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121. Re: [Amps] Overdrive protection (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Thu, 26 Jul 2012 22:51:22 -0400; The problem is that the transceiver ALC time constant is too slow and the transceiver IF stages have excess gain. Thus the transceiver makes "full power" for the few milliseconds *before* the ALC ca; /archives//html/Amps/2012-07/msg00292.html (10,239 bytes)
122. Re: [Amps] Overdrive protection (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Fri, 27 Jul 2012 10:32:17 -0400; Because many transceivers designers - particularly Icom - control Power with the ALC circuit. That does nothing to stop the spike due to a slow ALC attack time and excess IF gain (excess drive to th; /archives//html/Amps/2012-07/msg00301.html (12,031 bytes)
123. Re: [Amps] Overdrive protection (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Fri, 27 Jul 2012 11:49:28 -0400; Find a separate carrier control in modern transceivers! In general the carrier control is buried in a factory set-up menu as the IF gain on each band and they are often set high specifically to avoi; /archives//html/Amps/2012-07/msg00307.html (13,271 bytes)
124. Re: [Amps] ALC Overshoot FTDX-5000 (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Mon, 13 Aug 2012 21:12:51 -0400; What is the time constant of the Powermaster? Then only clear way to measure the sub 5 ms spikes is with a scope. 73, ... Joe, W4TV _______________________________________________ Amps mailing list A; /archives//html/Amps/2012-08/msg00190.html (8,928 bytes)
125. Re: [Amps] ALC Overshoot FTDX-5000 (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Mon, 13 Aug 2012 22:45:21 -0400; Not probative - a single dit at 60 WPM is 24 msec. "PARIS" is 42 bit (dot) periods ... 1/42 => 24 ms. Now, if you tell me the Powermaster can measure a single dit at 600 WPM, I will accept it as a r; /archives//html/Amps/2012-08/msg00194.html (10,776 bytes)
126. Re: [Amps] ALC Overshoot FTDX-5000 (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Tue, 14 Aug 2012 01:26:52 -0400; Yes, I missed the "I" when I did the quick calculation. I never remember the number when I need it <G>. In any case it doesn't change the fact that reading the correct power in a 20 or 24 ms period w; /archives//html/Amps/2012-08/msg00196.html (13,356 bytes)
127. Re: [Amps] 87a will tell you, too (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Wed, 15 Aug 2012 09:53:27 -0400; This is another typical lie promulgated by the Elecraft haters. Any "power spike" is simply a matter of improper alignment of the K3 *by the user*. When properly aligned it is not possible for the K; /archives//html/Amps/2012-08/msg00210.html (10,579 bytes)
128. Re: [Amps] K3 spike problem (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Thu, 16 Aug 2012 08:33:04 -0400; Bull roar! The problem is that he is not operating the radio under the same conditions as it was when calibrated at the factory and he has not performed the TX Gain alignment procedure *as documente; /archives//html/Amps/2012-08/msg00245.html (11,822 bytes)
129. Re: [Amps] K3 spike problem (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Thu, 16 Aug 2012 08:59:46 -0400; No, that's not what I said. If Charlie is using a power supply with significantly higher (or lower) voltage than used by the Elecraft factory when the transceiver was built and calibrated, the gain; /archives//html/Amps/2012-08/msg00248.html (14,472 bytes)
130. Re: [Amps] Alpha &&DX Conversion (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Wed, 05 Sep 2012 23:39:04 -0400; Yup, I had another one ... a McMartin with an 8877. 2300W output on 104.9 just outside Columbus, OH while I was in school and my first job out of college. 73, ... Joe, W4TV I worked on a BEXT 2500 wa; /archives//html/Amps/2012-09/msg00075.html (10,268 bytes)
131. Re: [Amps] SS Amp questions (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sun, 09 Sep 2012 16:13:10 -0400; If one looks at both the ALS-600 and ALS-1300 one will find that the amplifier modules are a very close copy of the Granberg (Motorola EB104) design for the MRF-150. Are you casting aspersions on Gr; /archives//html/Amps/2012-09/msg00141.html (8,729 bytes)
132. Re: [Amps] hot keying the amp? (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Wed, 13 Feb 2013 14:45:19 -0500; Except, of course, for the Icom rigs that are still making RF 3 or 4 ms *AFTER* the HSEND line goes high! See data by both W0QE and AD5X. 73, ... Joe, W4TV On 2/11/2013 11:10 PM, Jim W7RY wrote: Wit; /archives//html/Amps/2013-02/msg00107.html (11,409 bytes)
133. Re: [Amps] Molex Pins (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 30 Mar 2013 19:48:45 -0400; The old 24 pin ACC connector is an entirely different animal than the Icom/Kenwood/Yaesu/etc. power connectors which vary all over the map. The ACC connector is Molex and the pin numbers are correct; /archives//html/Amps/2013-03/msg00376.html (10,929 bytes)
134. Re: [Amps] Pre-Distortion Linearizer (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 04 May 2013 10:36:27 -0400; The problem is that manufacturers are not going to be able to produce a "low end transceiver" - at least at the low end price point - that has all the features demanded by the marketplace. The techno; /archives//html/Amps/2013-05/msg00072.html (8,958 bytes)
135. Re: [Amps] The Pin One Problem (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Fri, 07 Jun 2013 11:12:20 -0400; The problem is that it is not a "Ground loop" - there is no issue with multiple grounding if the inputs to the device are designed properly. It occurs only when the signal return is not correctly con; /archives//html/Amps/2013-06/msg00156.html (12,692 bytes)
136. Re: [Amps] The Pin One Problem (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Fri, 07 Jun 2013 15:15:55 -0400; I am quite familiar with the issue and while Dr. Garland may call it a "ground loop", the problem with The W8ZR Station Pro is the same old problem in interfacing with improperly designed amateur equ; /archives//html/Amps/2013-06/msg00166.html (16,885 bytes)
137. Re: [Amps] The Pin One Problem (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Fri, 07 Jun 2013 21:49:22 -0400; Jim, I'm not saying that StationPro *causes* problems. My point is that any external device that provides a path for transceiver supply currents to interact with the mic return will have problems wit; /archives//html/Amps/2013-06/msg00172.html (25,173 bytes)
138. Re: [Amps] The Pin One Problem (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Fri, 07 Jun 2013 23:15:45 -0400; Another flippant remark from someone who prefers to engage in personal attacks rather conduct reasonable discussion about the technology. Then you did not look at the Yaesu FT-1000D, FT-1000MP, FT-1; /archives//html/Amps/2013-06/msg00176.html (21,233 bytes)
139. Re: [Amps] Cable shielding and grounding paper (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 08 Jun 2013 11:28:31 -0400; It is a shame that all of the study was done with a common ground plane and unbalanced connections. In effect, it is most applicable to the connections between separate shielded modules within a sing; /archives//html/Amps/2013-06/msg00181.html (8,356 bytes)
140. Re: [Amps] Using old amps on WARC query (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sun, 30 Jun 2013 10:45:43 -0400; I believe the early PA76 series amps *all* had plate chokes resonant at 25 MHz and will not work on 12 meters. It's been a long time since I last looked at one. 73, ... Joe, W4TV Please anyone can te; /archives//html/Amps/2013-06/msg00277.html (8,620 bytes)

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