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1. [Amps] RE: Parasitics (score: 1): Author: jjones at etex.net (Jimmy Jones); Date: Mon Mar 10 03:34:36 2003; I'm of the opinion that Rich is probably one of the smarter guys in this group.(there are a lot of smart guys here) Just face the facts...What he is teaching you about parasitics is correct. I know t; /archives//html/Amps/2003-03/msg00415.html (31,934 bytes)
2. [Amps] RE: Parasitics (score: 1): Author: 2 at vc.net (rlm); Date: Mon Mar 10 07:07:58 2003; It's not that anyone is smart, it's just that nobody apparently thought about Why a R/L parastic suppressor reduces VHF gain and makes HF amplifiers less likely to do the squirrel thing. - I didn't r; /archives//html/Amps/2003-03/msg00417.html (7,431 bytes)
3. [AMPS] Re: Parasitics (score: 1): Author: k1xt@hotmail.com (bill thomas); Date: Thu, 19 Jul 2001 13:44:41 -0500; I once had a Henry 2K-3 in which I installed Mr. Measures' suppressor kit. I thought I was doing a good thing. The first time I put it on 15 meters several of the resistors exploded much as a shotgun; /archives//html/Amps/2001-07/msg00224.html (7,616 bytes)
4. [AMPS] Re: Parasitics (score: 1): Author: 2@vc.net (2); Date: Thu, 19 Jul 2001 18:50:19 -0700; /\ Bill -- If this is the case. we owe you a refund cheque. However, I looked through our records archive and there is no record of a parasitic suppressor retrofit kit sale to a Bill Thomas. Did you; /archives//html/Amps/2001-07/msg00228.html (7,882 bytes)
5. [AMPS] Re: Parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Tue, 12 May 1998 23:06:33 +0000; To: <amps@contesting.com> Hi Jon, Absolutely no difference at all for VHF Jon. The tuning cap looks like a very low impedance, the tank inductor and leads a high series impedance, and the loading cap; /archives//html/Amps/1998-05/msg00192.html (11,127 bytes)
6. [AMPS] Re: Parasitics (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 13 May 98 01:22:15 -0800; To: <amps@contesting.com> I agree on the tank inductor point, Mr. Rauch. However, as I recall you measured numerous VHF resonances in someTune caps., which means that C-Tune is not necessarily a "ver; /archives//html/Amps/1998-05/msg00196.html (11,591 bytes)
7. [AMPS] Re: Parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Wed, 13 May 1998 10:00:04 +0000; To: <amps@contesting.com> You recall incorrectly. The only resonance I found below several hundreds of MHz was a series resonance, where impedance went almost to zero. If the capacitor had a parallel; /archives//html/Amps/1998-05/msg00200.html (10,355 bytes)
8. [AMPS] Re: Parasitics (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 13 May 98 11:40:09 -0800; To: <amps@contesting.com> What is the impedance of a series resonance, slightly off-resonance. If the mysterious VLF signal is essentially blocked from entering the tank by the high reactance of the; /archives//html/Amps/1998-05/msg00203.html (11,857 bytes)
9. [AMPS] Re: Parasitics (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 13 May 1998 16:07:51 -0400; I have repeatably (not repeatedly, or at least not very often) demonstrated tune-C arcing in my SB-220 in the SSB position. It's an earlier unit, with the narrower-spaced tune-C. In all cases, the ar; /archives//html/Amps/1998-05/msg00206.html (9,849 bytes)
10. [AMPS] Re: Parasitics (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Wed, 13 May 98 21:08:41 -0500; This anode and tank voltage is obviously the voltage of the HF signal. And it is an AC signal, not the DC like the anode supply. If the HF tank voltage can vary wildly and do what you say, which I b; /archives//html/Amps/1998-05/msg00209.html (10,207 bytes)
11. [AMPS] Re: Parasitics (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Wed, 13 May 1998 22:47:55 EDT; I disagree that that is a legitimate test Tom. If as you claim, the Load C is a VHF short then you will not develop the tank circuit voltages further back into the amp. Been there, done that and the; /archives//html/Amps/1998-05/msg00212.html (12,244 bytes)
12. [AMPS] Re: Parasitics (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Wed, 13 May 98 22:08:24 -0500; Amen...We agree, Carl.. Now that Tom is back in the discussion, it seems that both Tom and Rich claim the same things. Both claim the other is wrong; both claim the other insults only and doesn't us; /archives//html/Amps/1998-05/msg00214.html (9,082 bytes)
13. [AMPS] Re: Parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Wed, 13 May 1998 23:23:33 +0000; To: <amps@contesting.com> and N4ZR Pete replied: Rich claimed a K5 had parasitics in his 922 because "mistuning and misloading can not cause excess tank voltage or arcs. The K5 showed up and correct; /archives//html/Amps/1998-05/msg00216.html (10,155 bytes)
14. [AMPS] Re: Parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Thu, 14 May 1998 00:40:58 +0000; To: <amps@contesting.com> Hello Jon, Very good Jon. Nothing at all, except the load presented by the tank. The reason the HF signal can swing so freely is the tank has high HF Q and is resonant. For; /archives//html/Amps/1998-05/msg00220.html (13,330 bytes)
15. [AMPS] Re: Parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Thu, 14 May 1998 00:40:58 +0000; To: <amps@contesting.com> <snip> Hi Carl, I'll respond to any technical question. Do you have one? 73, Tom W8JI w8ji.tom@MCIONE.com -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: a; /archives//html/Amps/1998-05/msg00221.html (8,088 bytes)
16. [AMPS] Re: Parasitics (score: 1): Author: measures@vc.net (Rich Measures); Date: Thu, 14 May 98 01:21:12 -0800; To: <amps@contesting.com> Is a bad lightning arrestor breaking down the same thing as deliberate mistuning? Rich... R. L. Measures, 805-386-3734, AG6K -- FAQ on WWW: http://www.contesting.com/ampfaq.; /archives//html/Amps/1998-05/msg00223.html (11,332 bytes)
17. [AMPS] Re: Parasitics (score: 1): Author: measures@vc.net (Rich Measures); Date: Thu, 14 May 98 01:21:22 -0800; To: <amps@contesting.com> Just for fun, the next time you are doing a Spring-cleaning/oiling on your HF amplifier, pull the mains-plug and couple a dipmeter to the tank L in order to find the resonan; /archives//html/Amps/1998-05/msg00225.html (16,695 bytes)
18. [AMPS] Re: Parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Thu, 14 May 1998 09:48:03 +0000; To: <amps@contesting.com> Yes, so far as the PA is concerned they are identical. That's why I said "mistuning or misloading". During a load fault, the PA is no longer properly matched to the load. If; /archives//html/Amps/1998-05/msg00226.html (10,848 bytes)
19. [AMPS] Re: Parasitics (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Thu, 14 May 98 09:13:27 -0500; Tom, How can a series resistance of 100 Ohms or so be greater than the K-Ohm impedance of the anode circuit? The conventional concept of a supressor is that the coil chokes the VHF signal and the re; /archives//html/Amps/1998-05/msg00228.html (9,321 bytes)
20. [AMPS] Re: Parasitics (score: 1): Author: measures@vc.net (Rich Measures); Date: Thu, 14 May 98 09:08:13 -0800; To: <amps@contesting.com> -- Interested in this embarrassment? See Will's archive for: The bad lightning arrestor that arced was not in in PA. It was connected in the coax that fed the antenna. agree; /archives//html/Amps/1998-05/msg00230.html (10,530 bytes)

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