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Total 769 documents matching your query.

301. Re: [Amps] Ten-Tec Centurion (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Thu, 11 Nov 2004 07:47:53 -0800
"Tom also said that the RF-resistance of Ni-Cr alloy decreases as frequency increases. In addition, Tom said that the Laws of AC Circuit Analysis do not apply to VHF L/R suppressors. Does this make s
/archives//html/Amps/2004-11/msg00154.html (10,584 bytes)

302. Re: [Amps] parasitic LC>load? (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Fri, 12 Nov 2004 08:18:57 -0800 (GMT-08:00)
Rich asked: "How does one optimize the placement, diameter and orientation of a lossy hoop?" Rich, apparently you did not work for the right company to learn this. Lossy hoops must be big enough to j
/archives//html/Amps/2004-11/msg00174.html (7,837 bytes)

303. Re: [Amps] Another GassyTube Question (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Fri, 19 Nov 2004 18:38:00 -0800
My first commercial rig was an ARC-5. I had no plate meters and depended upon the blue in the 1625 tubes to tune to resonance. Last thing I wanted was a tube that was not blue. 73, Colin K7FM -- Outg
/archives//html/Amps/2004-11/msg00311.html (7,500 bytes)

304. Re: [Amps] GDO FS (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Mon, 22 Nov 2004 10:15:18 -0800 (GMT-08:00)
I have a number of GDO. The model 59 is my favorite. It is outstanding and works very well into the vhf and uhf region. If you do not own one, grab it up. Colin K7FM Gentlemen: I wish to sell my Meas
/archives//html/Amps/2004-11/msg00378.html (7,669 bytes)

305. Re: [Amps] Advice on instruments for ham use (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Thu, 25 Nov 2004 07:15:17 -0800
Even the old tubed Tek 530-540 series are quite useful, although big and bulky. They are now available for the labor of carrying them away. They are easy to work on, although frequency limited. Altho
/archives//html/Amps/2004-11/msg00426.html (9,943 bytes)

306. Re: [Amps] Current draw at 110 volts for SB-200 and SB-1000 (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Fri, 3 Dec 2004 20:53:00 -0800
I had a home built 3 x 813 amplifier for many years. The plate transformer was only 120 volts. It put out about 750 watts and was instant on. I worked stations I would have missed with my newer Alpha
/archives//html/Amps/2004-12/msg00060.html (9,312 bytes)

307. Re: [Amps] HT 57 blocking cap ratings? (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Sat, 4 Dec 2004 05:44:21 -0800
Wishing to complicate the discussions of the current capacity of transmitting capacitors vs. frequency, I am looking at the Cornell Dubilier advertisement for Type 86 Transmitting Capacitors. This ad
/archives//html/Amps/2004-12/msg00069.html (8,323 bytes)

308. Re: RE : [Amps] .82 ohm (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Tue, 7 Dec 2004 09:17:22 -0800 (GMT-08:00)
"if a g-g amplifier is tuned for max P-out, grid dissipation will always be reasonable" It seems that statement includes the reasons why a grid meter is desired. Let us explore one example. The anten
/archives//html/Amps/2004-12/msg00122.html (11,987 bytes)

309. Re: RE : [Amps] .82 ohm (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Tue, 7 Dec 2004 12:28:59 -0800 (GMT-08:00)
"I would like to get a .82 ohm resister put back in but may test the amp with a jumper. They are mighty scarce around here as are other values. The only thing we have in this area are Radioshacks" If
/archives//html/Amps/2004-12/msg00126.html (6,914 bytes)

310. Re: [Amps] TL-922 and overdriving (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Thu, 9 Dec 2004 06:09:47 -0800
"Hello, I recently changed my TRX for a TS-950SDX which has 150 W power output. I'd like to know if it is dangerous to drive a TL-922 with 150 W, instead of the recommended 100 W ? I ask that because
/archives//html/Amps/2004-12/msg00150.html (7,830 bytes)

311. Re: [Amps] Ref: 4- 6AG7 Linear (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Sat, 25 Dec 2004 09:27:53 -0800
I ran 4 x 6AG7s in an amplifier that I still have. It still has the original tubes although I did not blow air over them or bathe them in oil. I ran over 1000 volts on them, although it could have be
/archives//html/Amps/2004-12/msg00315.html (7,768 bytes)

312. Re: [Amps] OFF TOPIC: Loop antenna question (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Sun, 26 Dec 2004 10:45:19 -0800
It only hertz when I laugh. K7FM -- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.783 / Virus Database: 529 - Release Date: 10/25/04 _
/archives//html/Amps/2004-12/msg00340.html (8,217 bytes)

313. Re: [Amps] SB-220 (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Mon, 27 Dec 2004 08:32:52 -0800 (GMT-08:00)
Hopefully it is in the standby position rather than on. K7FM _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2004-12/msg00361.html (7,936 bytes)

314. Re: [Amps] Parasites, Microbes and Other Hazards (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Sun, 2 Jan 2005 06:51:17 -0800
So parasitic oscillations are really microbes after they have been partying? Happy New Year, Colin K7FM -- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.
/archives//html/Amps/2005-01/msg00010.html (7,292 bytes)

315. Re: [Amps] Small Amplifier (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Fri, 14 Jan 2005 20:18:18 -0800
I looked up both tubes in Eimac's Care and feeding of Power Grid Tubes. I was looking for the imd, as the 250 is a tad bit light. However, the 300 has exactly the same specifications, so there must b
/archives//html/Amps/2005-01/msg00269.html (7,718 bytes)

316. Re: [Amps] Tetrodes in GG Configuration (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Wed, 19 Jan 2005 17:23:31 -0800
"What I can,t figure is why one would want to run a tetrode in G-G where a triode is the very ticket for it? To me, if one wanted to run a tetrode, they would want to run it the way it was designed t
/archives//html/Amps/2005-01/msg00383.html (8,764 bytes)

317. Re: [Amps] Tetrodes in GG Configuration (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Fri, 21 Jan 2005 09:54:08 -0800 (GMT-08:00)
"As long as the bias and screen voltages are clean, the IMD will be low as it should be." This statement is not correct. Look at the Eimac imd curves for a 4CX250 or a 4CX1000A. The charts are made w
/archives//html/Amps/2005-01/msg00417.html (10,153 bytes)

318. Re: [Amps] 10 DB increase (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Sat, 5 Feb 2005 06:51:40 -0800
My opinion on S meter readings is that the manufacturers may intentionally distort the readings to sell product. They are conscious that often the buyer will compare two radios and the one with the h
/archives//html/Amps/2005-02/msg00145.html (9,100 bytes)

319. Re: [Amps] 10dB and propagation (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Sun, 6 Feb 2005 07:05:30 -0800
I used to wonder how come I could use a tri-band beam, advertised at 8 db gain, and an amplifier advertised at 1500 watts and yet be 15 db down from other local stations who were using 3 element mono
/archives//html/Amps/2005-02/msg00191.html (7,047 bytes)

320. Re: [Amps] 10dB and propagation (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Sun, 6 Feb 2005 19:16:32 -0800
"I don't believe there is ANY transmitter on earth (amateur or pro) that could influence the ionosphere by causing a non-linear behavior in that." Looking at the situation in reverse, if an amateur t
/archives//html/Amps/2005-02/msg00213.html (9,108 bytes)

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