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41. Re: [Amps] SB-221 Problem - Slow on the uptake (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Thu, 18 Feb 2010 20:22:15 -0800
What is the input SWR? What does the exciter show it is? Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/am
/archives//html/Amps/2010-02/msg00545.html (10,182 bytes)

42. Re: [Amps] 120 cycle hum from Henry 2K-4 (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Thu, 18 Feb 2010 20:37:40 -0800
The 8' ground rod did absolutely nothing. But the bonding of the equipment together did. 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists
/archives//html/Amps/2010-02/msg00547.html (16,274 bytes)

43. Re: [Amps] 120 cps Hum to CT Transformer (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Sun, 21 Feb 2010 13:53:44 -0800
CG 308 and 309 are wonderful transformers. I used a CG308 in a home brew 8877. I used it on RTTY contests at 1500 watts out. Got barely warm. I had a CG-309 that I sold to someone a long time ago. No
/archives//html/Amps/2010-02/msg00618.html (9,168 bytes)

44. Re: [Amps] 120 cps Hum to CT Transformer (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Sun, 21 Feb 2010 14:24:54 -0800
I used it in a full wave center tap configuration. Center tap for - (or ground) and 2 strings of diodes. Anode of each string to each side of center tap (AC), and cathodes connected together for the
/archives//html/Amps/2010-02/msg00621.html (9,175 bytes)

45. Re: [Amps] hotswitching 30s1 (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Sun, 21 Feb 2010 20:37:06 -0800
There is no reason to speed up a vacuum relay. 1.8 mS is more than enough time. Please see: http://home.earthlink.net/~wd7s/updates.htm 73 Jim W7RY _______________________________________________ Amp
/archives//html/Amps/2010-02/msg00634.html (10,125 bytes)

46. Re: [Amps] Unknown amp (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Mon, 22 Feb 2010 14:11:26 -0800
It's. A uhf Motorola amp 2x 4cx250. 450-470 MHz. It could be 1/4 or 1/2 wave depending on frequency and the tubes internal and circuits distributed C. Most 144 and 220 amps were 1/4. On 432 they went
/archives//html/Amps/2010-02/msg00661.html (7,818 bytes)

47. Re: [Amps] Henry 5K (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Thu, 25 Feb 2010 07:51:00 -0800
Legal limit which is 1500 watts PEP. 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2010-02/msg00741.html (7,656 bytes)

48. Re: [Amps] WD-40, snaked, vermin and puddytats (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Sun, 7 Mar 2010 08:08:38 -0800
Am I the only one that has issues with this thread? Are we done yet? Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman
/archives//html/Amps/2010-03/msg00118.html (10,411 bytes)

49. [Amps] WD7S Display Board For Sale (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Thu, 11 Mar 2010 21:00:24 -0800
I have a complete working display DS1 and board by WD7S for sale. Please see: http://home.earthlink.net/~wd7s/ds-1.htm I also have the power supply http://home.earthlink.net/~wd7s/ds-1.htm Both are c
/archives//html/Amps/2010-03/msg00177.html (6,867 bytes)

50. [Amps] MRF-140 Matched Pair Required? (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Sat, 13 Mar 2010 11:21:42 -0800
I have an Icom IC-775 with MRF-140 finals. And JUST ONE of them is bad. There are seperate bias controls on each one. Should I replace both of them? Anyone have one or two they want to sell? Used is
/archives//html/Amps/2010-03/msg00204.html (6,726 bytes)

51. Re: [Amps] GI7B Question - Input Matching (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Sun, 14 Mar 2010 17:52:35 -0700
You need the flywheel effect that a C-L-C tank circuit can provide. A broad band transformer is not the answer. This was just discussed here at length not long ago. 73 Jim W7RY ______________________
/archives//html/Amps/2010-03/msg00264.html (9,108 bytes)

52. Re: [Amps] Are exciter RF delays to prevent hot keying cataloged anywhere? (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Wed, 17 Mar 2010 21:39:32 -0700
The 751A is about 10 ms and it's adjustable with an internal pot. It's alignment is detailed in the service manual. 73 Jim W7RY _______________________________________________ Amps mailing list Amps@
/archives//html/Amps/2010-03/msg00360.html (8,230 bytes)

53. Re: [Amps] Matching GU-74Bs (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Mon, 22 Mar 2010 17:58:23 -0700
73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2010-03/msg00476.html (6,748 bytes)

54. Re: [Amps] 2A slo blow in step start (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Tue, 23 Mar 2010 21:00:08 -0700
I too have replaced a defective transformer in a 1KD5. I don't remember if it was the primary or secondary. Either way, it went bad. It was an ECA. 73 Jim W7RY _______________________________________
/archives//html/Amps/2010-03/msg00528.html (11,208 bytes)

55. Re: [Amps] Good Engineering. (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Wed, 24 Mar 2010 13:28:16 -0700
Well put Dave! 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2010-03/msg00574.html (7,782 bytes)

56. Re: [Amps] 'Good engineering' (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Thu, 25 Mar 2010 07:30:45 -0700
I'm sure glad I have a delete key. And a spam box. Oh... And by the way Jim (VE7RF).... The legal, moral, fair, and gentlemanly allowable power output here in the US is 1500 watts. 73 Jim W7RY ______
/archives//html/Amps/2010-03/msg00612.html (8,747 bytes)

57. Re: [Amps] Good Engineering. (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Thu, 25 Mar 2010 07:33:55 -0700
Sorry... Bill! Well put Bill W6WRT!! _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2010-03/msg00613.html (7,588 bytes)

58. Re: [Amps] 'good engineering' (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Sat, 27 Mar 2010 08:10:41 -0700
Oh please... Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2010-03/msg00687.html (15,005 bytes)

59. Re: [Amps] 'good engineering' (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Sun, 28 Mar 2010 19:53:30 -0700
If you want to run a 562 (7.5 volts @75 amps) watt filament in your shack.... That's your prerogative.... 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting
/archives//html/Amps/2010-03/msg00735.html (10,195 bytes)

60. Re: [Amps] 'good engineering' (score: 1)
Author: James Colville <jimw7ry@gmail.com>
Date: Sun, 28 Mar 2010 19:59:20 -0700
I forgot to mention the 3000 watts of zero signal anode current if you run it at 4000 volts. A little less if you run it at 5000 volts... Then there is just 2500 watts of ZSAC... Is this sounding lik
/archives//html/Amps/2010-03/msg00736.html (11,092 bytes)

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