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1. [Amps] LDMOS availability (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Mon, 5 Jun 2017 09:18:34 -0600; I recently took part in a webinar on the new, 1800 watt, 65 volt, LDMOS transistors made by NXP. It is the MRFX1K80, and NXP plans to produce it for at least 15 years. Tom W0IVJ _____________________; /archives//html/Amps/2017-06/msg00041.html (6,755 bytes)
2. Re: [Amps] LDMOS availability (score: 1): Author: <w8hw@comcast.net>; Date: Mon, 5 Jun 2017 13:08:49 -0400; Talk is cheep. Ask them if they will put that in writing? Also ask if they will put a penalty clause stating they will give you a $100k payment should they fail the 15 year test. After all if it was; /archives//html/Amps/2017-06/msg00047.html (9,320 bytes)
3. Re: [Amps] LDMOS availability (score: 1): Author: Tom Osborne <w7why1@gmail.com>; Date: Mon, 5 Jun 2017 11:16:26 -0700; If people keep buying them If there is no market, how long do you think they will produce them?? In 15 years they will be obsolete and a new kid n the block will come along. Just look back 15 years a; /archives//html/Amps/2017-06/msg00054.html (7,703 bytes)
4. Re: [Amps] LDMOS availability (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Mon, 5 Jun 2017 18:49:38 +0000 (UTC); Just because people keep buying them doesn't mean they'll continue to be made. Many products are replaced with a next-generation, not-necessarily-backward-compatible product while demand is still str; /archives//html/Amps/2017-06/msg00055.html (7,929 bytes)
5. Re: [Amps] LDMOS availability (score: 1): Author: Per Molund <pmolund@online.no>; Date: Mon, 05 Jun 2017 20:55:01 +0200; Actually they have put it in writing, on the data sheet (although prelimenary at the moment) they state 'Included in NXP product longevity program with assured supply for a minimum of 15 years after; /archives//html/Amps/2017-06/msg00057.html (10,672 bytes)
6. Re: [Amps] LDMOS availability (score: 1): Author: <w8hw@comcast.net>; Date: Mon, 5 Jun 2017 19:12:30 -0400; Actually you do NOT have your crystal ball to predict the future so your statement is NOT based in fact, only an opinion. I prefer to go with facts, so hear we go. FACT... Because we can not see into; /archives//html/Amps/2017-06/msg00065.html (13,263 bytes)
7. Re: [Amps] LDMOS availability (score: 1): Author: Larry Benko <xxw0qe@comcast.net>; Date: Mon, 5 Jun 2017 18:40:26 -0600; Bruce, The MRF-150 came out in 1983/84 and Helge Granberg produced the Motorola app not EB-104 using the XRF-150 in the same year. It is still readily available. Be careful with your FACTS! Larry, W0; /archives//html/Amps/2017-06/msg00069.html (13,670 bytes)
8. Re: [Amps] LDMOS availability (score: 1): Author: <w8hw@comcast.net>; Date: Mon, 5 Jun 2017 22:54:55 -0400; Larry, You made and proved my point for me. The transistor you mention is NOT an 1400 watt class (as I specified in the email) in fact your transistor is not even close, it is closer to 140 watt out; /archives//html/Amps/2017-06/msg00074.html (14,870 bytes)
9. Re: [Amps] LDMOS availability (score: 1): Author: "Kevin Stover, AC0H" <kstover@ac0h.net>; Date: Tue, 6 Jun 2017 17:16:06 -0500; OK, name some 1400W solid state devices and they're first date of manufacture. Seems to me they didn't exist until a few years ago. You don't like solid state....we get it. People didn't like cars an; /archives//html/Amps/2017-06/msg00098.html (16,045 bytes)
10. Re: [Amps] LDMOS availability (score: 1): Author: <w8hw@comcast.net>; Date: Tue, 6 Jun 2017 18:29:53 -0400; Kevin you DON'T get it at all. You could not be MORE wrong, I DO love solid state. I have repaired more solid state amps than tube and I bet way more than you have repaired. IT is just that everythin; /archives//html/Amps/2017-06/msg00099.html (17,388 bytes)
11. Re: [Amps] LDMOS availability (score: 1): Author: Merv Schweigert via Amps <amps@contesting.com>; Date: Tue, 6 Jun 2017 12:42:42 -1000; Cant quote you the device numbers, but have seen KW plus MOSFETS around since the middle to late 1990s. When I purchased this AM station property there was a Harris 50KW chugging along, it used 50 MO; /archives//html/Amps/2017-06/msg00100.html (16,977 bytes)
12. Re: [Amps] LDMOS availability (score: 1): Author: Gary K9GS <garyk9gs@wi.rr.com>; Date: Tue, 6 Jun 2017 18:19:15 -0500; So did you keep the transmitter Merv?? :) On 6/6/2017 5:42 PM, Merv Schweigert via Amps wrote: Cant quote you the device numbers, but have seen KW plus MOSFETS around since the middle to late 1990s.; /archives//html/Amps/2017-06/msg00101.html (17,958 bytes)
13. Re: [Amps] LDMOS availability (score: 1): Author: Merv Schweigert via Amps <amps@contesting.com>; Date: Tue, 6 Jun 2017 14:12:35 -1000; The solid state MW50 was moved to GA to a station there, I kept the old tube MW50, it used 4cx35000 tubes, and parted it out. Junked the HV tranny as it was starting to leak oil and was PCB infected.; /archives//html/Amps/2017-06/msg00102.html (18,624 bytes)
14. Re: [Amps] LDMOS availability (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Wed, 7 Jun 2017 01:14:14 -0400; Merv touched on a very important point. These SS devices are built for a specific purpose and industry market that will purchase enough to cover the high cost of development and show a profit. Few we; /archives//html/Amps/2017-06/msg00104.html (22,481 bytes)
15. Re: [Amps] LDMOS availability (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Wed, 7 Jun 2017 13:20:06 +0000 (UTC); That was my initial reaction too, but several people on the list pointed out a range of commercial markets where linear operation is important, so this may be less of an issue than I thought. 73, Cat; /archives//html/Amps/2017-06/msg00107.html (8,483 bytes)
16. Re: [Amps] LDMOS availability (score: 1): Author: "Jeff DePolo" <jd0@broadsci.com>; Date: Wed, 7 Jun 2017 12:21:00 -0400; Harris DX50 probably? But if it were a DX50, the design was such that the modules weren't operated separately for RF and modulation. The amplifier modules all ran at RF, and they were individually s; /archives//html/Amps/2017-06/msg00111.html (10,607 bytes)
17. Re: [Amps] LDMOS availability (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Wed, 07 Jun 2017 17:29:50 +0000; Roger, and all, I'm becoming attached to the idea that the word "linear" should be banned from the advertising Ham Amps, unless they (the seller) can show proof that the amp is truly linear, neglecti; /archives//html/Amps/2017-06/msg00112.html (11,526 bytes)
18. Re: [Amps] LDMOS availability (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Wed, 7 Jun 2017 20:03:01 +0000; -- ORIGINAL MESSAGE --(may be snipped) REPLY: An FM amp can be linear or not, doesn't matter except for efficiency. 73, Bill W6WRT _______________________________________________ Amps mailing list Am; /archives//html/Amps/2017-06/msg00113.html (8,400 bytes)
19. Re: [Amps] LDMOS availability (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Wed, 7 Jun 2017 20:04:45 +0000; -- ORIGINAL MESSAGE --(may be snipped) REPLY: If you're varying the bias to make it linear, it's no longer Class C. 73, Bill W6WRT _______________________________________________ Amps mailing list Am; /archives//html/Amps/2017-06/msg00114.html (8,172 bytes)
20. Re: [Amps] LDMOS availability (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Thu, 08 Jun 2017 02:34:36 +0000; Bill, A linear class C amp is quite a trick. Yes, it's tricky, but it can be done. Variable bias controlled by an error amplifying loop is one way to do it. REPLY: If you're varying the bias to make; /archives//html/Amps/2017-06/msg00116.html (10,397 bytes)

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