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References: [ +from:KeepWalking188@ac0c.com: 63 ]

Total 63 documents matching your query.

41. Re: [Amps] DIGITAL BARGRAPH DISPLAYS (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Wed, 13 Feb 2019 13:05:31 -0600
Steve, Whatever you need, this company has one... https://www.ebay.com/sch/ledbargraph/m.html?_nkw=&_armrs=1&_ipg=&_from= If you want to go old school, the common chip to base it on is LM3914. 73/jef
/archives//html/Amps/2019-02/msg00039.html (8,466 bytes)

42. Re: [Amps] RG-213 Hi pot ? (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Mon, 13 May 2019 22:07:41 -0500
I've hipotted a lot of 213.  Never seen any leakage at 15KV DC which is the max on my.  If you put 259 on them, the BDV is around 4500 V though. The weak spot on this sort of cable is not the cable i
/archives//html/Amps/2019-05/msg00050.html (11,501 bytes)

43. Re: [Amps] 3cx800a7 chimeny (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Tue, 18 Jun 2019 15:56:57 -0500
Check at the local speed shop.  Silicone tubing used to join turbos to engines comes in several colors, diameters and sells for about $20/foot.  Won't melt and is insulative. 73/jeff/ac0c alpha-charl
/archives//html/Amps/2019-06/msg00049.html (7,811 bytes)

44. Re: [Amps] HV Fuse (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Sat, 21 Sep 2019 12:16:38 -0500
I did the same thing as Rob, but put a length of 1/2" pyrex tube between the two.  When the fuse goes, that pyrex tube contains the arc. 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com Carl I al
/archives//html/Amps/2019-09/msg00056.html (9,111 bytes)

45. Re: [Amps] Tips For Winding a Plate Choke (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Thu, 10 Oct 2019 21:43:19 -0500
This is a project that can be a great lesson learning opportunity.  After all, how hard can it be?   Ha ha. 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com <A simpler alternative is to switch an
/archives//html/Amps/2019-10/msg00051.html (12,121 bytes)

46. Re: [Amps] What limits DC plate supply voltage for GI7B? (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Fri, 25 Oct 2019 10:27:32 -0500
I ran a pair at about 3KV for a long time.  Once you get beyond about 2400V, the risk of a glitch goes up.  The transformer had a variety of secondary taps and I could dial it in pretty close. Tube i
/archives//html/Amps/2019-10/msg00071.html (9,481 bytes)

47. Re: [Amps] What limits DC plate supply voltage for GI7B? (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Fri, 25 Oct 2019 13:45:04 -0500
Hipot is good for a relative indication but not an absolute one. As the tube gets hot the BDV can change and the tube can glitch. Also the GI7BT is easier to cool than the GI7B due to the different c
/archives//html/Amps/2019-10/msg00074.html (8,795 bytes)

48. Re: [Amps] KPA1500 Group? (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Fri, 25 Oct 2019 15:34:14 -0500
The amp is covered on the two Elecraft boards. 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com Dave NR1DX _______________________________________________ Amps mailing list Amps@contesting.com ht
/archives//html/Amps/2019-10/msg00078.html (6,763 bytes)

49. Re: [Amps] GS35B Amps Common Problem / few more comments (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Thu, 7 Nov 2019 09:01:52 +0900
The grid on the 3000 is indestructible where the 8877 needs good protection.  On the other hand, the output C of the '3000 is quite a bit higher than the 8877 (about 25 pf vs 10 pf) and for a guy coo
/archives//html/Amps/2019-11/msg00048.html (11,952 bytes)

50. Re: [Amps] Amp causing RFI Update (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Tue, 4 Feb 2020 13:18:26 -0600
Gary, good job there. I find your black magic comment on the mark.  My shack is built with all the correct station engineering principles.  Antennas are nearly 300 feet out.  Single point ground into
/archives//html/Amps/2020-02/msg00017.html (10,032 bytes)

51. Re: [Amps] Amp causing RFI (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Tue, 4 Feb 2020 15:31:36 -0600
Single Point Ground 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com Great advice on purchasing the ARRL Grounding and Bonding book. W8JI addresses the shack ground rod https://www.w8ji.com/stati
/archives//html/Amps/2020-02/msg00023.html (9,060 bytes)

52. Re: [Amps] W8ZR Autotune Amplifier Progress Report (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Fri, 25 Dec 2020 16:55:13 -0600
I have an 86 in one of my tube amps.  A dual section type. Pulled out the detent and use a type 23 direct drive.  Works great; way way more torque than needed. The bigger issue (at least in my thinki
/archives//html/Amps/2020-12/msg00065.html (17,970 bytes)

53. Re: [Amps] W8ZR Autotune Amplifier Progress Report (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Fri, 25 Dec 2020 16:57:49 -0600
CORRECTION to my spelling mistakes below. 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com The bigger issue (at least in my thinking) is the method you use to determine the switch position.   I u
/archives//html/Amps/2020-12/msg00066.html (18,913 bytes)

54. Re: [Amps] SB-200 Mods (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Wed, 27 Jan 2021 22:07:11 -0600
I spent a bit of time on that amp a while back.  Involved a GI7B conversion but warc operation was part of the goal.  I forget which warc band it was that the plate choke is self resonant close too,
/archives//html/Amps/2021-01/msg00026.html (9,322 bytes)

55. Re: [Amps] Clipperton L - GI-7B (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Fri, 12 Feb 2021 19:55:05 -0600
Maybe for SSB.  Just fine for CW & RTTY. 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com 73 Peter, DJ7WW Apparently the measured IP3 was -26dB relative to either one of two tones which correspon
/archives//html/Amps/2021-02/msg00007.html (7,885 bytes)

56. Re: [Amps] FT8 power with the KPA1500 (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Sat, 10 Jul 2021 12:03:50 -0500
I don't know about 100% ICAS.  But I can say from personal experience, the KPA1500 is able to withstand years of RTTY contest duty without a problem, other than a lot of fan noise when it really gets
/archives//html/Amps/2021-07/msg00039.html (9,933 bytes)

57. Re: [Amps] 572B/T160L tube class C (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Thu, 19 Aug 2021 21:33:09 -0500
How much service do you expect from a new set of tubes?  It's one thing to know "it can do it, if I want" - but then not actually need the capability.  It's another thing if you are saying "I want to
/archives//html/Amps/2021-08/msg00043.html (11,116 bytes)

58. Re: [Amps] 6M CW (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Sun, 23 Oct 2022 21:21:00 -0500
I like that idea... 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com While the FT modes have made it sooo much easier for people even with modest ststions to make contacts. Thing is even when the
/archives//html/Amps/2022-10/msg00052.html (9,512 bytes)

59. Re: [Amps] Amp Pricing(??) (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Tue, 6 Dec 2022 11:55:26 -0600
The AL80B is solid and uses the 3-500Z which will last forever properly cared for. 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com Sent from the all new AOL app for iOS Hello everyone. I'll just
/archives//html/Amps/2022-12/msg00009.html (8,378 bytes)

60. Re: [Amps] L-PI amp network (score: 1)
Author: Jeff Blaine <KeepWalking188@ac0c.com>
Date: Tue, 13 Dec 2022 23:33:50 -0600
I bet you won't need much series L.  The Cout in GG of the 8877 is only 10pf. 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com One of my big questions was if I could use GM3SEK's spreadsheet calc
/archives//html/Amps/2022-12/msg00057.html (14,167 bytes)

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