Mail Archive Search: <+from:jono@enteract.com>

Results:

References: [ +from:jono@enteract.com: 615 ]

Total 615 documents matching your query.

161. [AMPS] RF Surge Problem (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 26 Oct 99 17:06:29 -0500; Why effectively lower your modulation level in order to set your power? That's not so good. That's why some folks have such poor audio. They back their audio off to control their power. IMHO, the PA; /archives//html/Amps/1999-10/msg00651.html (8,579 bytes)
162. [AMPS] Have Cake & Eat it too (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 9 Sep 99 11:40:30 -0500; Someone suggested this belongs on Tower Talk - NOT! It's an amplifier related question. If you have a high SWR, your power meter WILL very likely read higher power than would be read under a "normal"; /archives//html/Amps/1999-09/msg00048.html (10,706 bytes)
163. [AMPS] Have Cake & Eat it too (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 9 Sep 99 15:58:35 -0500; OK, Let's try to make some sense to this: 1.) Do you have a dummy load? If so, try running the amp on the affected band into the dummy load. Does all work fine then? 2.) What SWR do you get on your a; /archives//html/Amps/1999-09/msg00054.html (11,618 bytes)
164. [AMPS] Have Cake & Eat it too (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 10 Sep 1999 00:33:01 -0500; The SWR should remain the same no matter what you do to the tuning of the amp. If the SWR changes with power, then you do have a problem with the coax. What kind of coax are you using? I hope RG-8 or; /archives//html/Amps/1999-09/msg00068.html (9,766 bytes)
165. [AMPS] Have Cake & Eat it too (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 10 Sep 1999 00:35:54 -0500; Yes. Adjusting the load control on the amp effectively tunes the tank of the amp to somewhat match the impedance seen on the transmission line. However, in terms of an SWR meter and a 50 Ohm system,; /archives//html/Amps/1999-09/msg00069.html (9,346 bytes)
166. [AMPS] Have Cake & Eat it too (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 10 Sep 99 11:54:33 -0500; Your 40m dipole is likely just mis-tuned. Tuning is pretty sharp on a lot of these. Regarding your other numbers - well, I don't think things are changing THAT much between high and low power. Someti; /archives//html/Amps/1999-09/msg00075.html (9,528 bytes)
167. [AMPS] More Amps Pix (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 17 Sep 99 09:35:36 -0500; Yeah but, Rich, Jim uses no nichrome! :-) 73, Jon KE9NA -- The Second Amendment is NOT about duck hunting! Jon Ogden jono@enteract.com www.qsl.net/ke9na "A life lived in fear is a life half lived." -; /archives//html/Amps/1999-09/msg00141.html (7,297 bytes)
168. [AMPS] 4-1000A plans (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 17 Sep 99 15:38:01 -0500; Agreed with most. But 8171's are more costly. Also who says you have to drive a pair of 4-1Ks with 350 Watts? That would assume that a single 4-1K would need to be driven with 175 Watts. I drive my s; /archives//html/Amps/1999-09/msg00148.html (8,096 bytes)
169. [AMPS] 4-1000A plans (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 17 Sep 99 16:46:02 -0500; Agreed. The more juice the better! Cool! Was urs a two-holer or a single like mine? Yeah, that kinda voltage is scary, especially when something goes wrong as always happens in building an amp (findi; /archives//html/Amps/1999-09/msg00151.html (8,483 bytes)
170. [AMPS] 4-1000A plans (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 17 Sep 99 16:51:02 -0500; Yeah, but Rich, unless they trip over one at an estate sale, MOST hams wouldn't even come into possession of one in the first place. WHO drives a 4-1K with 3500 volts? That would be majorly silly. So; /archives//html/Amps/1999-09/msg00152.html (9,221 bytes)
171. [AMPS] 4-1000A plans (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Mon, 20 Sep 99 09:14:05 -0500; ??????? Huh? Let's see: With 6 KV on plate and 90 Watts of drive I get 1500 out. Sure you could run 3500 volts and 175 W drive, but why would you want to? That's my question. Crap about nichrome and; /archives//html/Amps/1999-09/msg00179.html (8,147 bytes)
172. R: [AMPS] Silver Plating question (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Mon, 20 Sep 1999 22:52:25 -0500; Unfortunately, I don't have all of the messages to this thread on my machine here at home, so I'll probably have to post a follow up from work tomorrow morning. Anyhow, silver is a FAR, FAR better co; /archives//html/Amps/1999-09/msg00191.html (9,002 bytes)
173. [AMPS] Power Supply Spec Question (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Mon, 20 Sep 1999 22:56:01 -0500; Hi Jim, Astron tends to rate their supplies VERY conservatively. The RS-70 could really put out nearly 70 amps continuous with no problem other than getting hot. I had an RS-35 and many times I peake; /archives//html/Amps/1999-09/msg00192.html (8,776 bytes)
174. [AMPS] Silver Plating (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Wed, 22 Sep 1999 22:53:54 -0500; I'll get you technical reasons. All I have to do is ask. 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/1999-09/msg00231.html (8,177 bytes)
175. [AMPS] Silver Plating in Commercial Products (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 23 Sep 99 09:56:36 -0500; Hi all, I found out why the company I sell for silver plates their cavity filters. The filters are hogged out of a block of aluminum. Aluminum stinks as an RF conductor as the losses are too high. Th; /archives//html/Amps/1999-09/msg00240.html (9,225 bytes)
176. [AMPS] Silver Plating in Commercial Products (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 23 Sep 99 16:35:31 -0500; Well, a silver plated antenna probably WOULD conduct better than pure aluminum! But would you pay for it? Perhaps the Q of an antenna is not critical like the Q in a resonant cavity. Material losses; /archives//html/Amps/1999-09/msg00244.html (7,735 bytes)
177. [AMPS] Where to read Reflected Power (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Mon, 27 Sep 1999 23:23:49 -0500; Jim, Lots of possible issues on this one. At 10m, many of the HF type characteristics begin to break down and you are nearly into the VHF region anyhow. Line lengths, etc can become more important. H; /archives//html/Amps/1999-09/msg00269.html (12,355 bytes)
178. [AMPS] Where to read Reflected Power (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 28 Sep 99 12:46:12 -0500; Rich, it is NOT bologna! The impedance at the feedpoint of the antenna does NOT change because you put a tuner in the line. If you think that it does, I have a bridge to sell you. The tuner DOES tran; /archives//html/Amps/1999-09/msg00284.html (10,859 bytes)
179. [AMPS] Where to read Reflected Power (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 28 Sep 99 12:49:46 -0500; Perhaps buffer isn't the right word. Yes, it does transform the impedance. The conjugate match is between the exciter and the tuner. However, a tuner does NOT make a 750 Ohm antenna into a 50 Ohm ant; /archives//html/Amps/1999-09/msg00285.html (9,937 bytes)
180. [AMPS] Where to read Reflected Power (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 28 Sep 99 12:56:04 -0500; I stand corrected. You are correct! It was late last night and I was quite tired and also didn't have my textbooks at home to verify what I was saying! Yes, the voltage along the line varies and the; /archives//html/Amps/1999-09/msg00288.html (9,919 bytes)

Current List: 161 - 180
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]