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101. Re: [Amps] RF Chokes (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Tue, 18 Jul 2006 12:44:44 -0500; In my building experience over the years with this choke (RF Parts/Ameritron), I have never seen one resonate below 11.5 mhz or go above 12 mhz in all manners of positions and various layouts. It is; /archives//html/Amps/2006-07/msg00584.html (8,625 bytes)
102. Re: [Amps] RF Chokes (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Tue, 18 Jul 2006 13:50:19 -0500; Amen, Norm... Harris has been doing this for years in their amps. The RF-110, (pair of 4CX1500B's) has a plate choke that is a very small ferrite loaded unit that is clean from 1.8-30 mhz. This was; /archives//html/Amps/2006-07/msg00585.html (9,421 bytes)
103. [Amps] FW: RF Chokes (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Tue, 18 Jul 2006 15:53:59 -0500; Subject: RE: [Amps] RF Chokes This is not as bad as many Internet suggested mods are, since the additional C at the bottom of the choke won't hurt. Unfortunately some mods on Websites actually hurt r; /archives//html/Amps/2006-07/msg00593.html (7,569 bytes)
104. [Amps] FW: RF Chokes (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Tue, 18 Jul 2006 15:55:38 -0500; Subject: RE: [Amps] RF Chokes I think they also don't believe that winding gaps can be used to position series resonances. This miss-information has been promulgated in the ARRL Handbook and other so; /archives//html/Amps/2006-07/msg00594.html (6,384 bytes)
105. Re: [Amps] Life and gain of 3-500Z (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Tue, 18 Jul 2006 16:53:03 -0500; Assuming it is correct that the Chinese tubes are higher mu, and higher gain than an Eimac, the zsac would be higher, and the input vswr would change, with the same HV and bias voltages applied? (((; /archives//html/Amps/2006-07/msg00597.html (8,857 bytes)
106. Re: [Amps] RF Chokes (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Tue, 18 Jul 2006 17:00:06 -0500; The proof of the pudding is that the choke designed by W8JI (Ameritron/RF Parts is the only solenoid-wound choke that is good for 9 bands that I have ever encountered. The only explanation I can come; /archives//html/Amps/2006-07/msg00598.html (10,570 bytes)
107. Re: [Amps] Hi Mu correction (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Wed, 19 Jul 2006 13:04:57 -0500; less at a given bias voltage. A 3CX3000A7 running @ 4800-5000 volts on the anode in class AB2 (cathode driven) idles @ c. 350 ma ZSAC, with zero bias applied. With a drive impedance of 50 ohms, and i; /archives//html/Amps/2006-07/msg00642.html (7,992 bytes)
108. Re: [Amps] font sizes (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Fri, 21 Jul 2006 11:20:55 -0500; I use Microsoft Outlook here, Bob. Holding the control key down while moving the scroll wheel on the mouse does the job in my case. (((73))) Phil Clements, K5PC _____________________________________; /archives//html/Amps/2006-07/msg00777.html (7,377 bytes)
109. Re: [Amps] Fw: "Tubes 201" - How Vacuum Tubes Really Work (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Tue, 25 Jul 2006 09:31:27 -0500; Correctamundo! Here is where you are confusing the folks. More positive is above ZERO volts. Less negative is below ZERO volts. Anything that is negative or less negative cannot become more positive; /archives//html/Amps/2006-07/msg01081.html (8,596 bytes)
110. Re: [Amps] "Tubes 201" - How Vacuum Tubes Really Work (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Tue, 25 Jul 2006 09:36:17 -0500; Instead of using the word "either," why not use "such as" so you don't lead folks to think there can be only two causes of excessive grid current? (((73))) Phil Clements, K5PC ______________________; /archives//html/Amps/2006-07/msg01082.html (10,506 bytes)
111. Re: [Amps] Ameritron Amps (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Mon, 31 Jul 2006 02:11:38 -0500; Mike, I have used my Ameritron QSK-5 for several years with my Icom 706MKII and my Henry SS-750 solid state amp; both mobile and here in the shack. They have performed flawlessly. If I ever buy anot; /archives//html/Amps/2006-07/msg01418.html (10,203 bytes)
112. Re: [Amps] Plasma Thermo HFS 3000D (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Mon, 31 Jul 2006 14:06:59 -0500; Larry, I have converted several 3 phase Henry 2000D's. I have one sitting right here in the shack running on 160 meters as a single-band unit. When you float the center secondary winding on the powe; /archives//html/Amps/2006-07/msg01445.html (8,477 bytes)
113. Re: [Amps] grid resonance (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Mon, 7 Aug 2006 07:14:44 -0500; Ian, Are you saying that a GDO can only dip a "circuit?" (((73))) Phil, K5PC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman; /archives//html/Amps/2006-08/msg00247.html (8,477 bytes)
114. Re: [Amps] grid resonance (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Mon, 7 Aug 2006 10:33:27 -0500; I agree with all of the above. Someone should have said this about 75 posts back to enlighten the multitudes of readers on the reflector. About 50% of the questions would not have had to be answered; /archives//html/Amps/2006-08/msg00257.html (9,858 bytes)
115. Re: [Amps] Tuned Input - IMD and efficiency (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Tue, 8 Aug 2006 17:46:23 -0500; A trick my Elmer showed me many years ago on a 4-1000A was to put a 25pf cap in series with a 10 ohm resistor from each filament pin to chassis ground using short leads. This really tames this savag; /archives//html/Amps/2006-08/msg00307.html (9,584 bytes)
116. Re: [Amps] Tuned Input - IMD and efficiency (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Tue, 8 Aug 2006 19:33:45 -0500; Years ago, Eimac-Varian manufactured large RF generators for industrial use. I was able to purchase a supply of the Eimac in-house parasitic suppressors that they used on their 4-1000A generators. I; /archives//html/Amps/2006-08/msg00313.html (10,159 bytes)
117. Re: [Amps] Tuned Input - IMD and efficiency (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Wed, 9 Aug 2006 09:02:18 -0500; Henry Radio came up with the novel idea on the 8K-Ultra. A large brass strap was wound into a single turn, and heavily chrome plated. This serves as the parasitic suppressor on the 3CX3000A7. No add; /archives//html/Amps/2006-08/msg00332.html (7,740 bytes)
118. Re: [Amps] Spam from Members of this List ... (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Wed, 9 Aug 2006 09:10:51 -0500; Part of the problem is that when you hit the "reply" button, it gives you the address of the sender, not the reflector. To reply to the reflector only, I have to hit the "reply to all" button, and t; /archives//html/Amps/2006-08/msg00333.html (9,470 bytes)
119. Re: [Amps] Spam from Members of this List ... (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Wed, 9 Aug 2006 23:58:06 -0500; One of my pet peeves is getting a post that is full of prior comments with attribution marks, but with no new comments from the last sender. It's just an edited recap of what several guys said in ea; /archives//html/Amps/2006-08/msg00379.html (9,896 bytes)
120. Re: [Amps] AL-80B Trouble (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Sat, 26 Aug 2006 05:38:29 -0500; Mike: Just call RF Parts. They are very reputable and honest, IMO, and since they sell both brands, just ask them which one has the best track record on warranty replacement. The last time I bought; /archives//html/Amps/2006-08/msg00672.html (8,745 bytes)

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