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201. [AMPS] A-1015-G Part 2 (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 1 Jun 1999 23:03:32 -0500; OK, more on the A-1015-G preamp problems. After further study of the circuitry, I determined that I was looking at the preamp FET backwards. I had the drain and gates reversed. So I do see DC voltage; /archives//html/Amps/1999-06/msg00022.html (7,538 bytes)
202. [AMPS] Re: Ferrite Rod for 6M Amp (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Wed, 2 Jun 99 08:53:51 -0500; I stand corrected. And now that I think about it, I don't know why I rushed to agree with Tom. If the IM distortion was caused just be the preamps in rigs like the FT-1000D and mixers are hard to ov; /archives//html/Amps/1999-06/msg00042.html (9,182 bytes)
203. [AMPS] Rig IMD (wass: Re: Ferrite Rod for 6M Amp) (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Wed, 2 Jun 99 15:52:44 -0500; Hi Tom, I misunderstood your first post on it. Upon reading your second post (after mine), I realized you were talking problems specific to the FT-1000 not problems in general. By the way, which mode; /archives//html/Amps/1999-06/msg00065.html (9,811 bytes)
204. [AMPS] Coils (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Wed, 2 Jun 1999 18:53:24 -0500; You should see him after a few beers! 73, Jon KE9NA -- Jon Ogden KE9NA http://www.qsl.net/ke9na <-- CHECK IT OUT! It's been updated!!!!! "A life lived in fear is a life half lived." -- FAQ on WWW: h; /archives//html/Amps/1999-06/msg00071.html (7,059 bytes)
205. [AMPS] RE: Phase noise and IMD (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 3 Jun 99 10:32:32 -0500; Tom, Do you have any documentation (schematics, parts list, etc) for these mods so that the rest of us can perform them? 73, Jon KE9NA -- The Second Amendment is NOT about duck hunting! Jon Ogden jo; /archives//html/Amps/1999-06/msg00092.html (7,338 bytes)
206. [AMPS] PIN stuff (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 3 Jun 99 16:34:12 -0500; Hi George, Paralleling PIN diodes is a fine way to increase the power handling of a circuit. I don't see any problems other than the fact that as you point out, junction C is increased. However, tha; /archives//html/Amps/1999-06/msg00100.html (8,338 bytes)
207. [AMPS] Bias for SB-220 (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 4 Jun 1999 07:27:27 -0500; I guess Rich and I will never be in a QSO of more than hello and goodbye! I HATE VOX most of the time! 73, Jon KE9NA ps: When in a ragechew, my mic button normally is in the "locked" position! -- Jo; /archives//html/Amps/1999-06/msg00110.html (9,301 bytes)
208. [AMPS] IMD & Phase noise (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 4 Jun 1999 07:25:31 -0500; I would call that HIGHLY unusual! All marketing typically cares about is what they feel customers want. Never mind that it isn't technically possible in a cost effective and manufacturable form. 73,; /archives//html/Amps/1999-06/msg00111.html (8,195 bytes)
209. [AMPS] Bias for SB-220 (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 4 Jun 99 09:11:07 -0500; Oops! I let the cat out of the bag! No, the ragechew only happens when SSTVers QRM me during a contest when I am several KCs away from their precious freqeuncy that they believe they own. The correc; /archives//html/Amps/1999-06/msg00119.html (9,118 bytes)
210. [AMPS] Vox (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 4 Jun 99 09:14:52 -0500; Well, I don't continually hold down the mic button. Only while I am talking! Telephone is full duplex. Ham radio isn't. Or are you saying that even with a telephone it's not truly full duplex but sw; /archives//html/Amps/1999-06/msg00120.html (7,765 bytes)
211. [AMPS] Vox (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 4 Jun 99 09:44:54 -0500; Well, OK, you got me there, Peter. Although, the switching that occurs is not so much of a vox, but a channel sharing arrangement. When your call occupies the channel it is full duplex in both direc; /archives//html/Amps/1999-06/msg00127.html (7,713 bytes)
212. [AMPS] TL-922 Filament Transformer Protection (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Sun, 6 Jun 1999 20:52:01 -0500; I disagree, Tom. While some parasitic oscillations in amplifiers are well behaved, some are not. In my 4-1000A, for the longest time while building it I had a slight oscillation that I could produce; /archives//html/Amps/1999-06/msg00174.html (11,244 bytes)
213. [AMPS] TL-922 Filament Transformer Protection (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Sun, 6 Jun 1999 20:59:39 -0500; HOW? How does closing a relay wether it is a hot closure or not produce a transient in anode current? I always thought anode current (other than bias current) was produce by a driving signal. Hot sw; /archives//html/Amps/1999-06/msg00175.html (10,193 bytes)
214. [AMPS] Vox efficient... (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Sun, 6 Jun 1999 21:01:29 -0500; So in your view, anyone who doesn't use VOX is a lid? 73, Jon KE9NA -- Jon Ogden KE9NA http://www.qsl.net/ke9na <-- CHECK IT OUT! It's been updated!!!!! "A life lived in fear is a life half lived."; /archives//html/Amps/1999-06/msg00176.html (7,537 bytes)
215. [AMPS] TL-922 Filament Transformer Protection (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Sun, 6 Jun 1999 22:10:52 -0500; OK, agreed. I should have been more specific. Rich was talking about how hot switching the INPUT of an amp causes an anode transient. That's what I have a difficulty with. Problems with hot switchin; /archives//html/Amps/1999-06/msg00179.html (10,385 bytes)
216. [AMPS] TL-922 Filament Transformer Protection (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Mon, 7 Jun 1999 07:16:20 -0500; Is the amplitude of a spark that is generated by hotswitching a 100W signal on the input relay really large enough to drive the tube and thereby generate a change in anode current on the output? 73,; /archives//html/Amps/1999-06/msg00185.html (9,997 bytes)
217. [AMPS] TL-922 Filament Transformer Protection (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Mon, 7 Jun 99 08:58:18 -0500; OK. Since I have no idea of the frequency the oscillation occured at, I can't confirm or refute your statement. 73, Jon KE9NA -- The Second Amendment is NOT about duck hunting! Jon Ogden jono@entera; /archives//html/Amps/1999-06/msg00193.html (10,015 bytes)
218. [AMPS] TL-922 Filament Transformer Protection (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Mon, 7 Jun 99 09:10:10 -0500; MY POINT EXACTLY! Let's nor forget too, that as you increase in frequency, the output capacitance of the tube becomes a greater percentage of the total first capacitance in the tank circuit (C1 = Ct; /archives//html/Amps/1999-06/msg00194.html (11,555 bytes)
219. [AMPS] parasitic fantasia (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Mon, 7 Jun 99 09:15:29 -0500; I thought that most of the TVI reduction came from the low pass action of the tank circuit. Or are we saying the same thing? Tom, help me understand something here. One of the things that can cause; /archives//html/Amps/1999-06/msg00195.html (8,725 bytes)
220. [AMPS] TL-922 Filament Transformer Protection (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Mon, 7 Jun 99 16:05:23 -0500; That still doesn't mean that the resistors are at room temperature. Fast moving air at 100° C still spells an ambient temperature of 100° C. And the resistor's dissipation ratings are corres; /archives//html/Amps/1999-06/msg00218.html (10,959 bytes)

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