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21. Re: [Amps] WARNING! W4RT (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Thu, 14 Apr 2011 10:55:33 -0400
Apparently you have a reading comprehension problem. I didn't say I bought it on eBay. Roger _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contest
/archives//html/Amps/2011-04/msg00413.html (7,145 bytes)

22. Re: [Amps] WARNING! W4RT (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Thu, 14 Apr 2011 11:46:29 -0400
I think it's entirely appropriate to give a heads up to others who might be contemplating the purchase of a tuner to use on the input of a homebrew amp. Apparently, the W4RT folks don't realize that
/archives//html/Amps/2011-04/msg00418.html (8,722 bytes)

23. Re: [Amps] Input SWR revisited (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Tue, 13 Jan 2015 14:27:16 -0500
The VNA does not measure the VSWR on the line. It measures VSWR at the input to the VNA unless you do a cal at the load end of the line to remove it's effect. 73, Roger On 1/13/2015 8:47 AM, Paul Chr
/archives//html/Amps/2015-01/msg00094.html (8,493 bytes)

24. Re: [Amps] Input SWR revisited (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Wed, 14 Jan 2015 16:18:00 -0500
I think we're getting a couple of things confused here. The SWR on a transmission line and the impedance along the line. In Don's example, we have a 100 Ohm load fed thru a piece of 75 Ohm line. The
/archives//html/Amps/2015-01/msg00112.html (12,239 bytes)

25. Re: [Amps] Input SWR revisited (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Wed, 14 Jan 2015 18:29:56 -0500
I think this guy just wants to argue, Gerry. 73, Roger _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2015-01/msg00120.html (8,023 bytes)

26. Re: [Amps] Amps with high swr question (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Thu, 15 Jan 2015 12:53:54 -0500
Impedance matching is only one of the functions a tuned input circuit on the input of a GG linear amplifier performs. The other is the "flywheel effect" that smooths out impedance variations that occ
/archives//html/Amps/2015-01/msg00131.html (11,362 bytes)

27. Re: [Amps] 5 Minutes for Ameritron 811H to warm up? (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Fri, 23 Jan 2015 08:09:11 -0500
What was breaking down? The 811 is a good tube but most hams believe the mfrs claims and run them way beyond their ratings. 73, Roger If you buy a AL811, you deserve what you get. A guy local to me h
/archives//html/Amps/2015-01/msg00213.html (9,955 bytes)

28. Re: [Amps] amp reading (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Fri, 23 Jan 2015 20:23:58 -0500
Small gauge teflon insulated wire. 73, Roger One of the things I wonder about is how you add a resistor to the filament lead since it seems it is going to have to be about 0.2/0.4 ohms or so at high
/archives//html/Amps/2015-01/msg00225.html (7,936 bytes)

29. [Amps] AL-1200 schematic (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Sun, 12 Apr 2015 09:51:01 -0400
Hi Paul... The redrawn schematic is the work of John, K6AM. 73, Roger _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinf
/archives//html/Amps/2015-04/msg00082.html (7,686 bytes)

30. [Amps] AL-1200 schematic (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Sun, 12 Apr 2015 17:11:17 -0400
The redrawn schematic is available here: K6AM AL-1200 Schematic - PJ2T <http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CB8QFjAA&url=http%3A%2F%2Fwww.pj2t.org%2Fccc%2FAL-1200.sche
/archives//html/Amps/2015-04/msg00087.html (8,488 bytes)

31. Re: [Amps] Unauthorized PayPal charges Beware (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Thu, 11 Jun 2015 09:09:19 -0400
Yes! I just was charged for an Angie's List subscription that I cancelled months ago. 73, Roger NY Times and others have somehow sent to PayPal my faked authorization to put the business on RE OCCURR
/archives//html/Amps/2015-06/msg00014.html (8,242 bytes)

32. Re: [Amps] Unauthorized PayPal charges Beware (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Thu, 11 Jun 2015 10:17:12 -0400
I think that any service that automatically pays bills should have a place to let them know if you had cancelled a service so that they don't keep paying. 73, Roger __________________________________
/archives//html/Amps/2015-06/msg00018.html (8,104 bytes)

33. Re: [Amps] Unauthorized PayPal charges Beware (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Thu, 11 Jun 2015 10:27:44 -0400
I just sent an email to PayPal about this. It will be interesting to see their reply. 73, Roger _______________________________________________ Amps mailing list Amps@contesting.com http://lists.cont
/archives//html/Amps/2015-06/msg00020.html (8,695 bytes)

34. Re: [Amps] Regulated filament current (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Fri, 04 Sep 2015 14:56:40 -0400
Inrush current is not the only consideration. Having a current regulated supply also compensates for filament choke resistance and any variations in socket contact resistance. Ensuring the proper fil
/archives//html/Amps/2015-09/msg00014.html (8,636 bytes)

35. [Amps] WOW! (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Sun, 27 Mar 2016 17:24:19 -0400
http://boston.craigslist.org/sob/ele/5510753570.html 73, Roger _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2016-03/msg00040.html (6,290 bytes)

36. Re: [Amps] SCR to adjust 240v to 200v (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Mon, 15 Aug 2016 15:25:27 -0400
Probably Japanese. Their standard mains voltage is 100 VAC. 73, Roger There is and was no European country with 200V mains. _______________________________________________ Amps mailing list Amps@cont
/archives//html/Amps/2016-08/msg00029.html (8,593 bytes)

37. Re: [Amps] Stock up on tubes? (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Mon, 05 Dec 2016 17:27:48 -0500
This is like swapping engines in a car. It sounds simple but is fraught with problems. 1. Input Z of 8877 is different requiring rebuilding of input circuits. 2. Power transformer will not handle inc
/archives//html/Amps/2016-12/msg00102.html (10,965 bytes)

38. Re: [Amps] Glow, gettering, and voltage (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Mon, 09 Jan 2017 12:19:14 -0500
Switching between CW and SSB voltages doesn't stress the switch much. Turning the amp on results in a large surge through the on/off switch. This can be minimized by starting the amp in the CW positi
/archives//html/Amps/2017-01/msg00198.html (9,799 bytes)

39. [Amps] Ameritron AL-1200 (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Sat, 25 Feb 2017 11:26:24 -0500
There is a hand-drawn input circuit change on the Ameritron website. It is undated and doesn't state which amp it applies to. Anyone have any info? 73, Roger _________________________________________
/archives//html/Amps/2017-02/msg00189.html (6,285 bytes)

40. [Amps] test (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Tue, 21 Mar 2017 10:01:27 -0400
test - ignore _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2017-03/msg00127.html (6,042 bytes)

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