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361. [AMPS] SB-220 Amplifiers and Garage Sales!! (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 27 Mar 2001 07:44:25 -0500; That's right Steve, neither Rich nor Peter are looking at the problem correctly. The effect of the rest of the system is such that LOWER Rp increases system Q. It does not guarantee a reduction in g; /archives//html/Amps/2001-03/msg00281.html (10,246 bytes)
362. [AMPS] Additional Tube Brand Questions (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 1 Feb 2001 07:56:52 -0500; Hi Jason, As far as I know, Svetlana never made and production 3-500Z tubes. As I recall they re-labelled some Chinese tubes, accidentally stamping "made in USSR" on them. There are a half-dozen sour; /archives//html/Amps/2001-02/msg00008.html (9,920 bytes)
363. [AMPS] Additional Tube Brand Question (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 1 Feb 2001 07:56:52 -0500; Hi Mike, You can not raise the HV too much before getting into trouble. Using a similar (same brand and model but with optimal contact arrangements) switch in failure tests, just under 3kV was the li; /archives//html/Amps/2001-02/msg00013.html (8,715 bytes)
364. [AMPS] Additional Tube Brand Question (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 1 Feb 2001 08:50:48 -0500; Peter, Rich suggests series rectifiers as zeners. Like with neutralization or parasitics, nothing else in the world except his exact ideas are acceptable. It doesn't matter if the regulation is wors; /archives//html/Amps/2001-02/msg00014.html (8,994 bytes)
365. [AMPS] Additional Tube Brand Questions (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 1 Feb 2001 17:49:29 -0500; Hi Stan, It was a bit better than the SB-220 in some aspects, but not in voltage rating of tank components. It also was not cooled better than the 220. While it had chimneys, the blower was MUCH too; /archives//html/Amps/2001-02/msg00040.html (8,840 bytes)
366. [AMPS] 80/40 antenna back up (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 1 Feb 2001 19:14:11 -0500; The same thing crossed my mind Chuck. People often think because there is no ground connection there is no ground loss, but any antenna that close to earth would have a lot of loss if there isn't so; /archives//html/Amps/2001-02/msg00043.html (8,080 bytes)
367. [AMPS] L4 used 3-400Zs,had no ALC knob es watt meter (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 2 Feb 2001 05:32:39 -0500; My neighbor had an L4 he sold to me that had 3-400Z's and black sockets and non-glass chimneys. Long gone now. 73, Tom W8JI w8ji@contesting.com -- FAQ on WWW: http://www.contesting.com/FAQ/amps Subm; /archives//html/Amps/2001-02/msg00054.html (7,362 bytes)
368. [AMPS] Amperex 3-500ZG not cheap in EU (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 2 Feb 2001 12:11:47 -0500; You are way behind the times Phil. That suit was initially brought in the 80's, and was put on the back burner by Regan and company. Look to the Republicans for this one, as well as the failure to c; /archives//html/Amps/2001-02/msg00063.html (7,753 bytes)
369. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 6 Feb 2001 08:58:02 -0500; Hi Peter, My "spam" filter made me miss most of this, but I should add a few comments. Of course Rich always leaves a few things out. 1.) There would have to be some reasonable assurance lack of a rh; /archives//html/Amps/2001-02/msg00129.html (14,890 bytes)
370. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 6 Feb 2001 09:39:46 -0500; Not really, a suitable current limiting transformer costs LESS than a transformer that allows excessive starting current. You do have to allow for temperature rise, however, and not box it in. Oh su; /archives//html/Amps/2001-02/msg00132.html (10,115 bytes)
371. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 6 Feb 2001 20:27:52 -0500; Put all those tubes laying around that are perfectly good except for low emission in one pile. Put all the tubes with internal defects like broken welds, leaking seals, open filaments, grids touchin; /archives//html/Amps/2001-02/msg00165.html (10,199 bytes)
372. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 9 Feb 2001 11:21:48 -0500; Then you have to add in cost of additional failures and problems caused by adding that rheostat, compared to what it might possibly help. And don't forget the internal metering (since you could NEVER; /archives//html/Amps/2001-02/msg00197.html (9,360 bytes)
373. [AMPS] amps (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 9 Feb 2001 19:55:52 -0500; Hi carl These switches are called the wrong names all the time. A "shorting switch" picks up the next contact before releasing the one it was just on. It has less contact-to-contact holdoff voltage,; /archives//html/Amps/2001-02/msg00206.html (8,653 bytes)
374. [AMPS] switches (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 9 Feb 2001 21:59:20 -0500; Hi Carl, them!! If you get a switch catalog you'll see the types explained. Even the Mouser catalog calls switches by the correct descriptions. If you order a "shorting switch" you get a simple one c; /archives//html/Amps/2001-02/msg00209.html (9,296 bytes)
375. [AMPS] switches (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sat, 10 Feb 2001 08:39:38 -0500; The side you short on makes no difference at all. Current in the coil is essentially equal all through the coil, as long as the coil is not so large it acts like a transmission line or antenna or th; /archives//html/Amps/2001-02/msg00216.html (9,704 bytes)
376. [AMPS] 6146 splatter help? (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 1 Jan 2001 17:39:51 -0500; Load it heavy enough, and make sure the bias is set properly. Watch the audio gain. The ALC is too slow on attack. Over-tuning (load control open a bit further than normal) helps, as does keeping ju; /archives//html/Amps/2001-01/msg00022.html (8,375 bytes)
377. [AMPS] 6146 splatter help? (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 2 Jan 2001 05:48:29 -0500; What selectivity are you using on the IFR? What sampling or scan rate? Does the IFR have peak storage? If so how many sweeps is it making in a sample and how fast are they? 73, Tom W8JI w8ji@contest; /archives//html/Amps/2001-01/msg00034.html (8,066 bytes)
378. [AMPS] 6146 splatter help? IFR overload (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 2 Jan 2001 22:48:36 -0500; Hi Jim, Then you can not possibly measure splatter with that unit, unless you are interested in splatter 60 kHz or more away. To paint a picture of the signal it must have a selectivity much less tha; /archives//html/Amps/2001-01/msg00082.html (8,494 bytes)
379. [AMPS] 6146 splatter help? IFR overload (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 3 Jan 2001 06:38:31 -0500; Hi Jim, Not when the analyzer is sweeping and the spatter is off and on, and the peak energy is not stored. in the display system so the highest peaks are display even if they appear while the analyz; /archives//html/Amps/2001-01/msg00091.html (9,832 bytes)
380. [AMPS] Alpha (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 3 Jan 2001 12:35:47 -0500; Hi Mike, If the SB-220 did suffer damage, it would have been from operating frequency voltages. If a VHF parasitic would ever NOT be bypassed very well right at the input of the the tank, the amplifi; /archives//html/Amps/2001-01/msg00098.html (8,996 bytes)

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