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1. [Amps] Transformer ID help???? (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Wed, 27 Nov 2002 00:04:39 -0500; Hi Randy, you got yourself the plate and filament transformers from and SB-220. The schematic is online at bama.sbc.edu and will give you the color codes. 73, Bill ~~~~~~~~~~~~~~~~ Bill Coleman N2BC; /archives//html/Amps/2002-11/msg00378.html (7,750 bytes)
2. [Amps] Meter Faces (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Wed, 30 Oct 2002 09:18:24 -0500; Corel works well - but $$$ I use a CAD program, DELTACAD. http://www.dcad.com/ They have a free trial, but the entire product was less than $50. Works great for laying out chassis components, labels,; /archives//html/Amps/2002-10/msg00316.html (10,418 bytes)
3. [Amps] Tank tweaking (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Sun, 22 Sep 2002 09:51:08 -0400; A few months ago I posted a query about crummy efficiency on my homebrew = 5CX1500 AB1 amp. I have cured most of the original problems by re-doing = the input circuit and tweaking the output tank coi; /archives//html/Amps/2002-09/msg00170.html (7,950 bytes)
4. [Amps] Tank tweaking (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Sun, 22 Sep 2002 11:15:28 -0400; Q=12 ~~~~~~~~~~~~~~~~ Bill Coleman N2BC http://home.stny.rr.com/n2bc -- Original Message -- From: <wwd@netheaven.com> To: <amps@contesting.com> Sent: Sunday, September 22, 2002 10:42 AM Subject: Re:; /archives//html/Amps/2002-09/msg00174.html (8,846 bytes)
5. [Amps] Fw: Tank tweaking (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Sun, 22 Sep 2002 12:45:19 -0400; I left off some info, target Q is 12. Have also made some progress. =20 I stuck in an additional 1000 pF on the plate blocking cap (from 800 pF = to 1800 pF) & the results are more reasonable. Am now; /archives//html/Amps/2002-09/msg00177.html (9,138 bytes)
6. [Amps] Fw: Tank tweaking (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Sun, 22 Sep 2002 21:02:02 -0400; Thanks for all the ideas. I've had a few requests for a couple bits of = data... On 160 the target Q is 12, Plate load is 3200 ohms. =20 I have tried changing the plate blocking cap from 800 pF (it w; /archives//html/Amps/2002-09/msg00189.html (9,366 bytes)
7. [Amps] 160M tank tweaks (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Mon, 23 Sep 2002 09:07:14 -0400; Thanks for the additional ideas regarding my 160M woes... =20 Wattmeter lies: I've not noticed that in other applications. I added a = Nye Viking RFM-5 in series and get similar readings.=20 Skin eff; /archives//html/Amps/2002-09/msg00202.html (7,618 bytes)
8. [Amps] Loading terminology (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Mon, 5 Aug 2002 23:48:04 -0400; I have often wondered why the terms heavy & light.... and why increased loading is less load C (and of course decreased loading is more load C). Is heavy/light and increased/decreased referring to th; /archives//html/Amps/2002-08/msg00078.html (7,648 bytes)
9. [Amps] Need hints.... (wordy) (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Thu, 20 Jun 2002 23:06:56 -0400; Here's the deal, I'm 'converting' a 2KW 13.56mHz plasma generator for = 160 thru 10. The basics: 5CX1500A, 3.8KV EP. Got it running 'stock' (class C) = before conversion, easy 2KW output. =20 Convers; /archives//html/Amps/2002-06/msg00169.html (8,036 bytes)
10. [Amps] Re: "Need hints" (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Fri, 21 Jun 2002 07:01:07 -0400; Re: my earlier whining - "mushy" loading on 5CX1500 amp project. Thanks for all the hints. I had used some parts from a second RF deck = without checking them.... found a bad cap in the plate blockin; /archives//html/Amps/2002-06/msg00172.html (7,354 bytes)
11. [Amps] HEC (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Fri, 24 May 2002 07:58:50 -0400; http://www.highenergycorp.com/ ~~~~~~~~~~~~~~~~ Bill Coleman N2BC http://home.stny.rr.com/n2bc -- Original Message -- From: "Richard" <2@mail.vcnet.com> To: " AMPS" <amps@contesting.com> Sent: Friday; /archives//html/Amps/2002-05/msg00408.html (6,993 bytes)
12. [Amps] 5CX1500A Datasheet (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Tue, 2 Apr 2002 17:32:10 -0500; Anybody have the 5CX1500A datasheet in electronic format (PDF, GIF, whatever)? Could you email it to me?? THX, Bill ~~~~~~~~~~~~~~~~ Bill Coleman N2BC http://home.stny.rr.com/n2bc; /archives//html/Amps/2002-04/msg00093.html (6,670 bytes)
13. [Amps] WTD: 5CX1500A Datasheet (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Tue, 2 Apr 2002 19:59:17 -0500; Thanks to all who aimed me at the Svetlana info - I should have mentioned that I already had this in my first post. The Svetlana datasheet is rather abbreviated. Anybody got an old Eimac datasheet, w; /archives//html/Amps/2002-04/msg00100.html (7,098 bytes)
14. [Amps] PI net question... (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Fri, 19 Apr 2002 10:18:20 -0400; The scenario: I plan to insert a small (.3uH) coil in series with the PA tube to reduce the tube's output C effects on the higher frequencies. For the sake of discussion, lets say the target plate lo; /archives//html/Amps/2002-04/msg00470.html (8,647 bytes)
15. [Amps] equipment to be modified (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Fri, 26 Apr 2002 08:24:59 -0400; Dale, there is industrial equipment stuff out there - at least stuff suitable for HF amplifiers. I'm working on a 2KW "Plasma Generator" right now. It's a self-contained 2KW 13.56mHz transmitter. Xta; /archives//html/Amps/2002-04/msg00562.html (8,169 bytes)
16. [Amps] TenTec Titan 425 (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Fri, 8 Mar 2002 07:50:02 -0500; Jim, I recall the same results, the ALC was quite inconsistent from band-to-band. There's a mod in QST June 1993 page 74 that will lock out the Titan on a grid overcurrent. I used to haul my Titan to; /archives//html/Amps/2002-03/msg00157.html (8,830 bytes)
17. [Amps] Source for 220V cords (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Fri, 8 Mar 2002 08:11:13 -0500; Ground and Neutral are the same in the MAIN breaker box - not necessarily in all breaker boxes... A branch circuit (probably quite common for post-construction install of 240V in our shacks) must hav; /archives//html/Amps/2002-03/msg00158.html (11,641 bytes)
18. [Amps] Source for 220V cords (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Fri, 8 Mar 2002 14:20:00 -0500; Two pole GFCI's not hard to find at all. Probably best to go to an electrical supply rather than a DIY home store. Of course the type of panel makes a difference too. I found out the manufacturer of; /archives//html/Amps/2002-03/msg00183.html (13,688 bytes)
19. [Amps] Source for 220V cords (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Fri, 8 Mar 2002 14:30:56 -0500; I agree with Gary about branch circuits - the ground and neutral must be maintained separate & the neutral connection bar is isolated from the branch circuit box chassis. The discussion about 3-wire; /archives//html/Amps/2002-03/msg00184.html (14,955 bytes)
20. [Amps] Source for 220V cords --Thanks (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Fri, 8 Mar 2002 14:46:06 -0500; Interesting... I've never had a problem with RF bothering a GFCI. My KW AM broadcast transmitter (in the garage) is on a 30A two-pole GFCI about 20' away from the panel with other GFCIs. The old RCA; /archives//html/Amps/2002-03/msg00187.html (8,520 bytes)

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