Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+HV\s+MOSFETs\s+for\s+RF\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+HV\s+MOSFETs\s+for\s+RF\s*$/: 39 ]

Total 39 documents matching your query.

21. Re: [Amps] HV MOSFETs for RF (score: 1): Author: "Leigh Turner" <invertech@frontierisp.net.au>; Date: Wed, 10 May 2017 11:23:45 +0930; Yeah Peter's Class-A amp is likely run with considerable back-off so the expected efficiency figures seem worse. Nevertheless I'm sure it runs squeaky-clean with very low IMD at 25 Watts PEP. The "av; /archives//html/Amps/2017-05/msg00102.html (12,552 bytes)
22. Re: [Amps] HV MOSFETs for RF (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Wed, 10 May 2017 01:59:50 -0400; I disagree with the assessment of the drive for low IMD, mainly because it does not identify low transmitter IMD, compared to realistic numbers. There is no excuse for today's commercial rigs produci; /archives//html/Amps/2017-05/msg00103.html (15,007 bytes)
23. [Amps] HV MOSFETs for RF (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Wed, 10 May 2017 06:54:51 -0700; <Yeah Peter's Class-A amp is likely run with considerable back-off so the <expected efficiency figures seem worse. Nevertheless I'm sure it runs <squeaky-clean with very low IMD at 25 Watts PEP. The; /archives//html/Amps/2017-05/msg00104.html (13,630 bytes)
24. Re: [Amps] HV MOSFETs for RF (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Wed, 10 May 2017 14:31:56 +0000 (UTC); "Problem is, the typical 140 db MDS of today's xcvrs is rendered useless, since the noise floor in urban areas is way higher than that." Yes, this is why those of us in rural areas need an amp more t; /archives//html/Amps/2017-05/msg00105.html (9,339 bytes)
25. Re: [Amps] HV MOSFETs for RF (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Wed, 10 May 2017 16:17:26 +0000; Jim, main 100 watt pa need a serious re-design. What exactly would you improve in that design? I just had a look at those schematics. The driver section looks pretty OK to me, while the 100W amp suff; /archives//html/Amps/2017-05/msg00106.html (9,002 bytes)
26. Re: [Amps] HV MOSFETs for RF (score: 1): Author: "Kevin Stover, AC0H" <kstover@ac0h.net>; Date: Wed, 10 May 2017 19:01:40 -0500; All, IMHO the problem with today's 100W radios is that they are designed for 12V finals. Comparing a "modern" solid state radio designed to run on 12V finals to a Collins 32S-3 is borderline ridiculo; /archives//html/Amps/2017-05/msg00108.html (11,024 bytes)
27. Re: [Amps] HV MOSFETs for RF (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Thu, 11 May 2017 01:27:27 +0000; -- ORIGINAL MESSAGE --(may be snipped) REPLY: It says more about the poster than the rig. 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com http://l; /archives//html/Amps/2017-05/msg00109.html (8,107 bytes)
28. [Amps] HV MOSFETs for RF (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Thu, 11 May 2017 10:18:11 -0700; <REPLY It says more about the poster than the rig. 73, Bill W6WRT from 12-25 % sales tax, plus shipping, and thats what the rest of the planet pays for this junk. Then cross your fingers that UPS, FE; /archives//html/Amps/2017-05/msg00110.html (8,967 bytes)
29. Re: [Amps] HV MOSFETs for RF (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Thu, 11 May 2017 17:26:35 +0000 (UTC); What is that flaw in most 100W radios, Manfred? 73, Cathy N5WVR _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2017-05/msg00111.html (8,696 bytes)
30. [Amps] HV MOSFETs for RF (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Thu, 11 May 2017 10:28:36 -0700; <All, <IMHO the problem with today's 100W radios is that they are designed for <12V finals. Comparing a "modern" solid state radio designed to run on <12V finals to a Collins 32S-3 is borderline ridi; /archives//html/Amps/2017-05/msg00112.html (9,815 bytes)
31. Re: [Amps] HV MOSFETs for RF (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Thu, 11 May 2017 13:49:19 -0400; home about.... go for it. Ditto with the 400w yaesu FT-9000MPs 12 dbc IMD3. " For the last two weeks, I've been testing the new ANAN 8000DLE. Worst-case IMD at 200W is -75 dBc and close to -80 dBc o; /archives//html/Amps/2017-05/msg00113.html (8,626 bytes)
32. Re: [Amps] HV MOSFETs for RF (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Thu, 11 May 2017 18:21:01 +0000; Kevin, I don't think so...! 12V 100W amplifiers do have their place - in mobile rigs. Although nowadays it does make sense to use a DC-DC converter to raise the 12V to something more convenient, the; /archives//html/Amps/2017-05/msg00114.html (12,298 bytes)
33. Re: [Amps] HV MOSFETs for RF (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Fri, 12 May 2017 02:09:05 +0000; Cathy, What is that flaw in most 100W radios, Manfred? It's the lack of coupling between the two sides (the two drains, or collectors) of the push-pull stage. In linear class AB or B push-pull stages; /archives//html/Amps/2017-05/msg00115.html (9,255 bytes)
34. [Amps] HV MOSFETs for RF (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Fri, 12 May 2017 07:50:03 -0700; home about.... go for it. Ditto with the 400w yaesu FT-9000MPs ?12 dbc IMD3. " <<<<For the last two weeks, I've been testing the new ANAN 8000DLE. Worst-case IMD at 200W is -75 dBc and close to -80 d; /archives//html/Amps/2017-05/msg00117.html (10,848 bytes)
35. Re: [Amps] HV MOSFETs for RF (score: 1): Author: Roger D Johnson <n1rj@roadrunner.com>; Date: Fri, 12 May 2017 12:01:27 -0400; My new 1.3K-FA uses a MRF1K50H output LDMOS transistor. Does anyone know how long it would take to destroy the gate junction under overdrive conditions. Is there any system fast enough to prevent des; /archives//html/Amps/2017-05/msg00118.html (8,019 bytes)
36. Re: [Amps] HV MOSFETs for RF (score: 1): Author: Ken K6MR <k6mr@outlook.com>; Date: Fri, 12 May 2017 17:33:20 +0000; whats needed now is to get current SS and tube amp manufactures to include a sampled output. The new Elecraft KPA-1500 has the sample output. Ken K6MR home about.... go for it. Ditto with the 400w ya; /archives//html/Amps/2017-05/msg00119.html (12,135 bytes)
37. Re: [Amps] HV MOSFETs for RF (score: 1): Author: "Doug Ronald" <doug@dougronald.com>; Date: Fri, 12 May 2017 10:39:56 -0700; A "Tandem Match" coupler is easy and fun to build. The coupling factor is based on a turns ratio with 30 to 40 dB typical. An advantage is that the reflected power is also available. If you home make; /archives//html/Amps/2017-05/msg00120.html (12,445 bytes)
38. Re: [Amps] HV MOSFETs for RF (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Fri, 12 May 2017 12:20:28 -0600; I show how to construct a simple 40-dB, RF SAmpler that will easily handle 1500 watts. It is printed in the ARRL handbook under Construction Projects in the Test Equipment and Measurements section. T; /archives//html/Amps/2017-05/msg00121.html (13,374 bytes)
39. Re: [Amps] HV MOSFETs for RF (score: 1): Author: Steve Thompson <g8gsq72@gmail.com>; Date: Sat, 13 May 2017 08:52:35 +0100; In terms of damaging the actual gate with overdrive, I think there's no meaningful time limit, it's all but instantaneous if it happens. For the whole device in overload, it depends on the circumstan; /archives//html/Amps/2017-05/msg00123.html (8,505 bytes)

Current List: 21 - 39
Page: [1] [2]