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21. Re: [Amps] TV Transmitters (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Sun, 29 Mar 2009 13:43:55 -0500
Lynn, I've heard a few stations sold their tx to either LP stations that can stay analog or more often stations outside the U.S. that are continuing with analog for now. A functioning TV broadcast tx
/archives//html/Amps/2009-03/msg00532.html (7,741 bytes)

22. Re: [Amps] Hipersil the myth and the truth (Thread), (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Tue, 31 Mar 2009 11:48:06 -0500
Thanks Gary for this information about the Dahl line of transformers. I purchased a Dahl replacement for the stock plate supply transformer in a Ten Tec Centurion in 2004. I had gone through two Ten
/archives//html/Amps/2009-03/msg00553.html (7,198 bytes)

23. Re: [Amps] Hipersil the myth and the truth (Thread), (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Tue, 31 Mar 2009 12:24:17 -0500
Oops a little correction: "...(Harger only sells the Ten Tec Titan replacement for some reason) so I'm very glad I got mine when I did." Should read: (Harbach only sells the Ten Tec Titan replacement
/archives//html/Amps/2009-03/msg00554.html (7,333 bytes)

24. Re: [Amps] SB-220 6 Meter Conversion Article in April QST, (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Tue, 31 Mar 2009 22:23:51 -0500
Hi, I am unable to locate any article on a SB220 6 meter conversion in this month's (April) QST. Would someone please give me a page number? Tnx; 73 rob / k5uj _______________________________________
/archives//html/Amps/2009-03/msg00562.html (6,601 bytes)

25. Re: [Amps] SB-220 6 Meter Conversion Article in April QST, (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Wed, 1 Apr 2009 12:34:40 -0500
Thanks for giving me the correct QST information. How March 2008 could become "The April QST" is beyond me but so be it. 73 Rob / k5uj _______________________________________________ Amps mailing lis
/archives//html/Amps/2009-04/msg00008.html (9,329 bytes)

26. Re: [Amps] Centurion (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Thu, 28 May 2009 17:22:42 -0500
Phil, If you do anything with cooling on the Centurion, in my opinion, the best way to go is to change the internal fan. I am in the process of making several changes to my Centurion to equip it for
/archives//html/Amps/2009-05/msg00249.html (10,538 bytes)

27. Re: [Amps] Centurion (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Thu, 28 May 2009 18:37:57 -0500
One other thing Phil, you did not mention what mode you operate with your amp; it might be easiest to simply get your amp out in the open instead of tearing into it. If you are only using it for SSB
/archives//html/Amps/2009-05/msg00250.html (7,869 bytes)

28. [Amps] 3-500Z's: Brand ??, (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Tue, 9 Jun 2009 18:33:23 -0500
Dick, I have used the RF Parts "house brand" matched pair 3-500zg for the past 8 years with no problems. They are the ones made in China but they seem perfectly okay. I read somewhere that the differ
/archives//html/Amps/2009-06/msg00038.html (6,809 bytes)

29. [Amps] 200 watt rigs (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Mon, 3 Aug 2009 22:53:01 -0500
I used to wonder why anyone would want a 200 w. PA with a transceiver, then I got one. Now I do not consider purchasing a rig unless it has at least 200 w. p.e.p. output. (Actually I may never buy an
/archives//html/Amps/2009-08/msg00073.html (6,719 bytes)

30. Re: [Amps] W4GD Johnny Watson Amplifiers (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Mon, 17 Aug 2009 09:55:52 -0500
You have a SINGLE BLOOPER! A piece of ham legend. Johnny also made the immortal Double Blooper. When I was a new young ham, I attended a ham radio club meeting in Memphis. This must have been around
/archives//html/Amps/2009-08/msg00345.html (7,166 bytes)

31. Re: [Amps] PEP Wattmeter (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Fri, 2 Oct 2009 12:47:19 -0500
How much can you afford to spend? Want a cheap PEP wattmeter? two words: used oscilloscope. Accuracy? Reference it to RF ampmeter reading of some cw RF on a 50 ohm load. 73 Rob K5UJ _________________
/archives//html/Amps/2009-10/msg00025.html (6,338 bytes)

32. Re: [Amps] PEP Wattmeter (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Fri, 2 Oct 2009 15:27:58 -0500
Paul, don't hook the scope directly to the feedlne. you need some kind of tap. One quick trick is if you have a good coax switch (one of sufficient isolation--probably anything not MFJ as I have hear
/archives//html/Amps/2009-10/msg00028.html (8,701 bytes)

33. Re: [Amps] PEP Wattmeter (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Fri, 2 Oct 2009 18:07:54 -0500
That's a great idea; Thanks Carl. To get dc to trigger on I took a cheap CB swr meter and tapped off the diode that drives the meter and brought that out via an added BNC jack to the Y(?) scope input
/archives//html/Amps/2009-10/msg00030.html (11,441 bytes)

34. Re: [Amps] Peter Dahl XFMR question (I Have one!) (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Mon, 19 Oct 2009 11:34:09 -0500
Van, How much does the transformer weigh? I'm guessing around 50 lbs if it is 900 ma. Based on a purchase I made from W8CQ who is handling Dahl designs with Magcap, I estimate ur transformer new woul
/archives//html/Amps/2009-10/msg00266.html (8,135 bytes)

35. [Amps] B- questions (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Sun, 8 Nov 2009 00:31:32 -0600
<<<One caution however: there is no protection for the meter if there is an arc and the current rises to a large value. The meter could be destroyed. The best way to protect the meter is to use a pai
/archives//html/Amps/2009-11/msg00118.html (8,561 bytes)

36. Re: [Amps] B- questions (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Sun, 8 Nov 2009 09:05:10 -0600
Bill thanks for your answer. I appreciate the lack of gobbldygook But I fail to understand why all this metering of B- is somehow safe, but doing the same thing with B+ is not. If B- is around minus
/archives//html/Amps/2009-11/msg00122.html (6,904 bytes)

37. Re: [Amps] B- questions (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Mon, 9 Nov 2009 17:40:23 -0600
I thank everyone for the posts on B- ... I am slowly starting to get some of this -- I too prefer "reverse parallel" because it seems to make more sense to me -- I apologize for my question on the B-
/archives//html/Amps/2009-11/msg00149.html (8,261 bytes)

38. Re: [Amps] Black rope (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Tue, 24 Nov 2009 19:42:51 -0500
<<<Bottom line... Buy something less expensive and replace it once and a while. You have to replace the "black dacron" too. If the black sheath gets broken, it slides off the nylon. It MAY be OK if y
/archives//html/Amps/2009-11/msg00268.html (7,159 bytes)

39. Re: [Amps] QRO parts (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Tue, 24 Nov 2009 19:49:32 -0500
Sorry but glowing reports of billions of everything in places like Florida and Bangkok don't light my fire when there is no mention of quality level. Heaps of National, Millen, Johnson, Cardwell, Eim
/archives//html/Amps/2009-11/msg00269.html (7,860 bytes)

40. Re: [Amps] Alternative cooling strategies for SB-220? (score: 1)
Author: Rob Atkinson <ranchorobbo@gmail.com>
Date: Thu, 17 Dec 2009 13:09:47 -0600
Not sure what mode you want to operate (i.e. what duty cycle) but if high d/c the duct trick with the blower remoted may have this problem: the 220 fan is normally placed in the cabinet in such a way
/archives//html/Amps/2009-12/msg00391.html (9,538 bytes)

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