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1. Re: [Amps] Stripline design (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Thu, 19 Nov 2009 21:18:47 -0500; Very true Roger! I suffered thru the early versions as well. The 2000 version was the first I really liked and it kept getting better. Good thinking. I understand the theory well enough and can handl; /archives//html/Amps/2009-11/msg00208.html (9,716 bytes)
2. Re: [Amps] Stripline design (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Thu, 19 Nov 2009 18:50:54 -0500; Or find someone with Microwave Office and plug in the numbers at let it do the math. Ive used that program for everything from VHF to millimeter wave before retiring. Having AutoCad to assist with th; /archives//html/Amps/2009-11/msg00205.html (12,425 bytes)
3. Re: [Amps] George Badger, W6TC (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Wed, 18 Nov 2009 16:08:24 -0500; Its been about 2 years Id guess since he emailed me a comment or wise crack about something on Amps! I loved his humor. That and the fact he was retired when he went to Svetlana, he just hated to be; /archives//html/Amps/2009-11/msg00201.html (9,097 bytes)
4. Re: [Amps] George Badger, W6TC (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Tue, 17 Nov 2009 21:42:39 -0500; I was just reading a 1961 QST that described Eimacs end of the first ham EME 2 way and George was part of that team. I was wondering if he was still around. In later years I talked to him many times; /archives//html/Amps/2009-11/msg00199.html (7,893 bytes)
5. Re: [Amps] Looking for Russian equivalents and sources for 3CX400A7 or8874 (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 16 Nov 2009 13:01:16 -0500; Its called the 8874 (-; A Svetlana product under whatever their current name is. Carl KM1H -- Original Message -- From: "Robert Groh" <rgroh@swbell.net> To: <amps@contesting.com> Cc: "Bob Peters" <rw; /archives//html/Amps/2009-11/msg00196.html (8,624 bytes)
6. Re: [Amps] Stripline design (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 16 Nov 2009 12:47:26 -0500; Put it on a web site Carl _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2009-11/msg00194.html (12,218 bytes)
7. Re: [Amps] Stripline design (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 16 Nov 2009 12:44:23 -0500; I based mine on the Eimac design which morphed into the W6PO. I used flappers and aluminum discs for tuning on 4CX250/8122 copper tubing amps in the past for 2M and never had perfect tuning stability; /archives//html/Amps/2009-11/msg00193.html (11,915 bytes)
8. Re: [Amps] Stripline design (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 16 Nov 2009 12:31:58 -0500; Shorted and open resonant stubs to reduce even and odd harmonics. Same concept used on multi multi HF contest stations. I use a whole mess of coax stubs here on my monoband antennas since a LPF has n; /archives//html/Amps/2009-11/msg00192.html (11,391 bytes)
9. Re: [Amps] Stripline design (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 16 Nov 2009 12:26:48 -0500; Its simply resonant lines, either quarter or half wave modified by the tubes output C. Its the length and width that seems to confuse many. That can be calculated or cut and try with a GDO. I use spl; /archives//html/Amps/2009-11/msg00191.html (13,261 bytes)
10. Re: [Amps] Stripline design (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sun, 15 Nov 2009 22:27:03 -0500; QST and HRM had some theory/construction articles mostly by Eimac engineers. Ive done some stripline myself but prefer a single 3CX1000A7 and 8877 which I use on 144 and 222. I remember a dual 4CX100; /archives//html/Amps/2009-11/msg00183.html (8,323 bytes)
11. [Amps] WTB: dial scale for Amp Supply products (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sun, 15 Nov 2009 13:44:08 -0500; I need one of the 0-100 scale that is mounted on the reduction drive of all the LK series of amps. Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http; /archives//html/Amps/2009-11/msg00179.html (6,338 bytes)
12. Re: [Amps] FW: B- questions (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Tue, 10 Nov 2009 21:50:52 -0500; Since Ameritron calls it a safety diode I thought it was obvious. I simply got bored with the thread and didnt bother replying.. Carl KM1H _______________________________________________ Amps mailing; /archives//html/Amps/2009-11/msg00169.html (10,163 bytes)
13. Re: [Amps] New/old SB-221 start up (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 9 Nov 2009 21:11:10 -0500; Do it with the voltage that matches the Variac and bring it up slowly to full voltage over some period of time. Are the electrolytics the originals and if so have they been reformed and leakage measu; /archives//html/Amps/2009-11/msg00155.html (10,620 bytes)
14. Re: [Amps] B- questions (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 9 Nov 2009 20:41:04 -0500; A reverse connected 1N4007 or any similar rectifier diode can be considered a zener also and they are used that way in amplifiers to set the operating bias. An off the shelf zener conducts at a much; /archives//html/Amps/2009-11/msg00151.html (12,869 bytes)
15. Re: [Amps] B- questions (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 9 Nov 2009 20:33:52 -0500; Ive no experience with those Jim, do you have a reference URL? Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/list; /archives//html/Amps/2009-11/msg00150.html (12,745 bytes)
16. Re: [Amps] B- questions (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 9 Nov 2009 10:57:46 -0500; I fail to see where you obtain a -3000V, perhaps its a terminology confusion. Even a grid driven amp can use the elevated B- and is nothing new used that way. In any circuit, come off the B- rail wit; /archives//html/Amps/2009-11/msg00139.html (11,029 bytes)
17. Re: [Amps] B- questions (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 9 Nov 2009 10:34:33 -0500; The term I learned in industry is reverse parallel. Anti parallel seems to be a ham invention and likely European in origin in line with anti clockwise (-; Carl KM1H _________________________________; /archives//html/Amps/2009-11/msg00138.html (9,349 bytes)
18. Re: [Amps] B- questions (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 9 Nov 2009 10:16:19 -0500; In amps that werent designed correctly in the first place it might work depending upon the speed to short. The better amps have a 3kV or higher coupling cap to keep HV from going to the xcvr. Even th; /archives//html/Amps/2009-11/msg00137.html (11,426 bytes)
19. Re: [Amps] B- questions (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sun, 8 Nov 2009 18:43:18 -0500; I'll repeat one more time. The dinky diode doesnt prevent tube and circuit damage, it shorts after the damage is done. All it provides is a false sense of security and a cheap way to do metering. As; /archives//html/Amps/2009-11/msg00130.html (9,701 bytes)
20. Re: [Amps] B- questions (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sun, 8 Nov 2009 12:41:38 -0500; Most quality USA made meters, and especially the old military ones, will safely withstand up to 2500V or so which is a common ham amp voltage. Mounting the meter behind glass is a sure fire way of pr; /archives//html/Amps/2009-11/msg00127.html (10,322 bytes)

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