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101. [AMPS] HV SAG (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Sun, 13 Apr 1997 09:47:11 -0500; Your problem is most likely on the primary side of the circuit. At the load you are drawing, you need a minimum of #4 wire between your breaker panel and the radio, with no other devices sharing the; /archives//html/Amps/1997-04/msg00172.html (7,051 bytes)
102. [AMPS] 8877 Filament Adjustments (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Mon, 14 Apr 1997 19:45:16 -0500; I put my resistors in the primary..this serves as a soft-start also, limiting the initial surge current on the filament of the 8877. I had to use a resistor in the secondary of my Alpha 77SS because; /archives//html/Amps/1997-04/msg00186.html (7,128 bytes)
103. [AMPS] Collins 30S1 Improvements (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Mon, 14 Apr 1997 22:18:39 -0500; This is not my mod...it was published years ago by my friend John Adel, W5RR. Readjusting the bias and tuning meter calibration after raising screen voltage to 300v: Turn the bias adjust control full; /archives//html/Amps/1997-04/msg00190.html (8,275 bytes)
104. [AMPS] Re: 8877 Filament Adjustments (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Tue, 15 Apr 1997 10:15:47 -0500; limiting If you have 6 volts measured at the tube pins, you obviously need a resistor in the circuit. Primary or secondary; builder's choice. It is not put there for the primary purpose of inrush cur; /archives//html/Amps/1997-04/msg00193.html (7,523 bytes)
105. [AMPS] Shipping Amps (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Tue, 15 Apr 1997 23:23:46 -0500; I can certainly feel your pain, Bill! At least FedEx has paid off very well and very promptly for the damages, and reimbursed me for the freight charges. The last two Alpha 77SX's I shipped (they don; /archives//html/Amps/1997-04/msg00207.html (8,304 bytes)
106. [AMPS] 8877 Step-Start/Warmup (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Thu, 17 Apr 1997 14:07:48 -0500; Let us put this thread into perspective by looking at a typical circuit. The step-start relays in my amp close 800 ms after applying power. It is there primarily to allow the filter capacitor in the; /archives//html/Amps/1997-04/msg00228.html (7,186 bytes)
107. [AMPS] 8877 Step-Start/Warmup (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Thu, 17 Apr 1997 19:19:10 -0500; I have no control in this case over "good practice" This is only the tip of the iceberg! This amp is full of "bad practice". It is an Alpha 77SX. My friend Vince and I have been working with these am; /archives//html/Amps/1997-04/msg00231.html (8,037 bytes)
108. [AMPS] 4CX15000 Amp.???? (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Fri, 18 Apr 1997 13:39:44 -0500; dissipation >rating not to exceed 1500 watts. What about the RTTY and other digital mode users? Aren't they entitled to 1500 watts output also? I would think that a tube with a 3000 watt dissipation; /archives//html/Amps/1997-04/msg00245.html (9,203 bytes)
109. [AMPS] 4CX15000 Amp.???? (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Fri, 18 Apr 1997 15:15:05 -0500; To: <amps@contesting.com> It also says to RTTY contesters to "run 750 watts." Oops!(playing field tilt) No, we certainly do not need tubes with handles, that is a little "over-kill!" I think an effec; /archives//html/Amps/1997-04/msg00250.html (9,215 bytes)
110. [AMPS] 1500 w dissipation limit (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Fri, 18 Apr 1997 20:07:39 -0500; AMEN, Terry! Over my life time here in Texas, the speed limit on our highways has gone from 60 mph to 55 mph and now 70 mph. All these years my cruise control has been set at 80 mph. In a free societ; /archives//html/Amps/1997-04/msg00262.html (8,023 bytes)
111. [AMPS] Re:What are "handles" on tubes? (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Mon, 21 Apr 1997 17:52:03 -0500; Large external anode ceramic tubes, generally 5 KW plate dissipation and up, have built-in handles to facilitate insertion/removal from their sockets. Some large tubes, for example the 3CX15000B7 wh; /archives//html/Amps/1997-04/msg00313.html (7,719 bytes)
112. [AMPS] Single band amp construction query (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Tue, 22 Apr 1997 13:12:03 -0500; Hi, Chad! Been there, done that. You cannot switch D.C. with a vacuum relay with any voltage present on the contacts. Also you must also put a relay in the B- returns or all your meters will read wro; /archives//html/Amps/1997-04/msg00324.html (9,537 bytes)
113. [AMPS] Need Specs. on Jennings RF-3A-26S Relays (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Tue, 22 Apr 1997 13:19:13 -0500; Anyone have a Jennings book handy? I need the current rating, # of poles, (I assume spdt) and switching speed of the Jenninngs RF-3A-26S Vacuum Relay. Many thanks in advance for help! (((73))) Phil,; /archives//html/Amps/1997-04/msg00326.html (6,889 bytes)
114. [AMPS] The 3CX3000 - Why not? (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Tue, 22 Apr 1997 16:25:54 -0500; That is what Henry USED to put in their 8K-Ultra. They have pulled it off the market due to chronic RF tank circuit problems. What you have to remember on using these big tubes is that the blower req; /archives//html/Amps/1997-04/msg00335.html (7,397 bytes)
115. [AMPS] Common PS/Multi Amps (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Tue, 22 Apr 1997 21:41:15 -0500; You and KL7RA are very fortunate! Most of us don't have a 4 kv@ 6 amp power supply lying around the shack, nor do we have electrical drops big enough to handle that. It still amazes me that if 6 amps; /archives//html/Amps/1997-04/msg00340.html (7,344 bytes)
116. [AMPS] Type-accept ? (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Wed, 23 Apr 1997 02:29:27 -0500; The law has succeeded in reducing the currently available commercial amps. to underpowered, over-worked, underengineered toys. use it 30 amps is nothing! Don't you have a clothes dryer, or electric r; /archives//html/Amps/1997-04/msg00344.html (8,089 bytes)
117. [AMPS] Type-accept ? (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Wed, 23 Apr 1997 17:05:04 -0500; How about Metron, Henry, (SS-750), Icom (IC-2KL, IC4-KL) Ten-Tec, Ameritron, Yaesu, and even Allen Bond's kits? All these, many of which I own/have owned easily meet all the type acceptance requireme; /archives//html/Amps/1997-04/msg00355.html (7,839 bytes)
118. [AMPS] : WHY ARE THE TURNS SHORTED? (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Thu, 24 Apr 1997 10:22:18 -0500; It depends upon whether you are using a Pi or Pi-L network, and the number of bands involved. In the early days, simple five band (10-80m) Pi networks just let the unused turns float. (i.e. the B&W 8; /archives//html/Amps/1997-04/msg00375.html (8,131 bytes)
119. [AMPS] solid-state power relays (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Fri, 25 Apr 1997 15:51:07 -0500; Hi, Jim! Been there, done that, got the T-shirt! I love the SS relays for turning on and off things. but they are far too fast for a step-start circuit if used alone. You still need the 25 ohm resist; /archives//html/Amps/1997-04/msg00400.html (7,756 bytes)
120. [AMPS] Band Switch Heath SB-1000 (score: 1): Author: philk5pc@connect.net (Phil Clements); Date: Sat, 26 Apr 1997 18:38:25 -0500; As I stated in another thread, this problem is exacerbated when a Pi-L tank is in use. I would bet the farm that the majority of switch failures in the SB-1000 occurred when the amp was operating on; /archives//html/Amps/1997-04/msg00421.html (10,200 bytes)

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