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RADIOHF - SHERWOOD SE-3 MkIIID Synch Detector SHERWOOD Engineering SE-3 MkIIID High-Fidelity Synchronous Detector in excellent condition with external wall power supply and operating instructions. Audio upgraded for even better clarity by using polypropylene caps in the audio path. This is my personal unit and it has very low operating hours of use. Switch dressing hardware added for visual and physical enhancement. Can be upgraded to MkIV functionality by adding a SPST minature toggle switch and one 100K, 1/4W resistor allowing for better locking onto AM roundtable reception. Instructions provided. This 'Cadillac' of synchronous detectors adds SSB reception to older AM only receivers. The host receiver must have a 455KHz IF output available. $1299 plus shipping to be determined; payable by money order (must be mobile deposit friendly like USPS). Sold "as-is" and sale final. No returns or refunds. Sells and ships to USA residents only. No offers please. Listing #1737396 by N7RAK Submitted on 07/26/25 Submitted from IP 38.109.253.73 Click to Contact Back to Previous Page

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