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261. [Amps] New 4-1000 Tubes ? (score: 1)
Author: donroden@hiwaay.net
Date: Wed, 02 Jan 2013 21:32:03 -0600
Does anyone still sell new 4-1000A Tubes ( 8166 ) ? Don W4DNR _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2013-01/msg00029.html (7,124 bytes)

262. [Amps] Peter Dahl Transformers (score: 1)
Author: donroden@hiwaay.net
Date: Fri, 08 Feb 2013 12:19:28 -0600
?2/7/13 - Harbach Electronics, which took over the Peter Dahl designs has announced on their website that they will be no longer building, selling, nor supporting the transformers, etc, that came to
/archives//html/Amps/2013-02/msg00064.html (8,865 bytes)

263. Re: [Amps] Peter Dahl Xformers: Another MFR? (score: 1)
Author: donroden@hiwaay.net
Date: Sat, 16 Feb 2013 10:03:30 -0600
I am pondering on making them too. I worked at Peter Dahl for 35 years and out of respect for Jeff I didn't before but now maybe!!   Gary L. Komassa Gary, The Amateur and Commercial Broadcast fields
/archives//html/Amps/2013-02/msg00132.html (7,995 bytes)

264. Re: [Amps] 813 efficiency (score: 1)
Author: donroden@hiwaay.net
Date: Mon, 25 Feb 2013 11:46:47 -0600
Would you put them all in a row? Or a matrix of 3x4? Or 6x2? Or maybe in a circle? Can't wait to hear. :-) Six over six behind a huge glass panel. Turn out the lights !! Don W4DNR __________________
/archives//html/Amps/2013-02/msg00232.html (9,449 bytes)

265. Re: [Amps] BURNING IN A TUBE (score: 1)
Author: donroden@hiwaay.net
Date: Sat, 23 Mar 2013 15:53:51 -0500
Quoting TexasRF@aol.com: or condom is more likely to fail in the first few hours. Anything beyond three hours and it's a gamble. Don W4DNR _______________________________________________ Amps mailing
/archives//html/Amps/2013-03/msg00313.html (7,691 bytes)

266. Re: [Amps] BURNING IN A TUBE (score: 1)
Author: donroden@hiwaay.net
Date: Sat, 23 Mar 2013 18:34:14 -0500
It's a Barry White vs John Philip Sousa thing........ Don W4DNR On 3/23/2013 4:53 PM, donroden@hiwaay.net wrote: Quoting TexasRF@aol.com: or condom is more likely to fail in the first few hours. Anyt
/archives//html/Amps/2013-03/msg00316.html (9,385 bytes)

267. Re: [Amps] Look at this Custom 10kW Amp (score: 1)
Author: donroden@hiwaay.net
Date: Thu, 11 Apr 2013 00:58:06 -0500
My Corvette and my tires, and I'll turn the traction control off any time its not raining........... chirp.... chirp.... chirp... Don W4DNR _______________________________________________ Amps mailin
/archives//html/Amps/2013-04/msg00062.html (8,790 bytes)

268. Re: [Amps] Look at this Custom 10kW Amp (score: 1)
Author: donroden@hiwaay.net
Date: Thu, 11 Apr 2013 07:40:40 -0500
Bring it over to Germany, Don.  Legal to drive at it's maximum on many of the autobahns and tell me what lap time you set at the Nurburgring.  You won't catch the Porsches, but it'll sure as hell be
/archives//html/Amps/2013-04/msg00066.html (9,283 bytes)

269. Re: [Amps] Look at this Custom 10kW Amp (score: 1)
Author: donroden@hiwaay.net
Date: Thu, 11 Apr 2013 07:50:00 -0500
you have that much advantage in a competitive situation (like a DX pileup or contest) when you use that 10kW that you paid for. And it gets the BIG BOYS off the frequency faster, so it reduces total
/archives//html/Amps/2013-04/msg00067.html (6,953 bytes)

270. Re: [Amps] Look at this Custom 10kW Amp (score: 1)
Author: donroden@hiwaay.net
Date: Thu, 11 Apr 2013 12:32:13 -0500
My #2 son was trained by BMW as part of his USAF officer duties. Then he was allowed to take his twin turbo 335D on the track until he was happy. While it is far from the king of the Autobahn it is n
/archives//html/Amps/2013-04/msg00072.html (9,560 bytes)

271. Re: [Amps] Tuned input design / measurement questions (score: 1)
Author: donroden@hiwaay.net
Date: Tue, 16 Apr 2013 11:20:51 -0500
Quoting Vic K2VCO <k2vco.vic@gmail.com>: If you don't have a tuned input circuit in the amplifier, then the return path for the RF cathode current is through the coax and the transceiver output tank.
/archives//html/Amps/2013-04/msg00125.html (7,395 bytes)

272. Re: [Amps] HV resistor source (score: 1)
Author: donroden@hiwaay.net
Date: Wed, 17 Apr 2013 00:58:47 -0500
That's going to be quite a resistor, inasmuch as 4KV across a 30 ohm resistor amounts to a half million watts of dissipation! A 4KV pulse 50uS wide, once per second, would dissipate 25W. 73, Jim W8Z
/archives//html/Amps/2013-04/msg00149.html (7,680 bytes)

273. Re: [Amps] HV resistor source (score: 1)
Author: donroden@hiwaay.net
Date: Wed, 17 Apr 2013 07:35:48 -0500
If the tube draws more amps ... a short or a bad load... maybe a two amp spike... that is 120 watts which will hopefully burn out the resistor ( acting like a fuse ) before the transformer or diode
/archives//html/Amps/2013-04/msg00155.html (8,575 bytes)

274. Re: [Amps] LDG AT-100AMP (score: 1)
Author: donroden@hiwaay.net
Date: Mon, 03 Jun 2013 07:40:06 -0500
PS: Wanna know what a roo bar is? Its a place where roos unwind.and try to pick up Sheilas. Don W4DNR _______________________________________________ Amps mailing list Amps@contesting.com http://list
/archives//html/Amps/2013-06/msg00016.html (7,439 bytes)

275. [Amps] Nice Chock (score: 1)
Author: donroden@hiwaay.net
Date: Mon, 03 Jun 2013 20:06:38 -0500
http://www.ebay.com/itm/RF-PLATE-CHOCK-FOR-HF-LINEAR-AMPLIFIER-/321043924844?pt=LH_DefaultDomain_0&hash=item4abfb5876c _______________________________________________ Amps mailing list Amps@contestin
/archives//html/Amps/2013-06/msg00031.html (8,525 bytes)

276. Re: [Amps] Advice needed for SS amp (score: 1)
Author: donroden@hiwaay.net
Date: Wed, 05 Jun 2013 18:38:37 -0500
I'm thinking of water cooling. I'm thinking of running a full wave bridge rectifier directly off the 240 VAC line, thus eliminating the power transformer and giving about 340 VDC no-load. Sounds like
/archives//html/Amps/2013-06/msg00053.html (7,458 bytes)

277. Re: [Amps] The Carl and Jim Show (score: 1)
Author: donroden@hiwaay.net
Date: Wed, 05 Jun 2013 21:51:58 -0500
These guys slay me !!! They need to take it on the road and charge admission. LOL !!! Don W4DNR This is the most interesting Reflector I have read in awhile. Jim-VE7RF, and Carl-KM1H, I hope you guys
/archives//html/Amps/2013-06/msg00062.html (7,803 bytes)

278. Re: [Amps] Advice needed for SS amp (score: 1)
Author: donroden@hiwaay.net
Date: Wed, 05 Jun 2013 22:05:57 -0500
Seems to me the 50V limit would be a deal breaker. I love the idea of a transformerless design. I wonder if the THP problems were really the devices, as opposed to a design glitch they never figured
/archives//html/Amps/2013-06/msg00064.html (9,043 bytes)

279. Re: [Amps] Advice needed for SS amp (score: 1)
Author: donroden@hiwaay.net
Date: Wed, 05 Jun 2013 22:41:19 -0500
Someone back in the sixties ( SBE ?) made an amp with what ... 16 sweep tubes ? Don W4DNR Well.... maybe ten... http://www.radiowrench.com/sonic/so02192.html _________________________________________
/archives//html/Amps/2013-06/msg00065.html (8,451 bytes)

280. Re: [Amps] Advice needed for SS amp (score: 1)
Author: donroden@hiwaay.net
Date: Thu, 06 Jun 2013 04:24:21 -0500
A friend just built a 1kw EME Amp using the freescale and he has a whopper of a air cooled heatsink. The device is soldered directly to the copper spreader. Even so, he says that the top of the devic
/archives//html/Amps/2013-06/msg00082.html (9,655 bytes)

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