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References: [ +from:royanjoy@ncn.net: 309 ]

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161. [Amps] Re: load capacitor ratings (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Mon, 30 Aug 2004 17:20:11 -0500
Will, no. What you describe applies to a Pi-net, not a Pi-L. BTW, do you have a call sign? 73, Roy K6XK "Simple, Determine the voltage across the 50 ohm load from the power in watts. Then use a load
/archives//html/Amps/2004-08/msg00459.html (7,268 bytes)

162. [Amps] A thought about regulating fil voltage... (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Fri, 29 Oct 2004 15:48:28 -0500
the easy way?? It came to mind that two series strings of hefty, stud-mounted, low voltage diodes could be installed back to back polarity across the filament, effectively acting as a shunt regulator
/archives//html/Amps/2004-10/msg00511.html (6,982 bytes)

163. [Amps] Re: a thot...fil reg... (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Sat, 30 Oct 2004 07:53:47 -0500
Asked, "I take it your talking about an AC shunt regulator using two zener diodes back to back? If so, it would work providing the zeners watt rating was large enough" No, I'm talking about common LV
/archives//html/Amps/2004-10/msg00517.html (6,413 bytes)

164. [Amps] Re: Step-start calculation... (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Fri, 19 Nov 2004 16:37:25 -0600
About... "...What would be a suitable value of step-start R to limit the inrush current to 50A-rms?..." In this practical & real world, it would be 4.6 ohms. 73, Roy K6XK ____________________________
/archives//html/Amps/2004-11/msg00306.html (6,334 bytes)

165. [Amps] Re: Step-start calculation (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Sat, 20 Nov 2004 07:49:56 -0600
I don't like to think about it. I gives me a headache. 73, Roy K6XK "...What would be a suitable value of step-start R to limit the inrush current to 50A-rms?..." In this practical & real world, it w
/archives//html/Amps/2004-11/msg00323.html (6,776 bytes)

166. [Amps] Gigavac relays (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Mon, 22 Nov 2004 11:34:47 -0600
FYI for anyone who may not be aware: www.gigavac.com 73, Roy K6XK _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/am
/archives//html/Amps/2004-11/msg00376.html (6,283 bytes)

167. [Amps] Re: plate resistance (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Fri, 7 Jan 2005 08:18:09 -0600
Was stated: "Even though the Q is a factor plugged into the formula, there are "Q meters" for testing the actual Q of a built component-network. After the tank is complete, or just the tank coil itse
/archives//html/Amps/2005-01/msg00094.html (7,338 bytes)

168. [Amps] Re: CRL 858 doorknob (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Tue, 25 Jan 2005 09:30:49 -0600
Asked: "Hi everyone , I'm looking for maximum voltage a CRL 858 type doorknow capacitor is designed for? Anyone has datas abt this serie?" 73's Dom/F6DRO It's rated 5 KV. 73, Roy K6XK/0 _____________
/archives//html/Amps/2005-01/msg00520.html (6,312 bytes)

169. [Amps] Re: plate chokes (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Sat, 29 Jan 2005 08:41:32 -0600
Asked: "Why are plate chokes seemingly black magic? (etc.)" I'll try to dispel some of the mystery and misconceptions. First, the very principle of operation of 'modern' solenoid, air core plate chok
/archives//html/Amps/2005-01/msg00569.html (8,878 bytes)

170. [Amps] Re: plate chokes (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Sat, 29 Jan 2005 11:23:50 -0600
"On 10 meters at 1 kW, you can get by with using about 22 to 40 uH which is a pretty small choke when it's on a ferrite core. (etc.)" Will, That's nice, but a 10 meter resonant SOLENOID air core chok
/archives//html/Amps/2005-01/msg00576.html (7,344 bytes)

171. [Amps] Re: 0.01 @ 2 kv caps. (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Mon, 7 Feb 2005 13:49:12 -0600
Inquired, "I am looking for some .01 mfd and .02 mfd @ 2kv ceramic radial lead capacitors. Looked in digikey and mouser and didn't see them there. Any suggestions on where to buy them?" Thanks Gary K
/archives//html/Amps/2005-02/msg00243.html (6,645 bytes)

172. [Amps] Re: compact coils... (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Tue, 15 Feb 2005 07:14:44 -0600
Marv talked about: "The 160 meter portion, even employing a reduced diameter conductor, requires almost half the total space in a Pi-Coil. Has anyone ever seen a multilayer approach to this portion o
/archives//html/Amps/2005-02/msg00527.html (7,515 bytes)

173. Re: [Amps] water cooled... (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Sat, 5 Mar 2005 14:51:18 -0600
Peter -- Which is the better coolant, pure ethylene glycol or pure water? I'm not Peter, but water is the better coolant (as far as absorbing more heat--corrosion is another matter). 73, Roy K6XK ___
/archives//html/Amps/2005-03/msg00118.html (6,267 bytes)

174. Re: [Amps] SB-200 blows fuses (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Sat, 19 Mar 2005 10:56:21 -0600
Stated: "Start only the filament department without the HV going. Vice versa, start the HV without the filament going." In the SB-200, both are derived from a single transformer (a poor concept). 73,
/archives//html/Amps/2005-03/msg00417.html (6,891 bytes)

175. Re: [Amps] potential suppressor... (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Mon, 21 Mar 2005 07:38:35 -0600
Hi Tomm, As Richard said, if you work only the lower bands, that resistor will work fine. I have used several similiar resistors, up to 5 ohms, in fact, with 4 or 5 turns on ceramic forms. Of course,
/archives//html/Amps/2005-03/msg00449.html (7,950 bytes)

176. Re: [Amps] mica condensers (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Thu, 14 Apr 2005 11:59:15 -0500
Was asked, "Hello, I have two capacitors, NOS both, manufactured by Soshin Denki K.K., one is Type A-2, 0.01uF, T.V. 5 KV DC, and a stamped number (date code?) 61-8. The other is Type A-1, 0.01uF, T.
/archives//html/Amps/2005-04/msg00280.html (7,533 bytes)

177. Re: [Amps] New Command Technologies Amp (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Fri, 29 Apr 2005 16:10:01 -0500
About: "The CPX tubes are run right up to their flashover point, of 7KV, if you figure RF peak volts at 2X DC anode voltage of 3.5 KV." That's not how it figures except for high-level a.m. plate modu
/archives//html/Amps/2005-04/msg00622.html (6,953 bytes)

178. Re: [Amps] New Command Technologies Amp (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Sat, 30 Apr 2005 10:28:52 -0500
Thanks for rapping my head. I was thinking of a non-resonant load at the time--as in a really QRP linear driver stage. Roy K6XK 'In SSB and CW modes, the peak voltage on the plate is the power supply
/archives//html/Amps/2005-04/msg00633.html (7,474 bytes)

179. Re: [Amps] ARF1505 (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Mon, 23 May 2005 07:52:27 -0500
About, " By operating the device at 30-50% of the maximum voltage, this problem is solved... at least the gate shift can...(etc.)" By utilizing your outdoor pole pig as a 'remote' power supply transf
/archives//html/Amps/2005-05/msg00265.html (7,802 bytes)

180. Re: [Amps] SB-220 knobs... (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Mon, 30 May 2005 10:30:45 -0500
Looking for two of the SB-220 tune / load knobs. I think they are the same on the SB-200 as well. Thanks... Rich N7TR Rich, I have one, like new. I'm keeping it for general use. Do you have a compara
/archives//html/Amps/2005-05/msg00320.html (6,330 bytes)

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