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81. [AMPS] HF Power Divider/Combiner (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Fri, 8 Jun 2001 10:37:49 -0700; Can anyone recommend a good design for a broadband (2 to 30 MHz) 50 ohm power divider/combiner capable of handling 3 to 4 KW peak (1.5 KW continuous)? Would any of the power combiners shown in the Mo; /archives//html/Amps/2001-06/msg00075.html (7,252 bytes)
82. [AMPS] Review of Antenna Tuner from Dayton (score: 1): Author: Mike" <W4EF@dellroy.com (Mike); Date: Wed, 20 Jun 2001 16:41:47 -0700; I had a similar experience to Jon's with trying to tune an 80 meter delta on 75 meters using an MFJ989C. The tuner arced very badly at even moderate power levels, so I pulled the top cover off to see; /archives//html/Amps/2001-06/msg00206.html (14,952 bytes)
83. [AMPS] Review of Antenna Tuner from Dayton (score: 1): Author: Mike" <W4EF@dellroy.com (Mike); Date: Wed, 20 Jun 2001 20:07:51 -0700; In a series circuit, lower C, and larger L implies higher Q. The capacitors in a T network are in series, and thus see a voltage drop that is equal to something like Vin/Rin*Xcin = Vin * Xcin/Rin = V; /archives//html/Amps/2001-06/msg00209.html (11,486 bytes)
84. [AMPS] RMS Power (score: 1): Author: Mike" <W4EF@dellroy.com (Mike); Date: Thu, 28 Jun 2001 07:34:54 -0700; Hi Billy, For a continuous wave RF signal across a resistive load, the average power delivered to the load will be equal to the 1/4 * Epk-pk^2 / R. Not sure what you mean by a symetrically modulated.; /archives//html/Amps/2001-06/msg00307.html (11,817 bytes)
85. [AMPS] RMS Power (score: 1): Author: Mike" <W4EF@dellroy.com (Mike); Date: Thu, 28 Jun 2001 07:44:38 -0700; This is a multi-part message in MIME format. --=_NextPart_000_00E2_01C0FFA6.2EFA8D40 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Bill, Isn't the RMS; /archives//html/Amps/2001-06/msg00308.html (17,965 bytes)
86. [AMPS] RMS Power (score: 1): Author: Mike" <W4EF@dellroy.com (Mike); Date: Thu, 28 Jun 2001 08:28:34 -0700; Hi Marv, The average voltage of a sine wave is 0. That is why the RMS value is used in power calculations. For a sine wave the RMS voltage is 0.707 times the peak voltage. 73 de Mike, W4EF......... -; /archives//html/Amps/2001-06/msg00310.html (10,889 bytes)
87. [AMPS] RMS Power (score: 1): Author: Mike" <W4EF@dellroy.com (Mike); Date: Thu, 28 Jun 2001 17:20:27 -0700; Well, okay if your talking about the average "magnitude" of the voltage, then you are correct, Vavg = 2/pi *Epk = 0.636*Epk = 0.9*Erms. Now I understand what Marv was getting at. 73 de Mike, W4EF....; /archives//html/Amps/2001-06/msg00319.html (12,932 bytes)
88. [AMPS] RMS POWER (score: 1): Author: Mike" <W4EF@dellroy.com (Mike); Date: Fri, 29 Jun 2001 16:22:49 -0700; Billy, If you are doing a complete calculation of RMS, you start at E sub zero and end at E infinity-1. The closed form solution is an integral where each interval in the summation is infinitessimall; /archives//html/Amps/2001-06/msg00336.html (16,406 bytes)
89. [AMPS] List owner? (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Sat, 5 May 2001 08:31:10 -0700; Bill, Will, K6NDV made a posting to the SCCC reflector recently using the following address will@madlabs.com Mike, W4EF............. -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amp; /archives//html/Amps/2001-05/msg00059.html (7,733 bytes)
90. [AMPS] 2 x 8877 on 6 meters? (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Thu, 10 May 2001 15:36:54 -0700; A friend of mine is working on a 2 x 8877 amplifier that he has setup to work on 20, 15, 10, and 6 meters. So far its working great on 20 thru 10, but he seems to be falling the victim of stray C at; /archives//html/Amps/2001-05/msg00169.html (7,822 bytes)
91. [AMPS] Conjugate Matching In Class B and C Amplifiers (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Thu, 17 May 2001 11:33:32 -0700; Billy/John, I am not sure it even makes sense to talk about conjugate matching and unconditional stability. Unconditional stability implies that an amplifier is stable for all combinations of positiv; /archives//html/Amps/2001-05/msg00338.html (13,136 bytes)
92. [AMPS] This guy is gotta be kidding! (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Wed, 23 May 2001 21:31:36 -0700; Chuck, Also notice the cooling. The L4B uses a squirrel cage blower to pressurize the chassis and force air up thru the tube sockets to a set of glass chimneys. The L-7 uses a muffin blowing air hori; /archives//html/Amps/2001-05/msg00398.html (9,182 bytes)
93. [AMPS] Sucking instead of Blowing (was - This guy is gotta be kidding!) (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Fri, 25 May 2001 22:07:38 -0700; Hi Chris, You are quite correct. I took a closer look at my L-7 last night, and indeed the fan is sucking air out rather than blowing it in. When I first looked at it, I guess I just assumed the air; /archives//html/Amps/2001-05/msg00439.html (10,021 bytes)
94. [AMPS] Conjugate Matching and Efficiency (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Sat, 26 May 2001 06:38:46 -0700; In the steady state, the transmission line will be nothing more than an impedance transformer. Depending on the load impedance and the Zo of the line, and the length of the line, it will transform th; /archives//html/Amps/2001-05/msg00449.html (12,282 bytes)
95. [AMPS] care to take a guess..? Alpha problem (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Tue, 29 May 2001 20:15:48 -0700; Sounds almost as if the plate blocking capacitor is bad such that the tank is only loosely coupling to the tube (that could explain the weak dip, and the low output power). Does he have an impedance; /archives//html/Amps/2001-05/msg00505.html (11,318 bytes)
96. [AMPS] care to take a guess..? Alpha problem (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Wed, 30 May 2001 07:40:41 -0700; Yes, but that would totally destroy my half-baked theory! Mike, W4EF.............. -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQ; /archives//html/Amps/2001-05/msg00521.html (13,315 bytes)
97. [AMPS] Problem with Ameritron AL-82 (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Fri, 6 Apr 2001 10:13:35 -0700; Hi Gents: I finally got around to messing with this leading character truncation problem a little. Wednesday, I swapped out the problematic FT-1000D with another FT-1000D. This appeared to cure the p; /archives//html/Amps/2001-04/msg00131.html (12,178 bytes)
98. [AMPS] Problem with Ameritron AL-82 (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Fri, 6 Apr 2001 13:08:19 -0700; I'll have to check the other bands, Tom. I made my measurements on 15 meters. Don't know about the relay. I'll have to look next time I am over at the station. 73 de Mike, W4EF......... -- FAQ on WWW; /archives//html/Amps/2001-04/msg00136.html (7,992 bytes)
99. [AMPS] 230 /115 volts (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Sat, 7 Apr 2001 19:22:29 -0700; Barry, The standard service main in a U.S. home is 240 volts AC delivered from a center tapped transformer. The 240 Volts available across the hot leads of the transformer is used to operate high pow; /archives//html/Amps/2001-04/msg00164.html (9,278 bytes)
100. [AMPS] Manual for Heathkit SB-614 Monitor Scope (score: 1): Author: Michael Tope" <W4EF@dellroy.com (Michael Tope); Date: Sat, 7 Apr 2001 20:05:22 -0700; Does anyone know where I can get a manual for a Heathkit SB-614 monitor scope? A photocopy would suffice. Mike, W4EF............. -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@c; /archives//html/Amps/2001-04/msg00166.html (6,926 bytes)

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