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Total 573 documents matching your query.

241. Re: [Amps] Ameritron REPLACEMENT Capacitor Board (Shameless Plug...) (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Fri, 31 Mar 2017 20:56:08 -0500
Sorry!! Link to the Mouser parts list for the Ameritron board is here: http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=02a0112709 73 Jim W7RY Sorry Steve! I changed the name of the f
/archives//html/Amps/2017-03/msg00159.html (12,136 bytes)

242. Re: [Amps] New Amplifier (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Mon, 10 Apr 2017 12:49:10 -0500
I'll keep my two homebrew amplifiers for SO2R. One 8877, the other pair of 3cx800s. Or the monoband 8877s that I'm building for the K5GO contest station. 73 Jim W7RY as shown in their video. Where th
/archives//html/Amps/2017-04/msg00054.html (9,508 bytes)

243. Re: [Amps] Tubes, transistors, and 'abuse' (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Tue, 11 Apr 2017 20:23:34 -0500
It's fun to see you quarreling, once again, over the "are tubes or transistors better" question! I thought this had been about settled, back around 1960 so or... When you handle them, do you have an
/archives//html/Amps/2017-04/msg00087.html (9,321 bytes)

244. [Amps] RF in Vehicles (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Thu, 20 Apr 2017 11:30:06 -0500
Agree to all of what Jim, K9YC says here! 73 Jim W7RY VHF/UHF in a vehicle is FAR less likely to cause problems with automotive electronics that HF. Two very important reasons. First, power levels ar
/archives//html/Amps/2017-04/msg00137.html (9,361 bytes)

245. [Amps] Arco 30 Series Trimmer Cap Nuts (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Sat, 29 Apr 2017 13:59:56 -0500
I hope its okay if I post an amplifier related post on this forum.... :( Does anyone know what type of nut is used on an Arco 30 Series ceramic compression trimmer capacitor? None of the standard (SA
/archives//html/Amps/2017-04/msg00440.html (6,915 bytes)

246. Re: [Amps] Arco 30 Series Trimmer Cap Nuts (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Sun, 30 Apr 2017 21:04:51 -0500
Been to that link. Looks like 10 bucks per nut. There are lots of 12-40 taps on EBay. I'll try calling ARCO tomorrow to see what they say. Thanks! 73 Jim W7RY How about this: http://www.msi-viking.co
/archives//html/Amps/2017-04/msg00458.html (11,315 bytes)

247. Re: [Amps] 8877 filament. (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Thu, 4 May 2017 20:14:53 -0500
I believe you missed a turn in the road Randy... 73 Jim W7RY --Original Message-- From: Thomas Walsh Sent: Thursday, May 04, 2017 7:17 PM To: Randall, Randy Cc: Jim Thomson ; amps@contesting.com Subj
/archives//html/Amps/2017-05/msg00061.html (8,291 bytes)

248. Re: [Amps] Tunned Input (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Tue, 16 May 2017 21:52:06 -0500
Here is a link for a calculator: https://wetnet.net/rf_design/pinet.main.cgi I use a Q of 2.5. 73 Jim W7RY I am looking for the math formula to build a pi network tuned input. I find charts but want
/archives//html/Amps/2017-05/msg00162.html (7,380 bytes)

249. Re: [Amps] Still yet another interesting SS amp (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Sat, 20 May 2017 20:33:05 -0500
that could be bought in anything from I think 1-10 db, in 1 db increments. They are on EBay. Bought a 3 and 4 db 100 watt unit a few weeks ago. 73 Jim W7RY This is the latest german made SS amp, ful
/archives//html/Amps/2017-05/msg00191.html (9,532 bytes)

250. Re: [Amps] Stripping Litz (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Sat, 20 May 2017 20:35:48 -0500
What about a wire wheel in a drill or Dremel Tool? 73 Jim W7RY Hello Manfred, Thanks for the info on tinning Litz, and thanks to all who also contributed. Even using the hot air tip on a butane solde
/archives//html/Amps/2017-05/msg00192.html (11,465 bytes)

251. Re: [Amps] 3-500Z cool down time (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Tue, 6 Jun 2017 06:53:23 -0500
Yes. Eimac made graphite 3-500 tubes. The really old ones were graphite. I've had some. They are 1960s date codes. Looked like a Chinese/RF parts tube. 73 Jim W7RY IIRC, Eimac never made Graphite 3-5
/archives//html/Amps/2017-06/msg00076.html (10,550 bytes)

252. [Amps] Ten-Tec Titan 10 Meter Input SWR (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Sat, 10 Jun 2017 19:57:42 -0500
I know there are quite a few Titan owners here.... I have a friend that has a Titan that has high SWR input (1.7:1) on 10 meters. All the other bands are below 1.5:1. Tried different lengths of coax
/archives//html/Amps/2017-06/msg00141.html (6,542 bytes)

253. Re: [Amps] Ten-Tec Titan 10 Meter Input SWR (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Sun, 11 Jun 2017 21:32:53 -0500
**The 10-meter input circuitry is tunable. There may have been a component failure and, if so, that component needs to be replaced before tuning the input. Otherwise, just align the input circuitry a
/archives//html/Amps/2017-06/msg00181.html (10,281 bytes)

254. [Amps] New Wattmeters and Station Monitors (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Fri, 16 Jun 2017 19:58:39 -0500
Here are some new wattmeters and station monitor combinations. http://www.telepostinc.com/LP-500.html Enjoy 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesti
/archives//html/Amps/2017-06/msg00217.html (6,398 bytes)

255. Re: [Amps] About LP100A (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Tue, 20 Jun 2017 21:44:12 -0500
Yet another wattmeter.... https://shop.heathkit.com/shop/product/precision-rf-meter-hm-1002-pre-order-33 73 Jim W7RY Can a digital scope do Lissajous figures? <REPLY You might have me there, although
/archives//html/Amps/2017-06/msg00254.html (10,771 bytes)

256. Re: [Amps] FL-2100B input swr problem (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Fri, 30 Jun 2017 06:21:32 -0500
Is the input and output band switch still synced? Is the bandswitch knob in sync with the front panel? 73 Jim W7RY Inspect EVERYTHING between the output of your exciter and the first components in th
/archives//html/Amps/2017-06/msg00300.html (10,205 bytes)

257. Re: [Amps] FL-2100B input swr problem (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Fri, 30 Jun 2017 06:58:44 -0500
Yes and yes to the band switch being in sync. "SWR thru amp when in standby is fine". This has nothing to do with the SWR though the amplifier only when the amplifier is operating. 73 Jim W7RY --Orig
/archives//html/Amps/2017-06/msg00303.html (11,379 bytes)

258. Re: [Amps] Spring Channel Nuts (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Fri, 7 Jul 2017 18:15:51 -0500
A picture is worth a 1000 words. Can you post something and pass along the link? 73 Jim W7RY Please forgive me if this is the wrong forum. I have been happily building an amplifier and other things i
/archives//html/Amps/2017-07/msg00028.html (8,812 bytes)

259. Re: [Amps] Spring Channel Nuts (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Fri, 7 Jul 2017 20:11:00 -0500
Indeed! They are called unistrut spring nuts. Unistrut is also known as Kindorf. Tons of them here.. https://www.ebay.com/sch/i.html?_from=R40&_sacat=0&_nkw=unistrut+spring+nuts&_sop=15 73 Jim W7RY F
/archives//html/Amps/2017-07/msg00031.html (10,096 bytes)

260. Re: [Amps] Clipperton L (score: 1)
Author: "Jim W7RY" <jimw7ry@gmail.com>
Date: Fri, 21 Jul 2017 17:41:06 -0500
I would suspect the electrolytics. But without proper test equipment your just guessing. As suggested, a HV probe. And most good DVMs have a capacitor checker built in. Good luck 73 Jim W7RY Update:
/archives//html/Amps/2017-07/msg00079.html (8,301 bytes)

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