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References: [ +from:km1h@jeremy.qozzy.com: 394 ]

Total 394 documents matching your query.

241. Re: [Amps] Ten-Tec Titan 10 Meter Input SWR (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 14 Jun 2017 15:27:32 -0400
<I really appreciated the Amp Supply tuned input I put in the 4-1000A amp I made back in the 90's. It was pure simplicity and worked so well. I put one in a SB-220 as well with the same wonderful res
/archives//html/Amps/2017-06/msg00206.html (9,919 bytes)

242. Re: [Amps] Ferrite Core for 160M PI Output (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 15 Jun 2017 17:32:01 -0400
Going back to the original question about ferrite for a Pi network tank: I had always heard that powdered iron was better in a resonant MF or HF circuit because of better Q, so I am wondering why th
/archives//html/Amps/2017-06/msg00211.html (8,050 bytes)

243. Re: [Amps] issue with AL-1200 output -UPDATE NUMBER 2- (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 27 Jun 2017 09:18:03 -0400
It is just an example of a Hammy Hambone approach to a problem for an amp that literally took years to correct various stability problems. Carl Hello Merv, I understand the concept, I just didn't kno
/archives//html/Amps/2017-06/msg00285.html (13,475 bytes)

244. Re: [Amps] issue with AL-1200 output -UPDATE NUMBER 2- (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 27 Jun 2017 18:55:05 -0400
Adjustable spark gaps are also common on commercial AM modulation transformers down to at least the 500W size. These go back into the 40's and maybe earlier. Carl I have three Collins CU-1169 antenna
/archives//html/Amps/2017-06/msg00290.html (10,219 bytes)

245. Re: [Amps] SB220 step start blows fuses (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 5 Jul 2017 11:20:32 -0400
Both the filament and power transformer characteristics are well known BUT the On Off switch is unobtainium and the HV transformer will still thump at times when turned on depending on where in the A
/archives//html/Amps/2017-07/msg00012.html (15,237 bytes)

246. Re: [Amps] SB220 step start blows fuses (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Mon, 10 Jul 2017 09:32:47 -0400
I use a pair of 300W stadium lights with sockets I found at a fleamarket decades ago. It makes the initial tests foolproof. Carl -- Original Message -- From: "Gary Schafer" <garyschafer@largeriver.ne
/archives//html/Amps/2017-07/msg00044.html (14,195 bytes)

247. Re: [Amps] Could Use Some Advice (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 11 Jul 2017 20:41:54 -0400
The HV comes on with the power switch. It sounds like a shorted tube, try one at a time or none. If still broke there are other suggestions. Carl LK-500ZC owner since new in 86 -- Original Message --
/archives//html/Amps/2017-07/msg00061.html (8,305 bytes)

248. Re: [Amps] SB220 step start blows fuses (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 12 Jul 2017 21:05:43 -0400
The other tube is an early Eimac that was fragile when removing so the stiffener support of the pins was added. Carl Well I have a major update! The amp shipped with 2 3-500zs that are not full outpu
/archives//html/Amps/2017-07/msg00064.html (12,786 bytes)

249. Re: [Amps] SB220 step start blows fuses (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 12 Jul 2017 21:12:12 -0400
BTW, running filaments only does nothing except burn 50 watts. The anode needs to run at least at a bright red to degass. When the tube arcs even in the CW position it is usually a hard short but the
/archives//html/Amps/2017-07/msg00065.html (12,667 bytes)

250. Re: [Amps] Fil transformer (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 10 Aug 2017 12:17:23 -0400
You can do the same thing with a pair of 10 Ohm resistors and create a virtual CT. Carl -- Original Message -- From: "Kelly Taylor" <ve4xt@me.com> To: "Radio WC6W" <wc6w_amps@yahoo.com> Cc: <amps@con
/archives//html/Amps/2017-08/msg00003.html (10,149 bytes)

251. Re: [Amps] Fil transformer (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Fri, 11 Aug 2017 19:58:58 -0400
<How about the old time trick of putting two low value resistors to <ground, one from each side of the <filament, used to be used for a center tap many times in days of old. gg triode amp, in order t
/archives//html/Amps/2017-08/msg00012.html (11,842 bytes)

252. Re: [Amps] Grid dip meters 2 models, opinions? (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 5 Sep 2017 20:59:11 -0400
I find my vintage Measurements 59 GDO to be indispensible for amp and a lot of other RF work....it is my crowbar. Carl Hello all I have found 2 second hand grid dip meters. One is a Heathkit HD1250 p
/archives//html/Amps/2017-09/msg00028.html (9,168 bytes)

253. Re: [Amps] Plate coupling capacitor value (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sat, 9 Sep 2017 20:30:56 -0400
That goes back to the late 30's when SW broadcasting went above the 25, 22, and 19M bands and were still using older design tubes. The actual circuit was to tap the coil that was computed at a conven
/archives//html/Amps/2017-09/msg00055.html (10,969 bytes)

254. Re: [Amps] SB200 on 30 m (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Fri, 6 Oct 2017 21:21:04 -0400
Dont forget that a good location will increase the total gain up to 11 dB or so and if the TA program is used the height will be selected to put the power where wanted. An old CC 40-2CD is an easy co
/archives//html/Amps/2017-10/msg00099.html (12,870 bytes)

255. Re: [Amps] Amplifier lifetime (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Fri, 6 Oct 2017 21:22:18 -0400
<Hi Manfred, <I've got an NCL-2000 that has a similar history to yours. Like you, I seldom use it, but think it is a well-designed amplifier and arguably the nicest styling of any amp before or since
/archives//html/Amps/2017-10/msg00100.html (10,824 bytes)

256. Re: [Amps] Thoughts on LK-550 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Thu, 12 Oct 2017 13:39:34 -0400
If it is the later 550ZC model that is an excellent price considering that massive external transformer. OTOH 3 tubes a bit squirrely on 10M and removing one tube will make little if any difference o
/archives//html/Amps/2017-10/msg00124.html (7,890 bytes)

257. Re: [Amps] Alpha 9500 update and repair (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Fri, 20 Oct 2017 10:01:46 -0400
The only Alpha I own is a 76PA which I rebuilt from a Carribean contest station pile of parts over 20 years ago with bad transformer, tubes, filter caps, and bandswitch. It has been perfect ever sinc
/archives//html/Amps/2017-10/msg00134.html (15,454 bytes)

258. Re: [Amps] Extra Fan Mod for 87A (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 22 Oct 2017 20:40:00 -0400
My 76PA (3 tubes) already had that fan when it arrived here from a Carribean contest station. It didnt save the amp from a blown transformer, tubes, bandswitch, and more, thanks to very non technical
/archives//html/Amps/2017-10/msg00141.html (8,666 bytes)

259. Re: [Amps] Thunderbolt (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 8 Nov 2017 17:26:40 -0500
The Interceptor is the matching receiver to the Zeus. I use the pair often on 6M AM. Carl Clegg Zeus, Thor, Venus and Interceptor VHF transmitters and amps. Sounds much cooler than AL-80 :-) 73 Tom W
/archives//html/Amps/2017-11/msg00079.html (8,756 bytes)

260. Re: [Amps] Pole pigs removed from oil ?? (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 8 Nov 2017 17:41:28 -0500
My ancient Bird 3KW load built for RCA still has its couple of gallons of PCB's. I check the smell every few years and its not burn yet so it stays in use as it has for over 30 years here. My 1500W 2
/archives//html/Amps/2017-11/msg00080.html (10,040 bytes)

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