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References: [ +from:royanjoy@ncn.net: 309 ]

Total 309 documents matching your query.

281. Re: [Amps] 120 Hz hum from Henry... (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Sat, 20 Feb 2010 11:29:34 -0600
"Be careful if you fix this. It's not tuned to *exactly* 120 Hz because that would cause a very high voltage to appear across the choke. Use the specified values if you replace anything." I strongly
/archives//html/Amps/2010-02/msg00589.html (7,053 bytes)

282. Re: [Amps] Alpha 86 light bulb (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Sat, 27 Feb 2010 11:55:51 -0600
Try: www.1000bulbs.com 73, Roy K6XK _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2010-02/msg00754.html (6,163 bytes)

283. Re: [Amps] exciter RF delays... (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Sat, 20 Mar 2010 10:40:20 -0500
"...Has anyone compiled a list of delay values for the various commercial transceivers that have been sold over the years? It would seem that such a list would be quite useful to hams trying to retro
/archives//html/Amps/2010-03/msg00414.html (6,518 bytes)

284. Re: [Amps] placement of RF choke... (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Sat, 20 Mar 2010 12:58:21 -0500
Hi, Let's think of it this way: connect an insulated wire around each disk from one side to the other, flat against the metal. The jumper is soldered to the antenna element on each side of the disk.
/archives//html/Amps/2010-03/msg00419.html (7,927 bytes)

285. Re: [Amps] placement of RF choke bypass cap (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Fri, 26 Mar 2010 10:23:20 -0500
"Where was it proved that RF was passing thru the chassis and not one of many possible openings? I asked that question days ago and no one cared to answer." Consider a small metal enclosure with a co
/archives//html/Amps/2010-03/msg00643.html (7,413 bytes)

286. Re: [Amps] cap id (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Sat, 31 Jul 2010 11:22:34 -0500
"HI-Q HPA 42 BC, 6800mmf +40 -20%. If I can find out who made this capacitor then I can ask them about the voltage that it is rated for. I was told it came off an amplifier and I would like to use it
/archives//html/Amps/2010-07/msg00391.html (6,739 bytes)

287. Re: [Amps] 50 w stud mount zeners (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Fri, 13 Aug 2010 12:33:12 -0500
"6A10s are a good choice, but for a high bias tube like a GS-35b you need a lot of them - about 40. (24 VDC x .6 V per diode)." CW key up / key down regulation is not good with a string of diodes. Wi
/archives//html/Amps/2010-08/msg00187.html (6,486 bytes)

288. Re: [Amps] 50 w stud mount zener (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Sat, 14 Aug 2010 10:36:27 -0500
ORIGINAL MESSAGE: REPLY: That's interesting, but I wonder how critical it is. With a fixed, hard-regulated bias point, changing it a volt or so would have little effect on the signal, so I'd think ha
/archives//html/Amps/2010-08/msg00200.html (7,666 bytes)

289. Re: [Amps] time to death... (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Thu, 11 Nov 2010 10:55:51 -0600
About - "you need a backup system - just in case your nifty micro controlled wonder goes south!" If your exhaust port aims straight up, simply fly a little thin-paper 'kite' tethered by three threads
/archives//html/Amps/2010-11/msg00154.html (6,510 bytes)

290. Re: [Amps] Titan meter lamps (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Mon, 28 Mar 2011 10:22:02 -0500
"All of the light bulbs in the meters on subject amp have blown out. I plan to replace them all with LED's. Getting access to the metering board looks like a hassle though. Has anyone done this job a
/archives//html/Amps/2011-03/msg00223.html (6,683 bytes)

291. [Amps] What's with RF Parts? (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Thu, 14 Apr 2011 09:01:29 -0500
A month and a half ago I returned tubes under warranty after obtaining an R-number over the phone. Now they do not respond to email inquiries nor to phone inquiries left on the answering machine afte
/archives//html/Amps/2011-04/msg00406.html (6,945 bytes)

292. Re: [Amps] GU84B tube (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Wed, 20 Apr 2011 11:33:28 -0500
"I'm just gathering information about the GU84B tubes. I want to build an amplifier with this tube for the HF bands. I got the tubes, HF parts and other misc. parts. Will use the G3SEK boards etc. Bu
/archives//html/Amps/2011-04/msg00484.html (7,365 bytes)

293. Re: [Amps] PA choke design (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Wed, 29 Jun 2011 08:56:32 -0500
Re: "...I would like to get the group opinion on - using a long/big normal air wound coil to get around 1 mH (coil not involved in "matching" i.e. impedance well above circuit impedance at the anode.
/archives//html/Amps/2011-06/msg00313.html (7,325 bytes)

294. Re: [Amps] relay (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Thu, 26 Jan 2012 07:42:30 -0600
"Any idea where I might get a transfer relay for an LK-500B, looks like a DPDT Jennings ..." (Cheap) Thanks Ed K0KL Try GigaVac. Remember, they have discounts for hams. 73, Roy K6XK Iowa ____________
/archives//html/Amps/2012-01/msg00199.html (6,663 bytes)

295. Re: [Amps] Guidelines.....toroids for tank ckts (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Sat, 24 Mar 2012 15:17:33 -0500
'T'was asked, "I'm looking at alternatives to rebuild a tank circuit in a 1.5kw HF amp. I'm interested in using toroids rather than air-core coils and with that, a different (non-tapped, separate coi
/archives//html/Amps/2012-03/msg00258.html (7,185 bytes)

296. Re: [Amps] question for experts (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Tue, 3 Apr 2012 12:40:43 -0500
Since I use a PIN diode unit for QSK, and it uses coupling caps rated less than the plate voltage, I use a hefty choke at the amp's output. It's a 2.4-inch ferrite toroid core wrapped with 14 turns o
/archives//html/Amps/2012-04/msg00040.html (6,554 bytes)

297. Re: [Amps] soldering vs crimping (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Fri, 4 May 2012 10:04:57 -0500
"Its always better to crimp AND solder the center conductor unless you feel lucky but dont blame the connector if it blows in a contest or pileup......especially the QRO crowd." Gosh...and all that d
/archives//html/Amps/2012-05/msg00171.html (6,669 bytes)

298. Re: [Amps] SB-230 drive.... (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Wed, 27 Mar 2013 08:34:27 -0500
"I have been fighting with my SB-230. Initially I was getting 500 watts CW key down with about 85 watts drive and over 600 on my peak reading meter on SSB. I slowly lost gain and finally I was only a
/archives//html/Amps/2013-03/msg00344.html (7,193 bytes)

299. Re: [Amps] tube replacement (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Sun, 28 Apr 2013 11:41:27 -0500
About-- "What is a good replacement tube for a 4cx1600 in the TenTec model 416 amp..Has anyone changed out the tube?" One (big) consideration is 'how much metal work are you willing to do'? A friend
/archives//html/Amps/2013-04/msg00240.html (7,075 bytes)

300. Re: [Amps] 572B... (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Wed, 1 May 2013 09:32:31 -0500
"I need a set of 572B tubes for my SB-200 but seems like RF Parts doesn't have any." They seem to be working on their website. They have lots of 'em. 73, Roy K6XK ____________________________________
/archives//html/Amps/2013-05/msg00000.html (5,812 bytes)

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