack, Anti-Vox Jack and Dial Lamp.

Nov 21, 2023 · manual for the drake R4B. Skip to main content. Ask the publishers to restore access to 500,000+ books. An icon used to represent a menu that can be toggled by interacting with this icon. ... drake-r-4-b Identifier-ark ark:/13960/s2m9z4wvsxk Ocr tesseract 5.3.0-6-g76ae Ocr_detected_lang en Ocr_detected_lang_conf 1.0000 Ocr_detected_script ...

R4B Specifications; Frequency Range ..... 3.5-4.0, 7-7.5, 14-14.5, 21-21.5, 28.5-29 MHz Optional Ranges ..... Ten 500 kHz crystal ranges Modes ..... LSB, USB, AM, CW, RTTY AC Power ..... 120/240 VAC 50/60 Hz 60 Watts Antenna Input ..... 52 ohms nominal Selectivity .....

View and Download DRAKE R-4B instruction manual online. R-4B radio pdf manual download.

Drake really farted in the jug on the R-4C. The solid state audio has a cheap, tinny transistorized sound to it with a constant hum that sounds cheap. There are modifications out there to remedy this, mostly from Sherwood Engineering, that make it sound like it should. Lots of other R-4C modifications are a Good Idea to prolong its life as the ...