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21. Re: [TenTec] din connector, etc. (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Wed, 24 Sep 2014 16:30:53 -0400; I'll ask on the 565/566 reflector whether anyone has issues with the 15 ms delay. My relays close in under 1 ms and I don't notice a problem. Maybe I didn't watch the scope close enough. I can hear e; /archives//html/TenTec/2014-09/msg00375.html (14,519 bytes)
22. Re: [TenTec] din connector, etc. (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Thu, 25 Sep 2014 09:45:20 -0400; So why then do the manufacturers design the T/R switching with this delay? Is it to avoid hot switching in the amplifier should one be used. Not really. This delay is necessary to permit settling of; /archives//html/TenTec/2014-09/msg00412.html (12,828 bytes)
23. Re: [TenTec] din connector, etc. (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Thu, 25 Sep 2014 09:45:06 -0400; So why then do the manufacturers design the T/R switching with this delay? Is it to avoid hot switching in the amplifier should one be used. Not really. This delay is necessary to permit settling of; /archives//html/TenTec/2014-09/msg00413.html (12,806 bytes)
24. Re: [TenTec] din connector, etc. (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Thu, 25 Sep 2014 15:33:47 -0400; So if the ARRL lab test is correct, and the RF delay is 17 ms on the Eagle, then time to settle receiving again is 70-17=53 ms. The TS 590S total turn around is only 20 ms. If you want to break into; /archives//html/TenTec/2014-09/msg00417.html (11,869 bytes)
25. Re: [TenTec] Centurion is on the Fritz (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Thu, 23 Oct 2014 16:29:39 -0400; Start by making sure the bias is switching from cutoff. It doesn't sound like it is. If the switch is a relay you may hear it close. If it closes and you have no idling current then perhaps you have; /archives//html/TenTec/2014-10/msg00221.html (9,902 bytes)
26. [TenTec] Posting to the Ten Tec Reflector (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Wed, 28 Jan 2015 11:51:22 -0500; We have numerous followers of this reflector who are not subscribers. Occasionally, but regularly, these observers attempt to post comments to the list. The amount of administrative review required o; /archives//html/TenTec/2015-01/msg00249.html (7,376 bytes)
27. Re: [TenTec] Centaur Tubes odd ones in parallel (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Wed, 1 Apr 2015 11:22:47 -0600; You can check the match both statically and dynamically by installing one triode at a time, and double checking you don't short the unused plate cap. Follow all safety precautions and all interlocks; /archives//html/TenTec/2015-04/msg00008.html (13,523 bytes)
28. Re: [TenTec] Centaur Tubes odd ones in parallel (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Wed, 1 Apr 2015 14:38:45 -0600; Why not equalize the grid current for each tube. Small resister to ground should do the trick. Some folks turn it into a grid fuse by using a very small wattage resister. If the grid current goes too; /archives//html/TenTec/2015-04/msg00012.html (16,880 bytes)
29. Re: [TenTec] Centaur Tubes odd ones in parallel (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Thu, 2 Apr 2015 00:17:04 -0600; I've already done it. I've also tried the grid fuse as well. My SB 220 has the grids strapped like this. See Richard Measures pages pages on SB 220 mods. Seems to me he is the main advocate for this.; /archives//html/TenTec/2015-04/msg00027.html (11,408 bytes)
30. Re: [TenTec] Centaur Tubes odd ones in parallel (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Thu, 2 Apr 2015 00:24:41 -0600; Here you go, read the last sentence Mr. Measures writes here: ANODE AND GRID GLITCH PROTECTION A glass-coated resistor can serve as a peak current limiter between the HV supply and the anode circuit.; /archives//html/TenTec/2015-04/msg00028.html (23,588 bytes)
31. Re: [TenTec] Centaur Tubes odd ones in parallel (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Thu, 2 Apr 2015 10:12:57 -0600; Actually, I tested many of his concepts on my SB 220 which I built around 1967 or so. I do not ascribe to them all. His theory on VHF parasitic oscillation has remained a topic which is still controv; /archives//html/TenTec/2015-04/msg00039.html (12,656 bytes)
32. Re: [TenTec] Centaur Tubes odd ones in parallel (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Thu, 2 Apr 2015 14:56:14 -0600; I never use tetrodes myself and that is what QRO uses. Commander may have one of the best RF decks in the business. But their control board is in need of help generally particularly their switching.; /archives//html/TenTec/2015-04/msg00043.html (15,377 bytes)
33. Re: [TenTec] Centaur Tubes odd ones in parallel (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Thu, 2 Apr 2015 16:11:26 -0600; Yes, indeed. But I only think of their higher power options with two or three holes of 4cx800 tetrodes. These sorts of ceramics with their high dissipation are where switching gets more difficult. I; /archives//html/TenTec/2015-04/msg00045.html (11,924 bytes)
34. [TenTec] Please subscribe to post (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Thu, 4 Jun 2015 13:55:17 -0400; I like to periodically remind our many readers who are not subscribers to this list, that they must subscribe to post. The server automatically rejects your postings if you are not a subscriber. If y; /archives//html/TenTec/2015-06/msg00009.html (6,973 bytes)
35. Re: [TenTec] Thanks To Moderator (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Sat, 4 Jul 2015 17:53:27 -0400; Hello Connie, All things Ten Tec are possible topics here. I hope you are able to post easily now and receive posts as well. I'm sure our 850 members will offer advice where they feel competent to do; /archives//html/TenTec/2015-07/msg00045.html (10,369 bytes)
36. [TenTec] Ten Tec JW-6 Enclosures Wanted (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Wed, 2 Sep 2015 19:44:02 -0400; Ten Tec is no longer producing these units. Does anyone have a JW-6 surplus to their needs? Tnx and 73, Mike W2AJI Sent from my iPhone _______________________________________________ TenTec mailing l; /archives//html/TenTec/2015-09/msg00006.html (6,781 bytes)
37. [TenTec] Posting to the Ten Tec Reflector (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Tue, 16 Feb 2016 17:17:45 -0500; Hello Ten Tec Fans, This is just a brief reminder to alert non subscribers to our list that YOU MUST BE A SUBSCRIBER TO POST. Please remember to indicate your call sign when you submit your subscript; /archives//html/TenTec/2016-02/msg00158.html (7,440 bytes)
38. [TenTec] Subscription is required for posting (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Thu, 25 Feb 2016 10:26:48 -0500; Hello Ten Tec Fans, We are still receiving posts from folks who have not subscribed. Please submit your subscription request and be sure to include your call sign if you wish to post and are not a me; /archives//html/TenTec/2016-02/msg00303.html (6,925 bytes)
39. [TenTec] Posting to Ten Tec Reflector (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Fri, 22 Apr 2016 10:01:05 -0400; Hello Ten Tec Fans, I need to periodically remind our viewers who are not members of this reflector that they must be subscribers to post. We receive frequent postings from non subscribed followers.; /archives//html/TenTec/2016-04/msg00131.html (6,952 bytes)
40. [TenTec] Intermittent loss of sensitivity on Orion 566 upon PTT switching (score: 1): Author: Mike Schatzberg <cherokeehillfarm@earthlink.net>; Date: Thu, 19 May 2016 19:05:38 -0400; Hello Ten Tec Fans: My normally reliable O2, sometimes returns from transmit to receive with a lower sensitivity. Switching back to transmit, and again to receive, the normal sensitivity returns. It; /archives//html/TenTec/2016-05/msg00120.html (8,326 bytes)

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