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Total 241 documents matching your query.

181. Re: [Amps] Glitch Resistor (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Mon, 2 Feb 2009 15:43:35 -0600
I buy my power resistors from Allied Electronics. (((73))) Phil, K5PC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listin
/archives//html/Amps/2009-02/msg00037.html (8,998 bytes)

182. Re: [Amps] Glitch Resistor (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Mon, 2 Feb 2009 15:54:55 -0600
You guys are confusing glitch protection with fuses. Glitch protection must be robust enough that it remains intact after a fault. (((73))) Phil, K5PC _______________________________________________
/archives//html/Amps/2009-02/msg00038.html (9,217 bytes)

183. Re: [Amps] Glitch Resistor (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Mon, 2 Feb 2009 15:52:21 -0600
There is no "Universal" value glitch resistor. Just like there is no such thing as a generic parasitic suppressor, or plate choke. All of these things must be tailored to the circuit that you are pu
/archives//html/Amps/2009-02/msg00039.html (9,574 bytes)

184. Re: [Amps] High voltage/wattage zeners (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Sun, 8 Feb 2009 14:43:39 -0600
K2AW's Silicone Alley has 50 watt zeners. (((73))) Phil, K5PC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2009-02/msg00208.html (7,927 bytes)

185. Re: [Amps] MGF1502 (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Fri, 13 Feb 2009 11:15:03 -0600
Google mgf1502. You will see all of the distributors of this device, and the quantity that each has in stock. Pick a dealer, and order. (((73))) Phil, K5PC __________________________________________
/archives//html/Amps/2009-02/msg00420.html (8,723 bytes)

186. Re: [Amps] Harris amps (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Thu, 19 Feb 2009 13:01:08 -0600
It has a pair of 4CX1500B's, driven by a pair of 8122's. The tubes are very under-rated and although the amp is rated The 2-2.5 MHz band can be re-tweaked to 1.8-2.0 MHz for max. suds across the 160
/archives//html/Amps/2009-02/msg00571.html (8,835 bytes)

187. Re: [Amps] turns = henries question (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Sat, 21 Feb 2009 15:18:19 -0600
On that form you have, 4.25 inches tightly wound comes out to 90 uh. One half of that length would be 45 uh. You can do the math to get to your needed 60 uh. (((73))) Phil, K5PC ____________________
/archives//html/Amps/2009-02/msg00621.html (8,012 bytes)

188. Re: [Amps] turns = henries question (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Sat, 21 Feb 2009 15:31:49 -0600
All you need worry about for a 6-meter choke is that all resonances are above 54 MHZ. 45 uh is plenty for this. Just remove half of the turns, including the burned part, and you will be fine. 60 uh
/archives//html/Amps/2009-02/msg00623.html (8,255 bytes)

189. Re: [Amps] 47ohm 2W resistor, who still has them? (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Sat, 21 Feb 2009 15:42:40 -0600
Great advice. Carbon comp. would be my last choice for R-Supp. in a parasitic choke. (((73))) Phil, K5PC _______________________________________________ Amps mailing list Amps@contesting.com http://
/archives//html/Amps/2009-02/msg00626.html (8,652 bytes)

190. Re: [Amps] QRO HF-2500DX on 10.1 MHz (Proper title!) (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Sat, 28 Feb 2009 12:53:11 -0600
Amplifiers on 30 meters are completely legal in the USA. It is the power level that is restricted. The power output of a 100-watt transceiver can be doubled with the addition of an amplifier, and yo
/archives//html/Amps/2009-02/msg00729.html (9,450 bytes)

191. Re: [Amps] HV measurements (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Tue, 10 Mar 2009 19:21:22 -0500
I just bought one also; thanks for the "heads-up" on a great deal. Every amp builder/fixer needs something like this on the bench. Newbies trying to find out why their amp is not working need to fur
/archives//html/Amps/2009-03/msg00314.html (8,980 bytes)

192. Re: [Amps] Silver plating (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Wed, 8 Apr 2009 23:18:16 -0500
Bill, I would not waste silver on such an undersized coil. Wind a coil out of 1/4 inch or 3/8 inch copper tubing. This should run cool @ 1500 watts. Then, if you want it to look pretty, go ahead and
/archives//html/Amps/2009-04/msg00095.html (8,833 bytes)

193. Re: [Amps] S W R (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Fri, 24 Apr 2009 20:20:54 -0500
No, you do not understand. With a reflected power of 10 watts, your watt meter will indicate 110 watts forward, of which 10 watts must be subtracted from the reading to obtain the correct value for
/archives//html/Amps/2009-04/msg00327.html (8,366 bytes)

194. Re: [Amps] Fw: High SWR = Baluns actually (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Sat, 25 Apr 2009 19:07:38 -0500
This problem reared its ugly face when 160 meters went QRO, and the WARC bands were added. An 80-40-20-15-10 meter design was very forgiving. You could use military/commercial band switches from WW
/archives//html/Amps/2009-04/msg00356.html (8,839 bytes)

195. Re: [Amps] RL Calculations (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Sun, 26 Apr 2009 19:25:56 -0500
That is the correct academic answer, Bill, but in the real world, if he sets up the tank for 1200-1300 ohms, the difference cannot be measured. (((73))) Phil, K5PC __________________________________
/archives//html/Amps/2009-04/msg00371.html (7,458 bytes)

196. Re: [Amps] RL Calculations (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Sun, 26 Apr 2009 23:35:41 -0500
I am so glad that when I built my 3X3 single-band (160 meter) amp I used a 20 uh tank coil as L1 in a pi-l configuration. This came out to be a Q of 6. For over 15 years, I take a few hours in Octobe
/archives//html/Amps/2009-04/msg00375.html (8,119 bytes)

197. Re: [Amps] Three phase transformer on single phase (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Mon, 4 May 2009 21:14:50 -0500
Dr. Barry, I have converted 20 + Henry Plasma Generators to single-phase with great results. Fortunately, only the HV transformer was 3-phase, so it was fairly easy. When you convert the existing cho
/archives//html/Amps/2009-05/msg00009.html (7,756 bytes)

198. Re: [Amps] DEAD Alpha 91B (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Mon, 18 May 2009 12:56:53 -0500
I have used this method many times with the 77 series amps to drop the heater voltage to a proper level. Alpha assumed 230-volt mains when this series was designed. Most of us now have 240-245 volt
/archives//html/Amps/2009-05/msg00111.html (9,652 bytes)

199. Re: [Amps] PWD 3amp/95uH plate choke/YC-156A on 160 meters (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Wed, 20 May 2009 19:04:28 -0500
95 uh is too little for 160 meters. There is interaction with the tank circuit. The easiest thing to do is to purchase an R.F. Parts or Ameritron choke. It is over 200 uh, and has no resonances in th
/archives//html/Amps/2009-05/msg00142.html (7,707 bytes)

200. Re: [Amps] Centurion (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Wed, 27 May 2009 17:09:59 -0500
I have never heard of any amp damage due to too much air passing through it. As long as the fan/blower does not suck the tubes out of their sockets, more air circulation has to be better. Manufactur
/archives//html/Amps/2009-05/msg00223.html (7,243 bytes)

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