Search String: Display: Description: Sort:

Results:

References: [ +from:w9ac@arrl.net: 640 ]

Total 640 documents matching your query.

81. Re: [Amps] 220V wiring: Was Question about safety ground connection (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 17 Nov 2005 11:07:04 -0500
Good point, Bill. That's the potential danger of sharing one neutral conductor between two separate phases. Hey, perhaps an addendum to the NEC is in order to limit the use of all 120VAC current dev
/archives//html/Amps/2005-11/msg00270.html (10,600 bytes)

82. Re: [Amps] 220V wiring: Was Question about safety ground connection (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 17 Nov 2005 13:12:35 -0500
OT, but I could not resist -- The effectiveness of JCAHO is little. What most people do not realize is that the majority of the U.S. medical facilities are safe for the patient one month out of the
/archives//html/Amps/2005-11/msg00278.html (10,982 bytes)

83. Re: [Amps] Voltage at feed point (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sat, 26 Nov 2005 12:48:51 -0500
The resulting Z is 428-ohm. At 1500 watts, I calculate 800 volts at the base. I first solved for Z by taking the overall square root of the R-square + X-square value. I then solved for E through P =
/archives//html/Amps/2005-11/msg00490.html (7,391 bytes)

84. Re: [Amps] Voltage at feed point (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sat, 26 Nov 2005 12:51:45 -0500
Actually, I meant P = E-square / Z which results in 800 volts at the base. Paul, W9AC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.co
/archives//html/Amps/2005-11/msg00491.html (6,614 bytes)

85. Re: [Amps] Telephone Interference Suppressors (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Tue, 24 Jan 2006 20:44:53 -0500
Probably K-Com Filters. http://www.k-comfilters.com/ Paul, W9AC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amp
/archives//html/Amps/2006-01/msg00565.html (7,530 bytes)

86. Re: [Amps] RFI - Small Home Network? (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sun, 5 Feb 2006 16:10:50 -0500
I was never a believer in Wi-Fi for the home, but I am now... cables act as antennas... I couldn't afford the filters or the space to bring that many ferrites and cable loops to my 8-port switch. I
/archives//html/Amps/2006-02/msg00116.html (8,506 bytes)

87. Re: [Amps] Tokyo Hy-Power (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 16 Feb 2006 19:58:30 -0500
John, You're unlikely to find a distributor within the U.S. I don't believe that most (perhaps all) of Tokyo Hy-Power's HF product line complies with the terms of FCC Type-Acceptance. Some of their H
/archives//html/Amps/2006-02/msg00297.html (7,894 bytes)

88. Re: [Amps] The FCC & 1&Oslash;M Amps (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sat, 18 Feb 2006 00:07:21 -0500
The relevant section to the FCC's NPRM WT 04-140... "Limitations imposed on manufacturers. Our Rules prohibit commercial manufactures from marketing power amplifiers that are capable of transmitting
/archives//html/Amps/2006-02/msg00328.html (10,163 bytes)

89. Re: [Amps] Alpha 99 operation (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Tue, 21 Feb 2006 07:10:46 -0500
There are several amp wiring choices, but you haven't described which choice you're using. Are you attempting to use the MP's internal amp relay? Or, are you trying to bypass it for silent QSK switc
/archives//html/Amps/2006-02/msg00375.html (6,995 bytes)

90. Re: [Amps] 87A vs. IC-PW1 (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 22 Feb 2006 13:33:01 -0500
So does the Alpha 87A when one considers that the Pi-L network essentially performs a similar tuning function on the 3:1 VSWR circle in that the load Z is matched reasonably well to the tube output
/archives//html/Amps/2006-02/msg00383.html (7,963 bytes)

91. Re: [Amps] QSK or not (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 23 Feb 2006 07:11:41 -0500
That's a significant factor on the low bands. On 160M-40M, I generally run the RF gain back to about S8 or S9 and this makes QSK much more enjoyable for me. Paul, W9AC ______________________________
/archives//html/Amps/2006-02/msg00428.html (8,119 bytes)

92. Re: [Amps] Pin Diodes (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 8 Mar 2006 06:45:32 -0500
The vacuum relay in my Alpha 70V has lasted 36 years. A vacuum relay with an appropriate accelerator circuit can switch nearly as fast as a PIN diode. Paul, W9AC ____________________________________
/archives//html/Amps/2006-03/msg00187.html (7,027 bytes)

93. Re: [Amps] Pin Diodes (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 8 Mar 2006 08:00:28 -0500
http://www.somis.org/D-a-07B.jpg Paul, W9AC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2006-03/msg00189.html (7,667 bytes)

94. Re: [Amps] Pin Diodes (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 8 Mar 2006 08:38:49 -0500
John, I agree with your statement. I don't mean that all other factors being equal, a vacuum relay can approach the microsecond switching speeds of the PIN diode. But as a practical matter as used i
/archives//html/Amps/2006-03/msg00194.html (9,411 bytes)

95. Re: [Amps] Pin Diodes (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 9 Mar 2006 19:08:01 -0500
The 1N4007 has mediocre isolation characteristics at H.F. when functioning as a PIN switch. Ten Tec used several 1N4007 diodes in its Omni Six T/R circuit, but the result was that main-to-aux antenn
/archives//html/Amps/2006-03/msg00235.html (9,206 bytes)

96. Re: [Amps] Wattmeters (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Tue, 23 May 2006 17:45:40 -0400
I own a lot of wattmeters and notwithstanding the Bird 43, the RadioCraft 3000Pro would be a good choice for an analog wattmeter. I've been using one here along side the Bird 43, PowerMaster and Alp
/archives//html/Amps/2006-05/msg00299.html (7,927 bytes)

97. Re: [Amps] vapor cooled reply TSPA (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Mon, 29 May 2006 00:19:45 -0400
I own an original Alpha 70V and it's been one of the more maintenance-friendly amps I've ever owned. While it is true that one must start with purified or distilled water, the ph and oxygenation iss
/archives//html/Amps/2006-05/msg00467.html (8,882 bytes)

98. Re: [Amps] R. MEASURES PRAYERS ANSWERED (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 31 May 2006 13:54:15 -0400
K7FM: Fuses. Circuit breakers. Lightning arrestors: Discharge gaps. VSWR alarm circuits. Crowbar over-voltage protection. What do all these devices have in common with the parasitic suppressor? Why,
/archives//html/Amps/2006-05/msg00567.html (9,323 bytes)

99. Re: [Amps] AL 1200 (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Mon, 26 Jun 2006 08:14:05 -0400
Ray, As I recall the AL-1200's 3CX1200A7 uses a directly-heated cathode. If so, you may want to run the filament for 30-minutes without any RF excitation at the time of first activation. I am not su
/archives//html/Amps/2006-06/msg00426.html (8,097 bytes)

100. Re: [Amps] Maximum RF output in practical application: 4-250A (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Mon, 3 Jul 2006 15:21:30 -0400
I was hoping that this discussion wasn't going to morph into one about regulatory bandwidth but... With all due respect Joe, even Hollingsworth concedes the ambiguity of 97.307(a). I believe he has
/archives//html/Amps/2006-07/msg00125.html (14,644 bytes)

Current List: 81 - 100
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]
This search system is powered by Namazu