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Total 53 documents matching your query.

21. Re: [Amps] Dummy Load Blues (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Thu, 14 Jun 2012 17:25:49 -0700 (PDT)
Hi Jerry, I wouldn't use mineral oil in a HP dummy load. The Cantenna has limited capacity. Using mineral oil will further reduce it. Actual transformer oil is as close as your power utility's transf
/archives//html/Amps/2012-06/msg00120.html (11,096 bytes)

22. Re: [Amps] Dummy Load Blues (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Fri, 15 Jun 2012 20:39:02 -0700 (PDT)
There's an echo in this thread. I stated that a few days ago. I would not use any kind of mineral oil because it won't cool as well as xfmr oil. For a DL like the Cantenna, if you intend to use it w
/archives//html/Amps/2012-06/msg00189.html (10,055 bytes)

23. Re: [Amps] Dummy Load Blues (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Fri, 15 Jun 2012 20:49:27 -0700 (PDT)
The cost of my homebrew 1600W (continuous) dummy load was zero. It was made from scrapped parts from my employer at that time. It was based on four 50 ohm 400W flange-mount RF resistors in series-par
/archives//html/Amps/2012-06/msg00190.html (9,270 bytes)

24. Re: [Amps] Dummy Load Blues (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Fri, 15 Jun 2012 21:55:04 -0700 (PDT)
My actual experience was QUITE the opposite. They were most accommodating. This was very recently, in the past year or two. If they're reluctant to give out the name & contact information of the supe
/archives//html/Amps/2012-06/msg00195.html (8,756 bytes)

25. Re: [Amps] Oscilloscope Purchase (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Tue, 26 Jun 2012 22:44:09 -0700 (PDT)
I'm very happy with my Tektronix 2236 (100 MHz) and 2465B (400 MHz). The 2465B came to me dead but at the right price: free. Dan Shores of Tek Scope Service (http://www.tekscopeservice.com/) in Portl
/archives//html/Amps/2012-06/msg00418.html (8,457 bytes)

26. Re: [Amps] Great Transformer Discussion! (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Mon, 22 Oct 2012 19:16:53 -0700 (PDT)
The interview is more like 9:30 (not 7:00) into the clip.  To save others the tedium, the interviewee is Peter Eggimann (KJ4MDY), who owns/runs Electronic Products Design, Inc in Wendell, NC: http://
/archives//html/Amps/2012-10/msg00120.html (8,590 bytes)

27. Re: [Amps] Microwave Oven Power Transformer (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Mon, 19 Nov 2012 13:18:53 -0800 (PST)
I agree about MOTs. It didn't take me long to decide that, for a big amplifier, they're just not worth the bother. My home-rewound plate xfmr has multiple taps on both primary windings and the second
/archives//html/Amps/2012-11/msg00140.html (11,946 bytes)

28. Re: [Amps] Replacement fan for a SB 220 (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Tue, 27 Nov 2012 16:23:11 -0800 (PST)
That is Dayton pn 4M070. Grainger sells it for $22.47. Reuse your old fan blade, or spend twice the money to get the blade and then have to balance it. vy 73, Bryan WA7PRC ___________________________
/archives//html/Amps/2012-11/msg00183.html (8,264 bytes)

29. Re: [Amps] Heathkit SB-1000 Arcing (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Tue, 27 Nov 2012 16:29:25 -0800 (PST)
Tom, No. If you're not comfortable working on it, it's time to find someone local to you to work on it. vy 73, Bryan WA7PRC _______________________________________________ Amps mailing list Amps@con
/archives//html/Amps/2012-11/msg00184.html (8,131 bytes)

30. Re: [Amps] Vacuum Relay (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Sun, 9 Dec 2012 14:02:14 -0800 (PST)
That's unfortunate. A scope isn't going to tell all but it tells a lot about a signal. They're not difficult to use and don't have to cost a lot. The vertical amplifier needs to respond at least twi
/archives//html/Amps/2012-12/msg00045.html (7,940 bytes)

31. Re: [Amps] Vacuum Relay (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Wed, 12 Dec 2012 22:45:45 -0800 (PST)
Hi Paul, I knew that. If you read what I wrote days ago, I was not writing about relay timing. I was writing about using a scope as a waveform monitor during normal on-air operating. So far, I've not
/archives//html/Amps/2012-12/msg00067.html (12,389 bytes)

32. Re: [Amps] Vacuum Relay (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Sat, 15 Dec 2012 10:55:48 -0800 (PST)
  I used Rich Measures QSK system in a SB-220 and it worked just perfectly. I never once regretted putting that in there and it was definitely worth making. Gary KA1J That's not the setup I'll be usi
/archives//html/Amps/2012-12/msg00089.html (8,925 bytes)

33. Re: [Amps] Vacuum Relay (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Sat, 15 Dec 2012 11:22:50 -0800 (PST)
It doesn't take long to find some incredibly good buys on used Tektronix scopes -- and at a price about half of the popular high-end wattmeters. Folks have no problem paying $600 for a wattmeter with
/archives//html/Amps/2012-12/msg00090.html (9,774 bytes)

34. Re: [Amps] Panel lettering (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Wed, 2 Jan 2013 16:48:01 -0800 (PST)
Labels tend to look like labels, no matter how hard you try.   For dry-transfer "rub on" lettering, look for drafting, graphics, or hobby suppliers. The last time I bought any, I found it in the draf
/archives//html/Amps/2013-01/msg00021.html (10,708 bytes)

35. Re: [Amps] Ameritron band switch repair (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Thu, 7 Feb 2013 13:32:27 -0800 (PST)
The current D550 is rated 260W/200W.  If that's not enough, you can step up to the D650, which is rated 300W/200W. The D650 uses a 3 wire cord, with the tip grounded (for those ESD-sensitive toobs).
/archives//html/Amps/2013-02/msg00061.html (8,795 bytes)

36. Re: [Amps] email for Pat Bacon, W7UA (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Tue, 19 Mar 2013 19:52:51 -0700 (PDT)
Hi Lon, The email address I have for Pat is "pbcc@att.net". Also, I sometimes catch him on/around 3730 KHz in the evenings. vy 73, Bryan WA7PRC _______________________________________________ Amps ma
/archives//html/Amps/2013-03/msg00265.html (7,285 bytes)

37. Re: [Amps] What is max grid current for YC-156 ?? (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Sun, 24 Mar 2013 09:11:54 -0700 (PDT)
Jim, Refer to the YC-156 datasheet here: http://www.g8wrb.org/data/Eimac/YC156.pdf vy 73, Bryan WA7PRC [snip] _______________________________________________ Amps mailing list Amps@contesting.com htt
/archives//html/Amps/2013-03/msg00322.html (7,540 bytes)

38. Re: [Amps] For sale: 8877 Robust HF Amplifier or parts (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Sat, 4 May 2013 13:35:27 -0700 (PDT)
That sounds similar to my 160m amplifier project except, I rewound my plate transformer and I'll be using a GS35b. The HV PS metal arrived the other day; it's time to get busy putting that together.
/archives//html/Amps/2013-05/msg00082.html (8,224 bytes)

39. Re: [Amps] chassis maker? (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Sat, 4 May 2013 13:40:13 -0700 (PDT)
Ditto. I found metalwork to be not all that tough. With hand tools, it just takes more time. I started bending sheet after I fabricated a small (24") leaf brake. Still, prices shown by shops mentione
/archives//html/Amps/2013-05/msg00083.html (9,145 bytes)

40. [Amps] WTB: SHV Plugs (score: 1)
Author: Bryan Swadener <bswadener@yahoo.com>
Date: Sat, 25 May 2013 16:51:18 -0700 (PDT)
I'm looking for some /reasonably-priced/ SHV plugs to fit Trompeter TRC-50-2 cable (6KV/20ga triaxial). Four pieces would be great. Does anyone have straight or right-angle plugs for sale, or know wh
/archives//html/Amps/2013-05/msg00182.html (6,463 bytes)

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