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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*Topband\:\s+front\s+end\s+protection\s*$/: 9 ]

Total 9 documents matching your query.

1. Topband: front end protection (score: 1): Author: df2py@t-online.de (DF2PY); Date: Tue, 10 Sep 2002 04:02:26 +0200; hello reflectees ! The problem of protecting the rx front end while transmitting is a simple one. Its very important NOT to use an extra RX jack (which most Radios have these days)for beverage connec; /archives//html/Topband/2002-09/msg00090.html (7,887 bytes)
2. Topband: front end protection (score: 1): Author: spelunk.sueno@prodigy.net (EUGENE SMAR); Date: Mon, 9 Sep 2002 23:22:14 -0400; Folks: Wolf's idea sounds like it would make a good product (Are you listening, Gary KD9SV?) Merely switch the RX-only antennas during receive by using the rig's SEND line, or equivalent. Disable the; /archives//html/Topband/2002-09/msg00091.html (9,150 bytes)
3. Topband: front end protection (score: 1): Author: kd9sv@comcast.net (gary nichols); Date: Mon, 09 Sep 2002 23:42:04 -0500; The FES (front-end-saver) does exactly you are suggesting it should do. When the rig is keyed the receive antenna is disconnected, the receive port is shorted to ground and I also provide an addition; /archives//html/Topband/2002-09/msg00092.html (10,695 bytes)
4. Topband: front end protection (score: 1): Author: NX4D@comcast.net (Doug Waller); Date: Tue, 10 Sep 2002 02:12:10 -0400; one. these The easy way to protect the RX only front end is to shunt the receive only jack externally, with two switching diodes connected polarity reversed. I.C.E. uses this config. successfully in; /archives//html/Topband/2002-09/msg00093.html (7,769 bytes)
5. Topband: front end protection (score: 1): Author: kd9sv@comcast.net (gary nichols); Date: Tue, 10 Sep 2002 12:34:40 -0500; simple at effect large voltage coming in the RX port during transmit can still cause a lot of very wierd things to happen, ie RF induced foldback...the rig thinks a high VSWR is present and reduces o; /archives//html/Topband/2002-09/msg00094.html (9,604 bytes)
6. Topband: front end protection (score: 1): Author: jreisert@jlc.net (Joe Reisert); Date: Tue, 10 Sep 2002 14:56:30 -0400; Doug, The forward voltage drop of a single normal switching diode in the conducting state is about 0.6-0.7 volts. Are you advocating two in series and then "back to back" for both polarities? I belie; /archives//html/Topband/2002-09/msg00096.html (8,819 bytes)
7. Topband: FRONT END PROTECTION (score: 1): Author: magoo@isp.on.ca (Mr. Magoo); Date: Tue, 10 Sep 2002 19:37:10 -0400; After blowing up the antenna transfer board on my FT990 as a result of a very close lightning strike, I built up a relay switcher which (a) grounds the Beverage RX feed from the remote switch box whe; /archives//html/Topband/2002-09/msg00106.html (7,821 bytes)
8. Topband: Front end protection (score: 1): Author: price.smith@worldnet.att.net (Harold Smith); Date: Tue, 10 Sep 2002 22:30:54 -0500; To All: There has been much discussion about front end protection. If you have enough RF coming in on your receiving antenna to cause = damage, how will 1N914 diodes not open up? They are very low ra; /archives//html/Topband/2002-09/msg00107.html (8,145 bytes)
9. Topband: front end protection (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 11 Sep 2002 07:44:41 -0400; You have to be *very careful* when adding relays in the TX path. It is a major headache that almost anyone who has sold products in aftermarket accessory manufacturing knows all too well. The RX ant; /archives//html/Topband/2002-09/msg00112.html (9,050 bytes)

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