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21. Re: [Amps] Solid state amps (score: 1): Author: "Winfried Kriegl" <dk9ip@gmx.de>; Date: Fri, 7 Jan 2005 23:36:10 +0100 (MET); Thats the reason we are looking for a way to use cheap plastic case Mosfets like the ones from APT to work in linear operation mode (at high power level)... 73 Win DK9IP -- +++ GMX - die erste Adress; /archives//html/Amps/2005-01/msg00107.html (8,412 bytes)
22. Re: [Amps] Solid state amps (score: 1): Author: "Steve Thompson" <g8gsq@ic24.net>; Date: Sat, 8 Jan 2005 08:11:46 -0000; MRF154s are an expensive way to buy power - basically, they are 4 x MRF150 in a single package - and more than double the price of the single devices - MRF150s are 30 cents/W. The thing with a tube a; /archives//html/Amps/2005-01/msg00120.html (8,743 bytes)
23. Re: [Amps] Solid state amps (score: 1): Author: "Steve Thompson" <g8gsq@ic24.net>; Date: Sat, 8 Jan 2005 08:17:44 -0000; I remember one like that which used bipolars. The MOSFET article I have describes a complete amp built into a rack mounting case. I did some searching and I think it might have come out as Motorola a; /archives//html/Amps/2005-01/msg00121.html (8,731 bytes)
24. Re: [Amps] Solid state amps (score: 1): Author: "wc6w@juno.com" <wc6w@juno.com>; Date: Sun, 9 Jan 2005 17:49:25 GMT; Hi Steve, <snip> AR580 is a reprint of the Dec. 1982/Jan 1983 QST Article. Eight MRF150 based modules and also shows the required LPF's. 73 & Good morning, Marv WC6W _________________________________; /archives//html/Amps/2005-01/msg00147.html (8,213 bytes)
25. Re: [Amps] Solid state amps (score: 1): Author: "Steve Thompson" <g8gsq@ic24.net>; Date: Sun, 9 Jan 2005 20:03:04 -0000; That's the one we're looking for - anyone got an electronic copy? Thanks, Steve _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailm; /archives//html/Amps/2005-01/msg00156.html (8,601 bytes)
26. [Amps] Solid state amps (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Thu, 31 Mar 2005 16:09:18 -0500; Hi all, I've collected parts to do 9 push pull MRF150 stages and someday maybe I will assemble. The boards will be modified ENI surplus. I found ENI transformers don't work well below 7 MHz. and the; /archives//html/Amps/2005-03/msg00749.html (6,771 bytes)
27. Re: [Amps] Solid state amps (score: 1): Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>; Date: Thu, 31 Mar 2005 19:39:10 -0600; Of course you realize that running the DC through the transformer is disadvantageous because it creates a strong "B" field in the core which can drastically reduce the dynamic response of the DC/RF t; /archives//html/Amps/2005-03/msg00755.html (9,061 bytes)
28. Re: [Amps] Solid state amps (score: 1): Author: "Will Matney" <craxd1@ezwv.com>; Date: Thu, 31 Mar 2005 23:46:05 -0500; See below, ** REPLY SEPARATOR ** I take it "B field" meaning the maximum flux density or Bmax? Once Bmax is reached, the waveform becomes distorted anything over this maximum flux density. The permea; /archives//html/Amps/2005-03/msg00757.html (11,297 bytes)
29. Re: [Amps] Solid state amps (score: 1): Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>; Date: Thu, 31 Mar 2005 22:55:30 -0600; <<This I dont understand as the same amount of DC current will still flow through the windings of the RF transformer if the DC is fed to its center tap like in all designs. Or are you speaking of con; /archives//html/Amps/2005-03/msg00759.html (13,384 bytes)
30. Re: [Amps] Solid state amps (score: 1): Author: "Will Matney" <craxd1@ezwv.com>; Date: Fri, 01 Apr 2005 00:12:02 -0500; William, That's what I thought you meant but wasn't sure. Yup, that would work fine as your killing the DC component from the transformer. I've seen this design used in a few places. I dont know why; /archives//html/Amps/2005-04/msg00000.html (14,105 bytes)
31. Re: [Amps] Solid state amps (score: 1): Author: Dennis12Amplify@aol.com; Date: Fri, 1 Apr 2005 01:44:54 EST; Once I believe they call that the 'CURIE' temperature. Regards, Dennis O. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/lis; /archives//html/Amps/2005-04/msg00001.html (6,999 bytes)
32. Re: [Amps] Solid state amps (score: 1): Author: "Steve Thompson" <g8gsq@ic24.net>; Date: Fri, 1 Apr 2005 07:55:52 +0100; I think that Curie temp. is the point at which the magnetic properties change (it's how old type Weller irons do temperature control) but it's not necessarily destructive. Some materials recover afte; /archives//html/Amps/2005-04/msg00002.html (6,949 bytes)
33. [Amps] Solid State Amps (score: 1): Author: Philip de Cadenet <phil@transmittersrus.com>; Date: Fri, 1 Apr 2005 09:29:35 +0100; Will & others, In case you don't know already these people make impedance matching transformers for CCI: www.rfpowersystems.com Out in AZ. -- Philip de Cadenet G4ZOW Transmitters 'R' Us http://www.tr; /archives//html/Amps/2005-04/msg00004.html (7,130 bytes)
34. Re: [Amps] Solid State Amps (score: 1): Author: "Will Matney" <craxd1@ezwv.com>; Date: Fri, 01 Apr 2005 17:55:11 -0500; Phillip, Thanks for the info, it will come in handy! Best, Will ** REPLY SEPARATOR ** On 4/1/05 at 9:29 AM Philip de Cadenet wrote: _______________________________________________ Amps mailing list A; /archives//html/Amps/2005-04/msg00027.html (7,766 bytes)
35. Re: [Amps] Solid State Amps (score: 1): Author: "k7fm" <k7fm@teleport.com>; Date: Fri, 8 Apr 2005 06:29:40 -0700; I have a big concern for this forum when the solid state amps finally replace the tubes. Some amp experts will have to start over with remedies. I mean transistors do not have gold melt balls rolling; /archives//html/Amps/2005-04/msg00173.html (8,562 bytes)
36. Re: [Amps] Solid State Amps (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Fri, 8 Apr 2005 07:36:31 -0700 (PDT); Don't worry, Colin; we have X-ray capability in the building I work in -- let me know if you'd like your transistors post-mortem'ed... :-) Joe, N3JI Colin K7FM -- Do you Yahoo!? Better first dates. M; /archives//html/Amps/2005-04/msg00176.html (7,325 bytes)
37. Re: [Amps] Solid State Amps (score: 1): Author: Steve Thompson <g8gsq@ic24.net>; Date: Fri, 8 Apr 2005 17:32:40 +0100; I think your fears are unfounded. Plenty of melted gold, maybe not tiny balls, more like puddles.... But magic will still be needed. Absolutely, categorically, cast iron guaranteed! In fact, folks wi; /archives//html/Amps/2005-04/msg00177.html (8,543 bytes)
38. Re: [Amps] Solid State Amps (score: 1): Author: "George" <gclute@comcast.net>; Date: Fri, 8 Apr 2005 11:41:28 -0700; Yes, what he said. Colin has been touched with divine intervention Witness an epiphany right here on amps Geo W7LFD. == Behalf Of k7fm: He said... I have a big concern for this forum when the solid s; /archives//html/Amps/2005-04/msg00181.html (8,596 bytes)
39. Re: [Amps] Solid State Amps (score: 1): Author: Richard Measures <r@somis.org>; Date: Fri, 8 Apr 2005 12:48:45 -0700; Transistors are optimized to discourage parasites. New religions need only one charisma ic person, a supply of suckers, and a generous supply of hallucinogens. Not likely since, unlike electron-tubes; /archives//html/Amps/2005-04/msg00184.html (9,128 bytes)
40. Re: [Amps] Solid State Amps (score: 1): Author: Richard Measures <r@somis.org>; Date: Fri, 8 Apr 2005 13:10:50 -0700; Resistance wire is magic?... Rich Measures, 805.386.3734, AG6K, www.somis.org _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman; /archives//html/Amps/2005-04/msg00185.html (9,002 bytes)

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