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1. [Amps] Future of RF AMPS (score: 1): Author: donroden@hiwaay.net; Date: Tue, 10 Sep 2013 12:03:22 -0500; Gold-Clamp Transistors -- Gold Clamp allows RF transistors to be changed in minutes with only a screwdriver and without needing a soldering iron. Should a transistor fail, several screws are removed,; /archives//html/Amps/2013-09/msg00009.html (7,540 bytes)
2. Re: [Amps] Future of RF AMPS (score: 1): Author: Richard Solomon <dickw1ksz@gmail.com>; Date: Tue, 10 Sep 2013 17:29:25 -0700; I doubt I'll see this filter down to Ham Amps in my lifetime. I'm still waiting for a decent SS Amp that runs 1.5 KW out and does not cost a fortune. 73, Dick, W1KSZ _________________________________; /archives//html/Amps/2013-09/msg00016.html (9,872 bytes)
3. Re: [Amps] Future of RF AMPS (score: 1): Author: "Leigh Turner" <invertech@frontierisp.net.au>; Date: Wed, 11 Sep 2013 10:21:12 +0930; Dick, there's no need to wait for such innovations in RF power semiconductors as such a long awaited low cost S.S. 1.5 kW HF amp can be economically homebrewed using a readily available multiplicity; /archives//html/Amps/2013-09/msg00017.html (9,814 bytes)
4. Re: [Amps] Future of RF AMPS (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Wed, 11 Sep 2013 02:58:50 +0200; I am still waiting to see a review of a SS amp that is as good as the last generation of tube amps when one looks at the generation of high order IM products. With pre-distortion and a totally digita; /archives//html/Amps/2013-09/msg00018.html (11,853 bytes)
5. Re: [Amps] Future of RF AMPS (score: 1): Author: Larry <larry@w7iuv.com>; Date: Tue, 10 Sep 2013 18:18:05 -0700; On 10-Sep-13 5:51 PM, Leigh Turner wrote:using a readily available multiplicity (6 devices in parallel/push-pull) of cheap 50V MOSFETS sourced from the surplus market. Leigh, Exactly which cheap MOSF; /archives//html/Amps/2013-09/msg00020.html (7,701 bytes)
6. Re: [Amps] Future of RF AMPS (score: 1): Author: "Jerry" <jsternmd@att.net>; Date: Tue, 10 Sep 2013 21:37:40 -0400; I am continuing my learning curve to be tech-saavy and would love to build a 50V SS amp instead of playing with HV supplies and ceramic tetrodes. Where does one start? 73 Jerry K1JOS ________________; /archives//html/Amps/2013-09/msg00023.html (7,421 bytes)
7. Re: [Amps] Future of RF AMPS (score: 1): Author: "Leigh Turner" <invertech@frontierisp.net.au>; Date: Wed, 11 Sep 2013 11:09:07 +0930; Ah now Peter, those esoteric distortion correction linearization features will unfortunately take a considerable time for us to see filter down to the solid-state QRO amplifier systems used in the ha; /archives//html/Amps/2013-09/msg00024.html (11,025 bytes)
8. Re: [Amps] Future of RF AMPS (score: 1): Author: "Leigh Turner" <invertech@frontierisp.net.au>; Date: Wed, 11 Sep 2013 12:25:34 +0930; A good place to start Jerry is having a look at the eBay store of Baruch Zilbershatz, 4Z4RB and some of his neat ideas and ham radio market targeted products for QRO HF amplifier pallets. The underly; /archives//html/Amps/2013-09/msg00027.html (8,661 bytes)
9. Re: [Amps] Future of RF AMPS (score: 1): Author: "Leigh Turner" <invertech@frontierisp.net.au>; Date: Wed, 11 Sep 2013 12:43:59 +0930; Larry, the RF power MOSFETS to which I refer here are the VRF2933 devices from Microsemi. Sometimes one can find surplus and NOS ST Micro SD2933 FETS on eBay at low prices. 4 of these rugged 300 Watt; /archives//html/Amps/2013-09/msg00028.html (8,912 bytes)
10. Re: [Amps] Future of RF AMPS (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Tue, 10 Sep 2013 23:35:53 -0400; Larry, the RF power MOSFETS to which I refer here are the VRF2933 devices from Microsemi. Sometimes one can find surplus and NOS ST Micro SD2933 FETS on eBay at low prices. I've worked with semicondu; /archives//html/Amps/2013-09/msg00029.html (10,111 bytes)
11. Re: [Amps] Future of RF AMPS (score: 1): Author: "Leigh Turner" <invertech@frontierisp.net.au>; Date: Wed, 11 Sep 2013 13:58:53 +0930; Dick, such reproducible cookbook reference designs will inevitably appear in the ARRL Handbook or a QEX article one day; already a capable 250 Watt SS amp with decent specs was published in a recent; /archives//html/Amps/2013-09/msg00030.html (10,029 bytes)
12. Re: [Amps] Future of RF AMPS (score: 1): Author: <dsolberg@wi.rr.com>; Date: Wed, 11 Sep 2013 11:29:37 +0000; Helge Granberg (SK) wrote a Motorola engineering bulletin many years ago, EB104, that used (4) MRF 150's for 600 watts. The circuit board for this is available from CCI, and many hams, myself include; /archives//html/Amps/2013-09/msg00032.html (13,016 bytes)
13. Re: [Amps] Future of RF AMPS (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Wed, 11 Sep 2013 15:59:23 +0000; Dick, I'm still waiting for a decent SS Amp that runs 1.5 KW out and does not cost a fortune. Why wait? Why not build it yourself? The problem is, precisely, that everyone is waiting for other people; /archives//html/Amps/2013-09/msg00035.html (17,821 bytes)
14. Re: [Amps] Future of RF AMPS (score: 1): Author: <dsolberg@wi.rr.com>; Date: Wed, 11 Sep 2013 16:41:26 +0000; While the MOSFETs can output 1200 watts with four in parallel/push-pull, the output transformer ratio will limit the practical output to between 800 and 1KW, using a 9:1 with a 50V power supply. The; /archives//html/Amps/2013-09/msg00036.html (10,863 bytes)
15. Re: [Amps] Future of RF AMPS (score: 1): Author: Richard Solomon <dickw1ksz@gmail.com>; Date: Wed, 11 Sep 2013 11:20:28 -0700; Rumor has it that RF Parts offered a High Power Combiner, but a search of that site does not show it. There are a few Combiners, but no Data to tell what they do. Anyone have a source for a Combiner; /archives//html/Amps/2013-09/msg00037.html (12,309 bytes)
16. Re: [Amps] Future of RF AMPS (score: 1): Author: <dsolberg@wi.rr.com>; Date: Wed, 11 Sep 2013 19:45:32 +0000; Richard, Communication Concepts sells combiners that should work. http://www.communication-concepts.com/index.php/splitter-combiners.html _______________________________________________ Amps mailing; /archives//html/Amps/2013-09/msg00040.html (13,251 bytes)
17. Re: [Amps] Future of RF AMPS (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Wed, 11 Sep 2013 16:05:50 -0400; None of the Communications Concepts two amplifier combiners are rated at 2 KW. They show 4 amplifier (4 port) devices for 2 and 5 KW but the only high power 2 port combiner is rated for only 1 KW. Wh; /archives//html/Amps/2013-09/msg00041.html (14,070 bytes)
18. Re: [Amps] Future of RF AMPS (score: 1): Author: John E Cleeve <g3jvc@jcleeve.idps.co.uk>; Date: Wed, 11 Sep 2013 21:06:53 +0100; Hello Don, I have been following the interesting thread. I tried to use the Communications-Concept link, but there is something wrong, my brower does not like it. I then tried a direct route via Goog; /archives//html/Amps/2013-09/msg00042.html (14,691 bytes)
19. Re: [Amps] Future of RF AMPS (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Wed, 11 Sep 2013 22:09:38 +0200; Manfred, you do have a point BUT My transceiver is a rather old and much modified FT102, using three 6146B tubes in the PA with negative feedback to the driver. The 3rd order IMD is -44dB relative to; /archives//html/Amps/2013-09/msg00043.html (9,777 bytes)
20. Re: [Amps] Future of RF AMPS (score: 1): Author: <dsolberg@wi.rr.com>; Date: Wed, 11 Sep 2013 20:15:32 +0000; John, I don't know what to tell you. I just tried the URL with Internet Explorer and I didn't have any problems. _______________________________________________ Amps mailing list Amps@contesting.com; /archives//html/Amps/2013-09/msg00044.html (16,559 bytes)

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