Search String: Display: Description: Sort:

Results:

References: [ +from:philc@texascellnet.com: 241 ]

Total 241 documents matching your query.

121. Re: [Amps] Parasitics & Filament Sag (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Sun, 27 Aug 2006 10:55:55 -0500
It is sad that in most cases of "fixes" reported here on the reflector, when a parasitic suppressor is replaced, no one measures the value of the old resistor compared to what its original value was.
/archives//html/Amps/2006-08/msg00699.html (11,284 bytes)

122. Re: [Amps] Need Japan Radio Plate Transformer Info (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Fri, 1 Sep 2006 08:32:25 -0500
It could even be bordering on supercalifragilisticexpealidoches! (((73))) Phil, K5PC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com
/archives//html/Amps/2006-09/msg00016.html (7,516 bytes)

123. Re: [Amps] Parasitics & Filament Sag (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Mon, 4 Sep 2006 12:34:52 -0500
You don't even need a dipmeter. Most class B amps with a Pi network tank circuit do not produce maximum power output at the tune/load setting where a dip in the anode current occurs. In fact, I have
/archives//html/Amps/2006-09/msg00075.html (10,154 bytes)

124. Re: [Amps] Henry 3K-A Step Start Resitor Cone (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Wed, 6 Sep 2006 10:21:22 -0500
Amen, Steve. They make a really robust glitch resistor, as well as a step-start resistor. Henry used these when they opted to let the operator be the "step-start timer" by making it a position on th
/archives//html/Amps/2006-09/msg00125.html (8,314 bytes)

125. Re: [Amps] Step Start on a 3KA Amp (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Tue, 19 Sep 2006 12:50:21 -0500
The reason for the cone heater instead of a 25-50 watt resistor is that this is a "manual" step-start circuit on the Henrys. It only has three parts; a cone heater, a switch, and the operator's hand
/archives//html/Amps/2006-09/msg00222.html (9,180 bytes)

126. Re: [Amps] Step Start on a 3KA Amp (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Tue, 19 Sep 2006 14:06:36 -0500
Many of the Henry amplifiers were sold to Government and Commercial users. They were in U.S. Embassies all over the world. Henry assumed that the operators would read and adhere to the manuals. If y
/archives//html/Amps/2006-09/msg00224.html (8,782 bytes)

127. Re: [Amps] HV Turn On Delay (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Wed, 27 Sep 2006 00:08:04 -0500
The Alpha 77DX/SX and others bring up the HV when the a.c. mains switch is activated. The timers are on the PTT line. Other manufacturers go to a lot of extra expense and circuitry to withhold the H
/archives//html/Amps/2006-09/msg00317.html (6,939 bytes)

128. Re: [Amps] HV Turn On Delay (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Wed, 27 Sep 2006 13:26:16 -0500
Sure it's possible; take a crash course in Russian and call them up! The consensus on this thread, and also my opinion is that as long as the tube(s) are hard-biased and cannot draw current, no harm
/archives//html/Amps/2006-09/msg00327.html (8,090 bytes)

129. Re: [Amps] New Chinese linear Amplifier (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Fri, 29 Sep 2006 11:54:52 -0500
That is to keep the Christmas Tree style plate choke from bursting into flame the first time the amp is tuned up on the WARC bands! (((73))) Phil, K5PC ______________________________________________
/archives//html/Amps/2006-09/msg00363.html (7,300 bytes)

130. Re: [Amps] FW: Zener Bias Replacement (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Tue, 7 Nov 2006 17:05:37 -0600
Go down to your local emporium and buy a 1N4741 Zener, a 2N3055 transistor, and a heat sink for the 3055. This will give you 12 volts at 50 watts +. If you need another voltage, just sub the 4741 fo
/archives//html/Amps/2006-11/msg00113.html (8,598 bytes)

131. Re: [Amps] Prmetheus (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Thu, 23 Nov 2006 20:43:37 -0600
And according to the info that power specification is INPUT. So the output will be roughly 1500 watts. As Tom says, 1500 watts key down, 1500 watts carrier and 1500 watts PEP and 1500 watts CW. I'm g
/archives//html/Amps/2006-11/msg00257.html (7,293 bytes)

132. Re: [Amps] QST (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Mon, 18 Dec 2006 11:03:48 -0600
Also, note that when the vox relay pulls in, you are now running at zero bias. Not too swift an idea for Z tubes. In addition to the two aforementioned guffaws, I have spotted several more. Maybe we
/archives//html/Amps/2006-12/msg00138.html (8,731 bytes)

133. Re: [Amps] EIMAC application bulletins (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Mon, 18 Dec 2006 13:12:38 -0600
Did some poking around on Google ('EIMAC application bulletins') and did find that the EIMAC web site (www.cpii.com/eimac/eiapps.htm) does have some of the old application notes available in *.pdf fo
/archives//html/Amps/2006-12/msg00148.html (7,275 bytes)

134. Re: [Amps] Pi-L Tank on TenTec Titan 425 (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Thu, 21 Dec 2006 14:41:18 -0600
A "fix" has been shown for many years in the ARRL Handbook, and others. You install a small inductor between the plate block capacitor and the tune capacitor. The problem is that some "bread-slicer"
/archives//html/Amps/2006-12/msg00194.html (9,032 bytes)

135. [Amps] Floating Elevated Radials (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Fri, 29 Dec 2006 12:21:49 -0600
My elevated radials float, and are connected directly to the shield of the feed line. (7/8 inch Heliax.) When the other end of the Heliax is connected to the output of my amp, it is "grounded" to th
/archives//html/Amps/2006-12/msg00220.html (7,260 bytes)

136. Re: [Amps] schematic 160 meter amp using 3cx3000a7 (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Fri, 12 Jan 2007 15:11:48 -0600
Just another 2 cents worth from another old Geezer.... "3X6" "3X3" "4X1" etc. are really a generic term. The first digit is for the number of elements in the tube, and the 2nd digit is for the plate
/archives//html/Amps/2007-01/msg00097.html (8,863 bytes)

137. Re: [Amps] schematic 160 meter amp using 3cx3000a7 (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Fri, 12 Jan 2007 19:13:13 -0600
Some of you guys really need to get out more and experience the real world. If it took the reading of the amps reflector to introduce you to ham jargon, you probably have led a too-sheltered life. I
/archives//html/Amps/2007-01/msg00102.html (10,146 bytes)

138. Re: [Amps] What am I missing? (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Fri, 12 Jan 2007 20:49:41 -0600
Nothing new here; the Alpha 77DX and others, use simple L/C networks about 3 inches from the cathode. That is also 50 j something. The SX kit that adds a second 8877 includes a 2:1 un-un to make the
/archives//html/Amps/2007-01/msg00109.html (7,763 bytes)

139. [Amps] FW: FW: plate choke bypass caps (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Wed, 24 Jan 2007 15:57:42 -0600
Creative Electronics has been using this method for 25+ years on their amps that cover 160 meters. I have bought the caps (.01mfd @ 10kv) and the relays from them for several projects over the years
/archives//html/Amps/2007-01/msg00252.html (7,582 bytes)

140. Re: [Amps] power supply transformer (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Wed, 31 Jan 2007 13:56:12 -0600
I have a Collins 28 volt 100 amp power supply here in great condition. Someone make me an offer I can't refuse.... (((73))) Phil, K5PC _______________________________________________ Amps mailing lis
/archives//html/Amps/2007-01/msg00347.html (10,667 bytes)

Current List: 121 - 140
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13]
This search system is powered by Namazu