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61. Re: [Amps] Price per Watt Conversation (score: 1): Author: "Ian White" <gm3sek@ifwtech.co.uk>; Date: Wed, 26 Apr 2017 08:38:44 +0100; I The main problem with the Quadra PS is its tendency to blow the step-start resistors (R2A, B, C) that limit the startup surge current. This is caused by two design errors, both of which can easily; /archives//html/Amps/2017-04/msg00289.html (10,635 bytes)
62. Re: [Amps] Price per Watt Conversation (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Wed, 26 Apr 2017 04:28:11 -0400; Unfortunately, the exams are going the other way with very little required in the was of technology ans theory. They have dumbed down the exams to where, I think my Novice test had more theory than a; /archives//html/Amps/2017-04/msg00291.html (12,855 bytes)
63. Re: [Amps] Price per Watt Conversation (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Wed, 26 Apr 2017 04:35:32 -0400; And on the same thread there are a number of thank yous, particularly to Manfred for explaining the subject in a manner that can be understood to which I'll add mine as Manfred has given this old bip; /archives//html/Amps/2017-04/msg00292.html (10,366 bytes)
64. Re: [Amps] Price per Watt Conversation (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Wed, 26 Apr 2017 04:38:20 -0400; Thanks Ian! 73, Roger (K8RI) At close to 200W per device, it would require 8 devices in a circuit much like the Yaesu Quadra, but with a legal limit out for less money. BTW I saw several posts praisi; /archives//html/Amps/2017-04/msg00294.html (11,711 bytes)
65. [Amps] Price per Watt Conversation (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Wed, 26 Apr 2017 08:30:33 -0700; REPLY: Cost. 50 VDC 3 kW supplies are available on eBay dirt cheap. Obsolete telephone equipment. 73, Bill W6WRT were 3 kw CCS rated, and would work from 40-70 hz. Some were designed for 208 vac sing; /archives//html/Amps/2017-04/msg00298.html (11,221 bytes)
66. Re: [Amps] Price per Watt Conversation (score: 1): Author: Richard Solomon <dickw1ksz@gmail.com>; Date: Wed, 26 Apr 2017 08:33:54 -0700; And now with the new 65 vdc LDMOS devices, all those 50 vdc units are obsolete. Progress ... 73, Dick, W1KSZ _______________________________________________ Amps mailing list Amps@contesting.com http; /archives//html/Amps/2017-04/msg00299.html (12,681 bytes)
67. [Amps] Price per Watt Conversation (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Wed, 26 Apr 2017 09:38:50 -0700; And now with the new 65 vdc LDMOS devices, all those 50 vdc units are obsolete. Progress ... 73, Dick, W1KSZ up to as high as 60 vdc. Jim VE7RF _______________________________________________ Amps ma; /archives//html/Amps/2017-04/msg00301.html (8,377 bytes)
68. Re: [Amps] Price per Watt Conversation (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Wed, 26 Apr 2017 16:49:56 +0000; -- ORIGINAL MESSAGE --(may be snipped) REPLY: I have to disagree with the above. The pressing need for hams today is not technology and theory but rather operating skill. Few hams today are into desi; /archives//html/Amps/2017-04/msg00302.html (9,970 bytes)
69. Re: [Amps] Price per Watt Conversation (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Wed, 26 Apr 2017 17:09:13 +0000; -- ORIGINAL MESSAGE --(may be snipped) REPLY: Not really obsolete. Just add a 13.8 VDC supply in series. Close enough. 73, Bill W6WRT _______________________________________________ Amps mailing list; /archives//html/Amps/2017-04/msg00303.html (8,792 bytes)
70. Re: [Amps] Price per Watt Conversation (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Wed, 26 Apr 2017 15:47:24 -0400; obsolete." The Eltek Flatpack2 can be programmed to at least +60V. We're in a new world with these devices and advances are rapidly made each day. Yesterday, it was +50V, today it's 65V, tomorrow 75; /archives//html/Amps/2017-04/msg00309.html (8,419 bytes)
71. Re: [Amps] Price per Watt Conversation (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Wed, 26 Apr 2017 20:56:33 +0000 (UTC); When we get to 3000V, we can have drop-in replacements for our tube amplifier finals! :-) 73, Cathy N5WVR -- Paul Christensen <w9ac@arrl.net> wrote: Yesterday, it was +50V, today it's 65V, tomorrow 7; /archives//html/Amps/2017-04/msg00311.html (8,591 bytes)
72. Re: [Amps] Price per Watt Conversation (score: 1): Author: <w8hw@comcast.net>; Date: Wed, 26 Apr 2017 18:12:05 -0400; In my 40 + years in transmitter repair, I have repaired hundreds of Solid State amplifiers and less than that tube amplifiers. Most people have the idea of tube Obsolescence is a problem and that is; /archives//html/Amps/2017-04/msg00313.html (10,146 bytes)
73. Re: [Amps] Price per Watt Conversation (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Wed, 26 Apr 2017 19:43:35 -0400; Has the FCC changed the reason for tha Amateur Radio "Service"? You gave a reason, but did not deny the dumbing down part.. 73, Roger (K8RI) Unfortunately, the exams are going the other way with very; /archives//html/Amps/2017-04/msg00316.html (11,598 bytes)
74. Re: [Amps] Price per Watt Conversation (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Wed, 26 Apr 2017 20:02:55 -0400; There is no Pressing Need for more hams period other than save jobs and sell more paper products at the ARRL. Just listen to the bands and tell me even CB is often more in control! And forget about F; /archives//html/Amps/2017-04/msg00318.html (11,699 bytes)
75. Re: [Amps] Price per Watt Conversation (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Thu, 27 Apr 2017 01:03:59 +0000; -- ORIGINAL MESSAGE --(may be snipped) REPLY: Not denying it. When I took my Technician test in 1957 I was required to hand draw a simple tube oscillator. That is no longer required so you could say; /archives//html/Amps/2017-04/msg00320.html (10,316 bytes)
76. Re: [Amps] Price per Watt Conversation (score: 1): Author: Bob Darlington <rdarlington@gmail.com>; Date: Thu, 27 Apr 2017 14:35:51 -0600; Agreed! Proficiency testing on a representative sampling of modes should be on the test. J-mode satellite work. JT65 or similar dsp driven digital mode, phone. Can't get a computer to work with your; /archives//html/Amps/2017-04/msg00348.html (11,706 bytes)
77. Re: [Amps] Price per Watt Conversation (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Mon, 01 May 2017 20:08:32 +0000; Cathy, When we get to 3000V, we can have drop-in replacements for our tube amplifier finals! :-) That would be fun... :-) But not really practical. The high voltage needed for tubes is a nuisance rat; /archives//html/Amps/2017-05/msg00020.html (10,350 bytes)

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