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1. Re: [Amps] MFJ and Dahl (score: 1)
Author: "Ward Silver" <hwardsil@gmail.com>
Date: Sun, 9 Dec 2007 11:12:21 -0800
N9AA is exactly right. MFJ makes what hams need at prices they can pay. There are often very good reasons that the companies MFJ buys are available for sale. I agree with the observation that the equ
/archives//html/Amps/2007-12/msg00108.html (8,338 bytes)

2. Re: [Amps] High voltage rectifiers for Henry 3K (score: 1)
Author: "Ward Silver" <hwardsil@gmail.com>
Date: Mon, 24 Dec 2007 19:36:11 -0800
And while you guys were busy arguing about whose iron is the purer, your girlfriends left with the guy that had a cool looking pickup truck and a friendly dog :-) Merry Christmas, Ampmeisters everyw
/archives//html/Amps/2007-12/msg00243.html (9,009 bytes)

3. Re: [Amps] grounding grids (score: 1)
Author: "Ward Silver" <hwardsil@gmail.com>
Date: Thu, 30 Jul 2009 15:48:11 -0700
What?! And ruin a perfectly good thread? 73, Ward N0AX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2009-07/msg00414.html (8,044 bytes)

4. Re: [Amps] WD-40 Is Not.... (score: 1)
Author: "Ward Silver" <hwardsil@gmail.com>
Date: Mon, 1 Mar 2010 17:13:47 -0800
Freeze Mist works great on wasps and hornets, too - but you have to aim carefully. Makes it a little more sporting. Solidifies 'em right up! You can almost hear them thinking, "What the...???...[tink
/archives//html/Amps/2010-03/msg00035.html (8,309 bytes)

5. [Amps] Anyone Heard from Manfred? (score: 1)
Author: "Ward Silver" <hwardsil@gmail.com>
Date: Tue, 2 Mar 2010 16:23:13 -0800
Manfred Mornhinweg XQ2FOD is a frequent and valued contributor here but has not posted in several days. His QTH is Temuco, south of the quake epicenter by 100 miles or so. His Web page is loading OK,
/archives//html/Amps/2010-03/msg00051.html (6,792 bytes)

6. [Amps] Manfred's OK (score: 1)
Author: "Ward Silver" <hwardsil@gmail.com>
Date: Thu, 4 Mar 2010 12:38:34 -0800
He is a busy man at the moment, but is apparently OK. Obviously, there was some damage at home, as well. He sent a note with a link to photos on his Web site: http://www.ludens.cl/earthquake/earthqua
/archives//html/Amps/2010-03/msg00075.html (7,155 bytes)

7. Re: [Amps] liquid cooling (score: 1)
Author: "Ward Silver" <hwardsil@gmail.com>
Date: Mon, 5 Apr 2010 18:05:31 -0500
Dick K4XU demonstrated a solid-state module that was water cooled. He hooked up an electrically controlled sprinkler system valve to the amp keying line and whenever he was transmitting, a stream of
/archives//html/Amps/2010-04/msg00135.html (8,316 bytes)

8. Re: [Amps] Heathkit Copyright (score: 1)
Author: "Ward Silver" <hwardsil@gmail.com>
Date: Thu, 20 May 2010 08:40:12 -0500
No way! This is the INTERNET, where every discussion spawns all possible linear and non-linear combinations of the original subject. Differentiable everywhere, continuous nowhere. 73, Ward N0AX ____
/archives//html/Amps/2010-05/msg00218.html (7,941 bytes)

9. [Amps] Shielding Effectiveness (score: 1)
Author: "Ward Silver" <hwardsil@gmail.com>
Date: Wed, 6 Oct 2010 10:13:59 -0500
Per Ott's "Electromagnetic Compatibility Engineering", section 6.10 - shielding effectiveness in dB is: S = 20 log (wavelength / 2xL) where L is the maximum linear dimension of the aperture. If you h
/archives//html/Amps/2010-10/msg00053.html (7,442 bytes)

10. Re: [Amps] construct ferrite "line isolator" (score: 1)
Author: "Ward Silver" <hwardsil@gmail.com>
Date: Wed, 27 Oct 2010 07:54:49 -0500
Part of the problem is that what is "good" for use in an energy storage or transfer device (an inductor or transformer) is not the same as "good" for use in an RF suppression device. If you are buil
/archives//html/Amps/2010-10/msg00407.html (9,820 bytes)

11. [Amps] A Small Building Project (score: 1)
Author: "Ward Silver" <hwardsil@gmail.com>
Date: Wed, 6 Apr 2011 12:01:11 -0500
Challenging an RF engineer to build something hard often produces amazing results. 15 kW from 100w input. 73, Ward N0AX _______________________________________________ Amps mailing list Amps@contesti
/archives//html/Amps/2011-04/msg00243.html (7,090 bytes)

12. Re: [Amps] Cell phones, digital cameras and RF (score: 1)
Author: "Ward Silver" <hwardsil@gmail.com>
Date: Mon, 5 Mar 2012 14:15:23 -0600
Another reason for reduced susceptibility by handheld devices like phones to RF in general is the electronics are so highly integrated that what used to take inches of traces between multiple chips
/archives//html/Amps/2012-03/msg00058.html (8,739 bytes)

13. Re: [Amps] Fwd: Re: soldering vs crimping (score: 1)
Author: "Ward Silver" <hwardsil@gmail.com>
Date: Thu, 3 May 2012 20:36:44 -0500
You had a razor blade? We had to gnaw off the jacket and then bite through the individual strands one-by-one! Then we had to rub the solder with a stick until it melted! 73, Ward N0AX ______________
/archives//html/Amps/2012-05/msg00145.html (7,437 bytes)

14. Re: [Amps] SB-220 reliability and tuning (score: 1)
Author: "Ward Silver" <hwardsil@gmail.com>
Date: Tue, 11 Sep 2012 10:22:56 -0500
The importance of quick band changes reminds me of the old joke... Q: What's the difference between a contester and a DXer? A: A DXer has to light his pipe after every QSO. 73, Ward N0AX ___________
/archives//html/Amps/2012-09/msg00216.html (7,467 bytes)

15. Re: [Amps] FW: Power factor correction on tube amps (score: 1)
Author: Ward Silver <hwardsil@gmail.com>
Date: Sun, 10 Mar 2013 11:01:24 -0500
Having worked on the design, development, verification, and validation of life-critical medical devices (cardiac defibrillators), I can categorically state that process matters. A lot. ISO-9xxx is no
/archives//html/Amps/2013-03/msg00144.html (9,654 bytes)

16. Re: [Amps] FW: Power factor correction on tube amps (score: 1)
Author: Ward Silver <hwardsil@gmail.com>
Date: Sun, 10 Mar 2013 15:23:12 -0500
Any manufacturer who does not think there is already a paper trail for lawyers will get an expensive lesson, sooner or later. In this hyper-accountable world, process is often over-applied and over-r
/archives//html/Amps/2013-03/msg00150.html (11,592 bytes)

17. Re: [Amps] Building an Amp 101 (score: 1)
Author: Ward Silver <hwardsil@gmail.com>
Date: Fri, 17 Jan 2014 10:33:35 -0600
A good source of excellent cabinets is surplus or junked lab instruments. Not necessarily electronic instruments - chemistry, medical, or any large instrument enclosure will do the job. These are mad
/archives//html/Amps/2014-01/msg00098.html (8,597 bytes)

18. Re: [Amps] I'm not kidding: TL922 (score: 1)
Author: Ward Silver <hwardsil@gmail.com>
Date: Fri, 06 Feb 2015 08:55:53 -0600
Before you fix the amp...be sure to put a video on YouTube for posterity :-) 73, Ward N0AX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contestin
/archives//html/Amps/2015-02/msg00075.html (8,034 bytes)

19. Re: [Amps] Decline of homebrewing? (score: 1)
Author: Ward Silver <hwardsil@gmail.com>
Date: Sat, 7 Jan 2017 10:14:47 -0600
Hear, hear! And another good piece of advice is to make sure you have an ac safety ground connection on every metal enclosure. With 12 Vdc being the normal power supply voltage these days, we can ge
/archives//html/Amps/2017-01/msg00149.html (8,866 bytes)

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