1944 radar problem | Furuno USA Community
2016年6月15日 · It sounds like the radar scanner has a problem with a relative inexpensive part called the reed relay. The antenna switches it once for every rotation. Since it is constantly switching, older radar scanners tend to see them wear out.
DRS4D PROBLEM - Furuno USA Community
2013年7月23日 · Check the reed relay switch up in the scanner. There is a small magnet on the bottom of the array that will pass over a little black looking thing once every rotation. This is the reed relay switch. With the system off, you can turn the array by hand and rotate it over the relay.
Llis - NASA
A commercial data scanner using a bank of reed relays failed during thermal-vacuum testing of the SEASAT-A Synthetic Aperture Radar (SAR) Transmitter subassembly. Transmitter circuits requiring +5 volts were exposed to as high as 31 volts during each scan, resulting in catastrophic failure in the +5 volt circuits of the Transmitter.
US3812439A - Scanner with reed relays - Google Patents
Electrical switching apparatus such as a scanner comprises a plurality of reed relays, each of which has an operating coil, and at least one reed contact unit which is mounted outside the...
US3812439A - Scanner with reed relays - Google Patents
reed board coiled conductor tracks scanner unit Prior art date 1971-06-19 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US00264038A Other languages English (en ...
Standex Electronics’ reed relays offer high isolation voltage between coil and contact up to 7000 VDC. These relays can switch up to 1500 volts and have a stand-off voltage of up to 5000 VDC across the open contacts. Bigger reed relays can have breakdown voltage ratings up to 15 kVDC or even up to 20 kVDC when
Reed Relay - engineerswikis.com
2023年10月18日 · A reed relay is a type of electrical relay that utilizes reed switches as its switching mechanism. It combines the principles of a reed switch and a relay, providing the benefits of both components. Reed relays are characterized by their compact size, fast switching speed, low contact resistance, and high electrical isolation.
Reed switch based reed relays, made by inserting a single or multiple reed switches into a wound bobbin, are available in very small sizes and can go on for millions of operations. Current sensors find applications in almost every electronic circuit for overload protection.
Standex Electronics’s RF reed relays are ideal for this application. The CRF series has a flat insertion loss up to 7 GHz; and the new SRF series has a flat insertion loss out to 20 GHz; both of which, add no distortion and maintain a low contact resistance.
Reed switches or relays eventually fail in one of three ways. They do not open when they should (usually called “sticking”), they fail to close when they should (“missing”), or their static contact resistance gradually drifts up to an unacceptable level. At light loads, failure may not occur until several billion closure cycles have occurred.
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