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61. [Amps] Bias Zener Diodes In Parallel ? (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Thu, 18 Jul 2002 22:11:41 -0500; There comes a time during the building of an amp that one must bite the bullet and actually go to the store and buy the proper component to do the job. The ability to know when those junk-box parts; /archives//html/Amps/2002-07/msg00303.html (9,912 bytes)
62. [Amps] Ameritron (Poor Tech service) (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Thu, 18 Jul 2002 22:17:06 -0500; If I irritated this guy calling needing parts for thier product. He should have told me he was eating lunch and did not have time for my service question. What do u think I received 3 days later? No!; /archives//html/Amps/2002-07/msg00304.html (7,321 bytes)
63. [Amps] suppressors [TSPA] (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Fri, 19 Jul 2002 13:03:06 -0500; The Henry 8-K Ultra uses a large brass strap wound into a coil that is heavily plated with chrome. This is used alone, with no parallel resistance. I have built several amps (3CX3000A7, YC-156) usin; /archives//html/Amps/2002-07/msg00329.html (6,976 bytes)
64. [Amps] Rube Goldberg (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Fri, 19 Jul 2002 13:05:41 -0500; was at hand. He would often go out and buy new parts over the counter. I am so glad you straightened me out on this, Colin! I was told that he got his components from Fibber McGee's closet! (((73))); /archives//html/Amps/2002-07/msg00331.html (6,748 bytes)
65. [Amps] Bias Zener Diodes In Parallel ? (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sat, 20 Jul 2002 13:37:32 -0500; I use the method of protection that Alpha used on the 77-SX/DX series. I select an RFC to place between the tube cathode(s) and the zener that has very small winding; just enough to pass the normal o; /archives//html/Amps/2002-07/msg00363.html (8,780 bytes)
66. [Amps] Muffin Fan on Swan Mark 1 (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Wed, 24 Jul 2002 17:39:00 -0500; Right on, Ian. This is the same principal that makes an airplane fly. The velocity of air passing around the tube envelope must be sufficient to create a low pressure area. This will allow the air s; /archives//html/Amps/2002-07/msg00466.html (9,556 bytes)
67. [Amps] For Sale (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sat, 27 Jul 2002 12:38:53 -0500; Phil, After the sale is completed, please share with the group your opinions, comments, and experiences with this amp. (((73))) Phil, K5PC; /archives//html/Amps/2002-07/msg00505.html (6,713 bytes)
68. [Amps] relative value of a Henry 4K (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Thu, 6 Jun 2002 14:13:44 -0500; A very clean 4-K will bring c. $3000. Call Henry and deduct the price of the parts for the P.S. from the above, if you consider the overall amp to be a nice one. I have refurbished several 4-K's tha; /archives//html/Amps/2002-06/msg00043.html (7,546 bytes)
69. [Amps] Solid state relay question (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sat, 15 Jun 2002 23:51:04 -0500; to when Hi Vic, and fellow amp'ers! It would be interesting to see what the line voltage drop is with the amp keyed, with the S.S. relays bypassed and connected. Somehow, it seems to me, that your i; /archives//html/Amps/2002-06/msg00106.html (8,059 bytes)
70. [Amps] gla1000 (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Mon, 17 Jun 2002 07:22:28 -0500; Check out the plate RF choke to see if it has been partially cooked. A resonance in the 20 meter band would cause this problem. Good luck, Carl! (((73))) Phil, K5PC; /archives//html/Amps/2002-06/msg00122.html (6,818 bytes)
71. [Amps] RE: [Amps] 8877 Max Grid Current (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Tue, 18 Jun 2002 13:40:46 -0500; Since the original question was VHF related, take my observations for what they may be worth. I was charged with testing 33- 8877's, with date codes from late '70's to early "90's. I used an RF gener; /archives//html/Amps/2002-06/msg00145.html (8,634 bytes)
72. [Amps] 400 watts per 4-1000 drive???? (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Thu, 20 Jun 2002 18:20:45 -0500; . You are parsing his broken English wrong, Steve. He means that the "Macth Pair" puts out 3800 watts. (my opinion is not for long with 800 watts drive!) (((73))) Phil, K5PC; /archives//html/Amps/2002-06/msg00162.html (7,114 bytes)
73. [Amps] Need help on xmtr loading circuit. (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Thu, 20 Jun 2002 23:48:21 -0500; According to the W5FD formula, for 4000 volts @ 700 ma, you need 22uh on the Pi coil and 4.8uh on the "L" coil. I would toss the 2nd harmonic filter, as you will be plenty safe with this circuit. C1; /archives//html/Amps/2002-06/msg00170.html (8,745 bytes)
74. [Amps] Pi tanks vs Pi L + LOW PASS (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Thu, 27 Jun 2002 21:58:26 -0500; Hi Norm, and all the gang! The low pass filter would be fine after the Pi, but it would need to cut off just above the band in use. You would need one for each desired band. Much easier just to add; /archives//html/Amps/2002-06/msg00251.html (8,624 bytes)
75. [Amps] Pi tanks vs Pi L + LOW PASS (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Fri, 28 Jun 2002 18:41:54 -0500; I don't think the tube knows whether it is on a metal or wood chassis. The reason I went to metal boxes in the '50's was to keep from wiping out all the new Muntz TV's in the neighborhood. Happy 4th; /archives//html/Amps/2002-06/msg00258.html (8,291 bytes)
76. [Amps] choke resonances (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sat, 29 Jun 2002 12:04:26 -0500; The RF Parts choke (RFC-3) used in many Ameritron and other brand amps is the one I have been using, Carl. It has plenty of L for 160 meter coverage. The first resonance is parked around 11.5-12 mhz,; /archives//html/Amps/2002-06/msg00270.html (8,270 bytes)
77. [Amps] choke resonances (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sat, 29 Jun 2002 15:11:36 -0500; Amen, Jim! As I have mentioned before, the folks @ RF Parts are most helpful and informative. It is so refreshing in this day and "cyber-age" to get real people on the other end of the line that are; /archives//html/Amps/2002-06/msg00274.html (8,231 bytes)
78. [Amps] choke resonances (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sun, 30 Jun 2002 14:01:43 -0500; It would be clear to all if the manufacturer of this fine choke had put their label on it! Had it been me, I would have done so, and advertised to the world how good it is! Please inform us, Tom, if; /archives//html/Amps/2002-06/msg00285.html (7,878 bytes)
79. [Amps] HARRIS RF110 (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Thu, 9 May 2002 12:15:03 -0500; Hi Gang!!! I want amke a modification on my harris RF110a to use it with full power ( 2 x 4cx1500). Any guy have experience with it???? Many Thanks, 73s I do not push my RF-110's past 1500 watts due; /archives//html/Amps/2002-05/msg00108.html (7,528 bytes)
80. [Amps] Re: Alpha 374 Transformer Needed (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Thu, 9 May 2002 16:47:52 -0500; I need some help with the restoration of a beautiful Alpha 374. It's complete except for the transformer and I was shocked that both Alpha and Peter Dahl had no source for this part. Someone out ther; /archives//html/Amps/2002-05/msg00110.html (7,320 bytes)

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