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101. [AMPS] Technical Question #1 (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Thu, 21 May 98 22:44:02 -0500; True. I have heard there are many errors. Nonetheless, it IS a very good reference. I have lots of other textbooks from my college days. 73, Jon KE9NA -- Jon Ogden KE9NA http://www.qsl.net/ke9na "A; /archives//html/Amps/1998-05/msg00456.html (8,922 bytes)
102. [AMPS] Re: Parasitics (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Thu, 21 May 98 22:49:19 -0500; Perhaps I misunderstood you, Tom. It sounded like you were saying that you could use one of the MFJ analyzers to measure the input return loss and reflection angle of a tube. And I am saying that on; /archives//html/Amps/1998-05/msg00457.html (9,518 bytes)
103. [AMPS] Technical Question #1 (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Thu, 21 May 98 22:55:46 -0500; [snip] Tom, All I am trying to do is get to the truth here by asking very *specific* questions. Rich claims you said that you've seen VHF oscillation damage in SB-220s. You say it's not true, that y; /archives//html/Amps/1998-05/msg00458.html (9,543 bytes)
104. [AMPS] Technical Question #1 (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Thu, 21 May 98 23:00:34 -0500; Tom, Where is the insult here? I have not called you any names. I have not impuned your technical abilities. I have not said one deragatory thing about you. Please, do not take questions as insults.; /archives//html/Amps/1998-05/msg00459.html (10,145 bytes)
105. [AMPS] parasitics (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Thu, 21 May 98 23:03:24 -0500; ARRL Handbook Bill Orr's Radio Handbook Elmering of several other hams etc...... It's not "accurate" but it will tell you if there is HF or VHF energy present. 73, Jon KE9NA -- Jon Ogden KE9NA http:; /archives//html/Amps/1998-05/msg00460.html (9,074 bytes)
106. [AMPS] bent filament calculation (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Thu, 21 May 98 23:29:10 -0500; John, Thanks again for a wonderfully technical and engaging post! You are a fountain of knowledge! Anyhow, this was good and did definitely answer some of the persistent questions I had. Explained e; /archives//html/Amps/1998-05/msg00461.html (7,232 bytes)
107. [AMPS] low output on 10 (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Fri, 22 May 98 09:14:52 -0500; This is a question I am having too. My 4-1000A puts out several hundred less watts on 10 meters than on 80 (1000 on 10 vs. 1700 on 80). Does the gain of the tube drop from 80 to 10 meters that much; /archives//html/Amps/1998-05/msg00480.html (7,904 bytes)
108. [AMPS] Technical Question #1 (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Fri, 22 May 98 09:25:55 -0500; However, Rich, I have problems with the concept of VHF oscillations causing bandswitch damage. The tank circuit rejects VHF signals. So I fail to see how the VHF voltage could get high enough. Rathe; /archives//html/Amps/1998-05/msg00481.html (9,555 bytes)
109. [AMPS] Technical Question #1 (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Fri, 22 May 98 13:57:58 -0500; I've seen them. Well, you bring up a good point....... Yeah, I guess this is quite possible. However, I would like to analyze the circuit a little more before just agreeing with you. I am not talkin; /archives//html/Amps/1998-05/msg00490.html (10,843 bytes)
110. [AMPS] Excess hfe and ft (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Fri, 22 May 98 17:42:37 -0500; I didn't see the question posted...So I don't know what it was! :-) And perhaps I didn't have an answer or comment (it does happen sometimes!). Ok Arlen, I am confused here. You say that power FETs; /archives//html/Amps/1998-05/msg00492.html (8,827 bytes)
111. [AMPS] Excess hfe and ft (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Fri, 22 May 98 20:14:57 -0500; the cousins. 73, Jon KE9NA -- Jon Ogden KE9NA http://www.qsl.net/ke9na "A life lived in fear is a life half lived." -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.; /archives//html/Amps/1998-05/msg00503.html (7,607 bytes)
112. [AMPS] Excess hfe and ft (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Fri, 22 May 98 20:23:53 -0500; Carl, is correct! It's amazing how far microwave amplifiers and such have progressed in the last 10 years. Just 5 or 6 years ago, no one was doing 1 watt amplifiers in industry standard plastic pack; /archives//html/Amps/1998-05/msg00507.html (7,894 bytes)
113. [AMPS] Sealing of RF chamber (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Fri, 22 May 98 21:01:19 -0500; Hi all, I am in the process of putting my 4-1000 amp back together. YES! Anyhow, the original builder used silicone between the part of the chassis underneath the blower and the bottom panel. I'll ca; /archives//html/Amps/1998-05/msg00508.html (8,010 bytes)
114. [AMPS] parasitics (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Sun, 24 May 98 00:34:41 -0500; Would Eimac even be the place to call about 3-500Zs since they no longer make glass tubes? Wouldn't Triton (I think they make them now) be better? 73, Jon KE9NA -- Jon Ogden KE9NA http://www.qsl.net; /archives//html/Amps/1998-05/msg00535.html (8,133 bytes)
115. [AMPS] where to find info (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Sun, 24 May 98 00:47:12 -0500; I have a 4-1000A amp here that was a homebrew I bought. I have been fighting it for the last 6 or 8 months plus....It's almost done now. I haven't found the tube to be any more unstable at 6 KV. The; /archives//html/Amps/1998-05/msg00537.html (11,083 bytes)
116. 3-500 manufacturers (was: Re: [AMPS] parasitics) (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Sun, 24 May 98 00:56:19 -0500; Interesting. I thought they made all the old Eimac glasses. They even still make the 4-1000A. I called and had them fax a data sheet. Who does manufacture 3-500s?? 73, Jon KE9NA -- Jon Ogden KE9NA h; /archives//html/Amps/1998-05/msg00538.html (7,211 bytes)
117. [AMPS] Amplifier Experiments! (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Sun, 24 May 98 10:31:03 -0500; OK... This morning I did some experiments with stability on 10 meters on my 4-1000A amp. First I put in my original supressor design. This consisted of 3 3watt metal film resistors in parallel with a; /archives//html/Amps/1998-05/msg00545.html (9,920 bytes)
118. [AMPS] Amplifier Experiments! (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Sun, 24 May 98 14:26:29 -0500; Haven't measured it. I probably could, but it's a good question. Definitely good suggestions. I'll think about it. For number one what value cap would one add in series? I haven't seen that before.; /archives//html/Amps/1998-05/msg00548.html (12,454 bytes)
119. [AMPS] where to find info (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Sun, 24 May 98 14:30:25 -0500; Yes, true. However, all the "specs" I've seen both from Eimac and several editions of W6SAI's book say the IM at 4000 V is -34 dB and at 5000 V it doesn't even list IM specs. I suppose that's cause; /archives//html/Amps/1998-05/msg00549.html (8,899 bytes)
120. [AMPS] Looking for an ammeter (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Sun, 24 May 98 14:38:48 -0500; Hi again, all... I am looking for a 1 amp ammeter that will mount in a 1.75" hole. The plate current meter I have on my amp right now only goes up to 500 mA. I can easily draw more current than that,; /archives//html/Amps/1998-05/msg00550.html (6,879 bytes)

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