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301. [AMPS] FCC Actions at Dayton (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 21 May 99 14:50:22 -0500; I agree, Bill. I don't think we should encourage CBers to operate QRO. But why restrict the sale of ham amplifiers to hams on 10 Meters? The fact is that the same people who obey the CB laws would a; /archives//html/Amps/1999-05/msg00268.html (10,343 bytes)
302. [AMPS] FCC Actions at Dayton (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 21 May 99 15:03:09 -0500; Well, Dick, I am not a member of any militia movement, but I feel the same way you do and the majority of hams I talk to fell that way as well! Part of the problem with the government today. We don'; /archives//html/Amps/1999-05/msg00269.html (10,404 bytes)
303. [AMPS] Tube load resistance calculation (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Wed, 26 May 99 14:57:20 -0500; I think one could derive K from the math given in some of the more detailed textbooks than the ARRL handbook. But I don't believe it has anything to do with duty cycle. It is definitely a function o; /archives//html/Amps/1999-05/msg00309.html (7,908 bytes)
304. [AMPS] Digital HF Receivers (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 28 May 99 15:26:23 -0500; Well, it's not specifically an amplifier related topic, but this month's RF Design features an article on the concept of Digital HF receivers. It's an interesting article, but even more interesting t; /archives//html/Amps/1999-05/msg00329.html (6,972 bytes)
305. [AMPS] Input tuning (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 1 Apr 99 09:48:49 -0600; I am one of the advocates of this method. A couple of points: 1.) Do not remove the tubes. You will need them because they have a certain capacitance from cathode (or grid) to ground that you will n; /archives//html/Amps/1999-04/msg00011.html (8,525 bytes)
306. [AMPS] Resoldering 3-500Z Filament Pins ?? (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 1 Apr 99 15:51:25 -0600; One of Murphy's Laws of Electronics! The circuit intended to be protected BY the fuse will blow first, thereby protecting the fuse! Ouch! Makes me think of what I almost did. About a year ago I powe; /archives//html/Amps/1999-04/msg00021.html (9,925 bytes)
307. [AMPS] Resoldering 3-500Z Filament Pins ?? (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Sun, 4 Apr 1999 22:08:48 -0500; A sad story indeed. Sorry to hear about that. But you bring up a good point. HV filter caps can contain a significant voltage for quite a while even with bleeder resistors. The KV range meter might; /archives//html/Amps/1999-04/msg00075.html (10,747 bytes)
308. [AMPS] re: lubricating oil (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 6 Apr 99 08:40:56 -0500; It also works especially well to clean off the powder residue from the amplifier after you put a few bullet holes in it from being frustrated by it not working properly! :-) 73, Jon KE9NA -- Jon Ogd; /archives//html/Amps/1999-04/msg00099.html (7,069 bytes)
309. [AMPS] parasitic suppressors (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 6 Apr 99 13:23:53 -0500; Yup. Ditto. This is so true. You might not even need a typical RL parasitic suppressor in the anode. It all depends on the design of your circuit. If someone doubts me then how I was able to stabili; /archives//html/Amps/1999-04/msg00108.html (10,227 bytes)
310. [AMPS] Fwd: [HeathKit] Amps, solid state fixes, better tubes.... (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 6 Apr 99 13:49:11 -0500; This was forwarded from the Heath list. Thought someone here might be able to help. 73, Jon KE9NA -- Begin Forwarded Message -- To: <amps@contesting.com> Date: 04/06 12:18 Received: 04/06 13:47 From:; /archives//html/Amps/1999-04/msg00109.html (7,866 bytes)
311. [AMPS] parasitic suppressors (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 6 Apr 1999 23:12:39 -0500; If this is the case, then why is my amp stable WITHOUT any suppressor resistor at all? Or would you tell me that my amp ISN'T stable? You come and try to make it oscillate. You've ignored or not ack; /archives//html/Amps/1999-04/msg00123.html (9,637 bytes)
312. [AMPS] Parasitic suppressors/another question, (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Wed, 7 Apr 99 09:24:56 -0500; Here is what I did: First of all, if the amp is unstable you can easily make it oscillate. You can do this by a couple of ways. Keeping an eye on a TV is NOT the way as you have no idea of what freq; /archives//html/Amps/1999-04/msg00135.html (10,252 bytes)
313. [AMPS] Re: Electrical discharge through the heart (was Resoldering 3-500Z pins) (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Wed, 7 Apr 99 09:38:02 -0500; If one's heart has stopped, the person has gone into cardiac arrest. I think most people who go into cardiac arrest are unconscious. Therefore they are unable to turn off their HV supply and shock t; /archives//html/Amps/1999-04/msg00136.html (8,645 bytes)
314. [AMPS] B&W 852 Coil (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 8 Apr 99 10:07:16 -0500; NO! NO! NO! NO! The B&W 850 was NOT designed for the 4-1000A. It's inductance values are not even close and you have to do some real fiddling to make it work with proper Qs. The impedance of a 4-100; /archives//html/Amps/1999-04/msg00158.html (7,527 bytes)
315. [AMPS] Parasitic suppressors/another question, (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 8 Apr 99 16:46:20 -0500; Agreed. Still you can design an HF amp to be unconditionally stable and test for that condition as well. Well, then those amps have design problems. Did those oscillations that you mention from your; /archives//html/Amps/1999-04/msg00168.html (10,420 bytes)
316. [AMPS] parasitic suppressors (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 8 Apr 99 16:53:04 -0500; Hey Rich, do you have any plots from the spectrum analyzer of this? I don't doubt you, it would just be interesting to see. And you can satisfy a lot of curious on lookers by posting something like; /archives//html/Amps/1999-04/msg00169.html (9,981 bytes)
317. [AMPS] parasitic suppressors (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 8 Apr 1999 23:22:30 -0500; Next time your buddies are doing such a measurement, have them press the plot button. I'd love to see a picture of it. It is funny....any ham radio measurements I made back in the days when I had ac; /archives//html/Amps/1999-04/msg00179.html (8,986 bytes)
318. [AMPS] Parasitic suppressors/another question, (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 8 Apr 1999 23:33:53 -0500; Ah contrair! You yourself have said that the anode-resonant circuit is composed of Ctune. Is not Ctune in the tank circuit??? Sooooooo.......tuning the tank circuit DOES make a difference. Also, it; /archives//html/Amps/1999-04/msg00180.html (12,702 bytes)
319. [AMPS] Parasitic suppressors/another question, (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 8 Apr 1999 23:39:01 -0500; I say: So the bandswitch arced. OK, I'll give you that it could be an oscillation. But how can you say that Rsupp increased 100% AFTER the bandswitch arcing? Did you measure Rsupp BEFORE the bandswit; /archives//html/Amps/1999-04/msg00181.html (10,266 bytes)
320. [AMPS] Parasitic suppressors/another question, (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 9 Apr 99 09:43:08 -0500; Not necessarily, Rich. In many, many tubes (such as the 4-1K), the Canode of the tube can be large. In the YC-156 (I think) Canode is on the order of 35 pF. The 4-1K has a Cout of 7.6 pF. However, o; /archives//html/Amps/1999-04/msg00185.html (13,504 bytes)

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