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21. Re: [Amps] What to buy? (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Fri, 28 Jan 2011 17:26:02 -0800; ORIGINAL MESSAGE: REPLY: Lighten up, Jim. No one has "discredited" this list. Had he asked about a specific use, that would have been the response. Since he didn't, the response was for general use.; /archives//html/Amps/2011-01/msg00391.html (8,230 bytes)
22. Re: [Amps] What to buy? (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Sat, 29 Jan 2011 02:12:21 +0000; Regardless, best advice is to buy the BIGGEST nasty-est bull of an amp you can afford. You can always load it to lower output a bit, but a small amp can NEVER be loaded to big output. Auto tune is a; /archives//html/Amps/2011-01/msg00392.html (9,530 bytes)
23. Re: [Amps] What to buy? (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Fri, 28 Jan 2011 18:29:39 -0800; ORIGINAL MESSAGE: REPLY: Amen, especially that last part. :-) 73, Bill W6WRT just turned 68 still need 24 states for 160 meter RTTY WAS time's getting short __________________________________________; /archives//html/Amps/2011-01/msg00394.html (8,530 bytes)
24. Re: [Amps] What to buy? (score: 1): Author: "Roger (Sub1)" <sub1@rogerhalstead.com>; Date: Fri, 28 Jan 2011 22:52:40 -0500; Ah, you young kids are just spoiled.! <:-)) I just went from a auto tune, auto band switching 1KW amp to a manual tune legal limit that I can't lift. It has plenty of overhead, and would run the lega; /archives//html/Amps/2011-01/msg00395.html (11,012 bytes)
25. Re: [Amps] What to buy? (score: 1): Author: "Gary Smith" <wa6fgi@sbcglobal.net>; Date: Sat, 29 Jan 2011 09:30:10 -0800; To chime in on this one: I have rune a AL-82. 1500 Po is in my op is the best bang for the buck UNLESS you can REALLY increase the db level. Like a 8877 level of tube. Also keep in mind the more Po t; /archives//html/Amps/2011-01/msg00398.html (9,883 bytes)
26. Re: [Amps] What to buy? (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sat, 29 Jan 2011 10:12:32 -0800; Of course -- only a fool would argue otherwise! But antennas (and especially towers) aren't cheap -- I could buy a couple of the latest Alphas for what I've invested in antennas! And once you've done; /archives//html/Amps/2011-01/msg00401.html (8,886 bytes)
27. Re: [Amps] What to buy? (score: 1): Author: "Roger (Sub1)" <sub1@rogerhalstead.com>; Date: Sat, 29 Jan 2011 17:01:02 -0500; Considering what I have in the 100' 45G installation (price concrete and steel lately), guy lines, and antennas, the 25G and antennas, I could purchase one whale of a *SO2R station* (Rigs and Amps) a; /archives//html/Amps/2011-01/msg00409.html (9,973 bytes)
28. [Amps] What to buy? (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Sun, 30 Jan 2011 06:11:27 -0800; ORIGINAL MESSAGE: REPLY: Maybe, maybe not. I owned a Command HF-2500 (now taken over by Palstar) and twice burned up the plate tank toroid operating full power RTTY on 40 meters. Twice!! $$$ I sold t; /archives//html/Amps/2011-01/msg00425.html (9,334 bytes)
29. Re: [Amps] What to buy? (score: 1): Author: "DJ7WW" <dj7ww@t-online.de>; Date: Sun, 30 Jan 2011 16:58:13 +0100; I repaired the Command 2500 of a friend twice. Both times burned toroids. Next time I visited him I saw the reason, he drove the amp to 3KW PEP output. 73 Peter ORIGINAL MESSAGE: REPLY: Maybe, maybe; /archives//html/Amps/2011-01/msg00429.html (10,317 bytes)
30. Re: [Amps] What to buy? (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Sun, 30 Jan 2011 08:32:59 -0800; ORIGINAL MESSAGE: REPLY: Hopefully, later production fixed it but I would ask before buying one. 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com h; /archives//html/Amps/2011-01/msg00430.html (8,292 bytes)
31. Re: [Amps] What to buy? (score: 1): Author: "Jeff Blaine" <keepwalking188@yahoo.com>; Date: Sun, 30 Jan 2011 13:54:36 -0600; Friend of mine has the QRO 2500 with the similar problems on the low end. Melted toroid mounts. The amp seems otherwise very strong. Just that toroid tank configuration seems to have a weak spot of s; /archives//html/Amps/2011-01/msg00442.html (10,056 bytes)
32. Re: [Amps] What to buy? (score: 1): Author: "Roger (Sub1)" <sub1@rogerhalstead.com>; Date: Sun, 30 Jan 2011 16:23:53 -0500; Aren't those tapped toroids? I would think those things would heat if tapped with the unused turns shorted, the wrong mix, insufficient core material, or a mounting that would prevent adequate coolin; /archives//html/Amps/2011-01/msg00446.html (11,616 bytes)
33. Re: [Amps] What to buy? (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sun, 30 Jan 2011 14:56:44 -0800; I've been studying ferrites for nearly seven years, most of it looking at suppression applications, but in doing so, I've learned quite a bit about ferrites in general. In general, we want ferrites t; /archives//html/Amps/2011-01/msg00456.html (11,509 bytes)
34. Re: [Amps] What to buy? (score: 1): Author: "Jim W7RY" <w7ry@inbox.com>; Date: Sun, 30 Jan 2011 17:07:02 -0800; "Duty Cycle: 50% in Amateur service at 2800 watts output power" Hardly "brick on the key" 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://list; /archives//html/Amps/2011-01/msg00457.html (11,058 bytes)
35. Re: [Amps] What to buy? (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 31 Jan 2011 10:52:57 -0500; Hmmm, ferrite has never been recommended for RF tank circuits that Im aware of. Ferrite is fine in receiver and other low level applications mostly at low frequencies. Good amplifier engineering has; /archives//html/Amps/2011-01/msg00461.html (14,041 bytes)
36. Re: [Amps] What to buy? (score: 1): Author: Larry Benko <xxw0qe@comcast.net>; Date: Mon, 31 Jan 2011 17:16:36 -0700; Jim, What frequency? 16 bifilar turns on a FT-240 size core would be about 8' total of #12 wire. At 20m #12 Cu wire is about 4 ohms per 100' so 8' would be about 0.32 ohms. Put 5.5A of current throug; /archives//html/Amps/2011-02/msg00001.html (12,056 bytes)
37. [Amps] What to buy? (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Thu, 3 Feb 2011 04:02:13 -0800; Date: Mon, 31 Jan 2011 10:52:57 -0500 From: "Carl" <km1h@jeremy.mv.com> Subject: Re: [Amps]To: What to buy? Hmmm, ferrite has never been recommended for RF tank circuits that Im aware of. Ferrite is; /archives//html/Amps/2011-02/msg00016.html (9,586 bytes)
38. Re: [Amps] What to buy? (score: 1): Author: Jim Barber <audioguy@q.com>; Date: Fri, 04 Feb 2011 10:28:38 -0800; A while back I went through the calcs in the Amidon reference book trying to find a way to stack a bunch of Mix 2 powdered-iron cores for the 160m "helper" inductor in a legal-limit project. I don't; /archives//html/Amps/2011-02/msg00017.html (12,014 bytes)
39. Re: [Amps] What to buy? (score: 1): Author: "Roger (Sub1)" <sub1@rogerhalstead.com>; Date: Fri, 04 Feb 2011 15:46:35 -0500; What about 40? same mix? I see a lot of amps appear to be using toroids 160 though 40 I would imagine. 73 Roger (K8RI) _______________________________________________ Amps mailing list Amps@contestin; /archives//html/Amps/2011-02/msg00019.html (11,437 bytes)
40. Re: [Amps] What to buy? (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Fri, 4 Feb 2011 21:24:47 -0500; found some small diam, edge wound ribbon coil stock that works the best for low band work. 3/8" edge wound ribbon [.072" thick] is the same as .28" tubing for current handling. 1/4" ribbon [ also .0; /archives//html/Amps/2011-02/msg00023.html (7,864 bytes)

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