Mail Archive Search: <+from:manfred@ludens.cl>

Results:

References: [ +from:manfred@ludens.cl: 419 ]

Total 419 documents matching your query.

201. Re: [Amps] Solid State Amps (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Sat, 18 Oct 2014 17:23:13 +0000; Chris, The industry standard dot matrix display is a great idea, but what chance manufacturers agree to such a selfless act of kindness to us end users? ;) Individuality has its costs... I'm not sure; /archives//html/Amps/2014-10/msg00169.html (10,034 bytes)
202. Re: [Amps] Solid State Amps (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Sat, 18 Oct 2014 21:20:18 +0000; Jeff, Interesting contribution, and I will comment on many of your points. PC water cooling technology is able to get rid of 150W of CPU heat from a 1 cm die with only 10-20 degrees of temperature ri; /archives//html/Amps/2014-10/msg00174.html (45,382 bytes)
203. Re: [Amps] Solid State Amps (or rather the NCL-2000...) (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Sun, 19 Oct 2014 17:17:08 +0000; Carl, There are alternatives Manfred. Get a pair of 8072's and some defunct 8122's. Machine off the finned radiator and push onto the 8072. That's a good hint. I had read it before somewhere, but for; /archives//html/Amps/2014-10/msg00190.html (10,452 bytes)
204. Re: [Amps] Solid State Amps (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Sun, 19 Oct 2014 17:53:19 +0000; Roger, Small, generic LCD screens could be produced for pennies, or at most, a few dollars as you can now purchase a 40" smart HD TV receiver for $300-$400. It's a matter of checking what a simple ce; /archives//html/Amps/2014-10/msg00192.html (16,174 bytes)
205. Re: [Amps] Class E amps (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Tue, 21 Oct 2014 18:28:05 +0000; Bill, Several years ago during a RTTY contest on 40 meters I noticed a weird hash noise covering the entire band. It would come and go with a timing like someone was calling CQ. Tuning around, I foun; /archives//html/Amps/2014-10/msg00211.html (10,289 bytes)
206. Re: [Amps] Solid State Amps (or rather the NCL-2000...) (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Tue, 21 Oct 2014 18:34:05 +0000; Carl, I do that, whenever I use any mode that doesn't require envelope linearity! As I set the bias, it's class AB1, pretty close to B, in SSB position, and deep into class C in CW position. With the; /archives//html/Amps/2014-10/msg00212.html (8,301 bytes)
207. Re: [Amps] Solid State Amps (or rather the NCL-2000...) (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Tue, 21 Oct 2014 18:53:05 +0000; Jim, Gary, I too use my Bose QC-15s in the shack for contesting. With 2 amplifiers running, it really helps! About 15 years ago, when I was seriously into powered paraglider flying, I glued headphone; /archives//html/Amps/2014-10/msg00213.html (11,958 bytes)
208. Re: [Amps] Solid State Amps (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Tue, 21 Oct 2014 18:59:25 +0000; Carl, With all your spare time how about coming up with a substitution chart plus what changes are needed for a wide range of RF devices that are no longer in production with some unobtainium? This w; /archives//html/Amps/2014-10/msg00214.html (8,982 bytes)
209. Re: [Amps] SOTA Solid State amplifiers (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Tue, 21 Oct 2014 19:26:21 +0000; John, and all, There is another group online on AM phone that does a lot of class E transmitter development, and they too are using plastic switchmode devices in new ways. Using class E (or D, or F); /archives//html/Amps/2014-10/msg00215.html (12,457 bytes)
210. Re: [Amps] Class E amps (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Wed, 22 Oct 2014 00:38:58 +0000; Dick, Got any suggestions as to which devices meet your criteria ? Among the ones I tried, the best was the IXTP1R6N50P. In class AB, at decent IMD levels, I could obtain a power output from 60 watt; /archives//html/Amps/2014-10/msg00218.html (10,747 bytes)
211. Re: [Amps] Nonlinear Thoughts (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Thu, 23 Oct 2014 15:21:45 +0000; Marv, After much consideration, I've abandoned the idea of using solid state devices in an Envelope Modulated configuration. Was this decision caused by the voltage-variable capacitances in them, or; /archives//html/Amps/2014-10/msg00220.html (19,762 bytes)
212. Re: [Amps] Alpha 8410 using 4CX1500B - why? (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Wed, 29 Oct 2014 21:03:21 +0000; To all tube specialists out there, I wonder whether the 4CX1500B is _intrinsically_ a low distortion tube, by any special construction techniques, or if the good IMD rating comes simply from the oper; /archives//html/Amps/2014-10/msg00239.html (11,901 bytes)
213. Re: [Amps] Old Moto RF Decks (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Tue, 02 Dec 2014 20:06:14 +0000; Carl, Now when is Freescale going to offer a 2-30 or 2-50 mHz device that has high efficiency and very low IMD at the same time and be targeted at the linear SSB amp market? Freescale provides you th; /archives//html/Amps/2014-12/msg00014.html (9,779 bytes)
214. Re: [Amps] Old Moto RF Decks (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Thu, 04 Dec 2014 13:25:50 +0000; Carl, SS QRO development has been slow and commercial user requirements have driven it, HF is a small market these days and the money is at VHF and up. And there is more money in medical equipment, t; /archives//html/Amps/2014-12/msg00018.html (10,556 bytes)
215. [Amps] Linearization problem (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Thu, 04 Dec 2014 14:05:18 +0000; Attention to all technically minded amp'ers! Maybe somebody has a good idea, that could contribute to some work I'm doing, which might end up being useful for the ham community. First I will explain; /archives//html/Amps/2014-12/msg00019.html (10,739 bytes)
216. Re: [Amps] Linearization problem (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Thu, 04 Dec 2014 18:12:39 +0000; Hi Marv, Directional coupler. I don't see how that could work. Indeed, if there was such a thing as a near-perfect directional coupler, in which the signal apearing on the side port depends _only_ on; /archives//html/Amps/2014-12/msg00026.html (8,550 bytes)
217. Re: [Amps] Linearization problem (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Fri, 05 Dec 2014 14:18:19 +0000; Peter, I use a bird sampler http://www.birdrf.com/Products/Components/Variable-Signal-Samplers/4273-Seri es_15-35-MHz-Variable-RF-Signal-Samplers.aspx That one is non-directional. It's a plain simple; /archives//html/Amps/2014-12/msg00035.html (17,674 bytes)
218. Re: [Amps] High Voltage Wire (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Tue, 20 Jan 2015 23:38:20 +0000; When I need some high voltage wire, I look into my box of coax cable scraps. I always find something suitable. Humble RG-59 is rated for 2300V rms, that's over 3.2kV DC. In many cases that's enough.; /archives//html/Amps/2015-01/msg00187.html (7,802 bytes)
219. Re: [Amps] {Collins} Understanding Screen Current in a Tetrode (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Wed, 28 Jan 2015 13:35:41 +0000; Under the assumption that the guys who designed and built amplifiers for sale knew pretty well what they were doing, it might be a good idea to simply look into the user manuals of some tetrode ampli; /archives//html/Amps/2015-01/msg00337.html (11,419 bytes)
220. [Amps] What tube? (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Wed, 28 Jan 2015 14:00:46 +0000; A question to all those of you who have used many different tubes: What tube(s) would you recommend for a legal limit HF amplifier, to get as close as possible to the following goals: - Class AB2 ope; /archives//html/Amps/2015-01/msg00338.html (7,483 bytes)

Current List: 201 - 220
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]