Hi Folks: The T/R relays in my Orion are inaudible. Although they were very quiet, I could hear them in the Orion II I had. TT claims no change in supplier or mounting method. I'm interested in an Om
Interesting, though I never owned those radios, I didn't know TT uses relays! Ron, wb1hga _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.conte
Sure do Ron...... _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
I'm trying to think of a modern Ten-Tec radio that doesn't use a relay for T/R switching, and can't think of one! 73, Duane Duane Calvin, AC5AA Austin, Texas www.ac5aa.com --Original Message-- From:
well in defense, I always thought they used diodes or "electronic switching" for that "smooth, clean QSK" they are famous for. I am gonna look in me 516 and surprise meself! (smile) Ron, wb1hga "the
Their reed relays are plenty fast enough and I see no real benefit over PIN diode switching except for longevity. Still, few relays fail in these rigs even after 20+ years. I did replace the T/R rel
Thanks for the post, Paul. If you have any pics of that Omni VII mod, please send them along to me. And Ron......NO need for any defense on your part. A perfectly reasonable expectation. ____________
Now that is truly a thing of beauty! Gary, ka1j _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
I believe the Argo V DOES use diode switching. The pin diodes used are exotic 1N4007. Don't laugh apparently these off the shelf diodes have PIN diode characteristics. 73, Rick VE7TK -- doesn't use a
The Omni 6/6+ also uses a handful of 1N4007 diodes as part of the T/R circuit, particularly for the 2nd Rx port. However, isolation characteristics are not nearly as good as a true PIN diode structu
Where does one obtain those UM2110 diodes? Dj k6rcl Dennis Jones k6rcl@cox.net _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/ma
At one time, Microsemi would "sample" them out to hams, in addition to their usual commercial and military customer base. That was back in the early '90s. Quite a few folks took advantage of it and
Thanks Paul, I KNEW TT used diodes! Me happy! Ron, wb1hga "relays?? what relays? ..." _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contestin
The Omni VI/VI+ used a reed relay for T/R switching, even tho they may have used diodes in the circuit. Remember all the complaints about how some folks could hear their relay and others couldn't? :-
Remember too there was the PTT relay which had N.O. contacts for keying an amp or other device. This relay could be turned on or off via the menu as the CCO control as I recall. This relay was the so
The mechanical mounting of a T/R relay has a profound effect on acoustical noise. To reduce noise of any relay in a T/R circuit, the idea is to reduce the effects of the PCB or chassis functioning a
Paul, that info was well worth the price of today's admission. Thanks for doing the homework on this one! 73, -Doug, W7KF _______________________________________________ TenTec mailing list TenTec@co
I need to correct myself. That should have read Matsushita/Aromat RSD-12V. Tnx. Paul, W9AC _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.cont
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sun, 09 Dec 2007 20:04:34 -0600
If the 1N4007 sort of did the job, probably a 1 watt or ten watt PIN diode would do a major part of the improvement the 1KW PIN diode does and would be more available. Dan's Small Part, RF Parts, and
The Microsemi UM2110 was selected for its voltage handling capability (1 KV DC), rather than its power handling. Recall that the very first Omni Sixes suffered from poor port isolation (~ 30 dB). Th