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1. [Amps] Solid state amps (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Thu, 31 Mar 2005 16:09:18 -0500; Hi all, I've collected parts to do 9 push pull MRF150 stages and someday maybe I will assemble. The boards will be modified ENI surplus. I found ENI transformers don't work well below 7 MHz. and the; /archives//html/Amps/2005-03/msg00749.html (6,771 bytes)
2. Re: [Amps] need a channel 11 VHF high band TX? tspa (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Fri, 1 Apr 2005 15:05:10 -0500; Hi, Take a look at the IXYS IXZ210N50L with "S" specs to 500 MHz. WA1GFZ I am developing an RF amplifier system for the particle factory, with a nice new tetrode. However, I need a new driver, as I a; /archives//html/Amps/2005-04/msg00021.html (8,333 bytes)
3. Re: [Amps] Transistor amps (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Wed, 6 Apr 2005 10:42:27 -0400; I think the DX50 used IRF350s which are pigs at HF. I don't know what Harris uses in their DX series of solid state devices... Here is a site that shows the same module's used at WLS Chicago... it's; /archives//html/Amps/2005-04/msg00126.html (7,437 bytes)
4. Re: [Amps] Transistor amp's (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Thu, 7 Apr 2005 08:57:24 -0400; How about output transformer core material?? I assume 1:2 turns ratio on the transformer? Bias is 500mA pr module; IMD3 has not been measured, but reports on the band have been uniformly good. More t; /archives//html/Amps/2005-04/msg00141.html (14,667 bytes)
5. Re: [Amps] re ebay and amps (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Tue, 12 Apr 2005 13:49:32 -0400; I sold a Cubic R3030A a few months ago by listing it on a couple BBs. Still today yet another scammer mails me with the same scam to rip me off. These guys are usually on yahoo and are across the pon; /archives//html/Amps/2005-04/msg00224.html (7,840 bytes)
6. Re: [Amps] B&W plate choke (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Wed, 13 Apr 2005 08:12:13 -0400; 800 is 90 UH and the 802 is 200 UH. #26 wire if I remember. I've used both hanging off a 4-1000A. You need the 802 for 160 meters. The 800 is resonant around 25 MHz. Dudes Does anyone know the specs; /archives//html/Amps/2005-04/msg00249.html (8,227 bytes)
7. Re: [Amps] B&W plate choke (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Wed, 13 Apr 2005 08:20:05 -0400; I've hung a B&W 800 off a 4CX3000A myself. That is 2500 volts AM so actually 5 KW peak. I've done 5500 volts without failure. They go off like a Thompson machine gun if resonated. Easy to repair thou; /archives//html/Amps/2005-04/msg00250.html (9,199 bytes)
8. Re: [Amps] B&W plate choke (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Wed, 13 Apr 2005 09:00:05 -0400; The 802 is just a number of close wound turns at the bottom of the form to increase the inductance. I have never measured the series resonance but my old 4-1000A rig was converted to cover 160 meters; /archives//html/Amps/2005-04/msg00253.html (8,739 bytes)
9. Re: [Amps] B&W plate choke (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Wed, 13 Apr 2005 14:05:15 -0400; I may be wrong on the wire size try #28. The bottom 1/3 of the choke was close wound if I remember. Try the calculation for 90 uH to check yourself. I'm working from memory here. We agree it needs to; /archives//html/Amps/2005-04/msg00262.html (9,115 bytes)
10. Re: [Amps] Follow up: Skin Effect and Wire Current Capacity at HF (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Fri, 15 Apr 2005 12:02:39 -0400; My 75 meter solid state final has silver plated 1/8 tubing. 1 minute at 1 KW out gets the inductor pretty hot. I wouldn't use anything smaller than that. SSB it would run cooler with less heating. A; /archives//html/Amps/2005-04/msg00296.html (12,621 bytes)
11. Re: [Amps] Skin Effect and Wire Current Capacity at HF (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Fri, 15 Apr 2005 14:21:41 -0400; I think it was 1 KW input am modulated so close enough. Dan, Check some of the earlier handbooks back in the 80's or 70's. They did have a table in there for frequency and power to wire size. At 30 M; /archives//html/Amps/2005-04/msg00300.html (10,383 bytes)
12. Re: [Amps] Hipersil, the myth and the truth. (Updated) (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Mon, 18 Apr 2005 14:11:32 -0400; Remember a lot of the mil stuff in the air is running at 400 Hz. Also the environmental testing may have been harder to pass with EI transformers. Maybe C cores don't need to be potted to pas humidit; /archives//html/Amps/2005-04/msg00372.html (10,058 bytes)
13. Re: [Amps] Led display problem (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Tue, 19 Apr 2005 09:30:57 -0400; how about a hall effect sensor??? Hi All, I'm new on this list... I'm planning to build a 2m amp with a 4CX1500B tetrode. I want it a bit state of the art and replace the meters with LED bars. My des; /archives//html/Amps/2005-04/msg00397.html (8,385 bytes)
14. Re: [Amps] RE : Led display problem (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Tue, 19 Apr 2005 16:15:06 -0400; Hall effect is an active current transformer device so it would be used to measure current. I think digi key sells them. It converts current to volts. The device fits over an insulated wire for high; /archives//html/Amps/2005-04/msg00402.html (9,142 bytes)
15. Re: [Amps] Plate transformer current unknown (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Tue, 3 May 2005 16:13:20 -0400; Speaking of transformers. Does anyone know the ccs and ICS current ratings of a UTC CG310? gfz Angel, One last thing, since that core is that big, measure the thickness of an outside leg. A 4 inch co; /archives//html/Amps/2005-05/msg00028.html (17,176 bytes)
16. Re: [Amps] Plate transformer current unknown (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Tue, 3 May 2005 17:03:18 -0400; TNX OM, I have never seen ICS ratings either. I used to get a little sag in the voltage until I connected the second transformer in diode or mode. They run cool. fc According to the 1970 UTC catalog,; /archives//html/Amps/2005-05/msg00030.html (19,396 bytes)
17. Re: [Amps] [BULK] - Millen High Voltage Connectors (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Mon, 16 May 2005 12:13:33 -0400; I've seen the same trick using pl259 connectors with RG8 cable with the center conductor and dielectric going through both pl259 and so239. The only ones I have are single-conductor unshielded. You u; /archives//html/Amps/2005-05/msg00198.html (8,792 bytes)
18. Re: [Amps] Millen High Voltage Connectors (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Mon, 16 May 2005 12:14:17 -0400; I wouldn't use them myself Hello Amper's, What is the proper way to connect and wire the millen red high voltage connectors? I can't find any info on the proper use of these connectors. Thanks ** Mik; /archives//html/Amps/2005-05/msg00199.html (7,640 bytes)
19. Re: [Amps] ARF1505 (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Mon, 23 May 2005 08:47:16 -0400; A very smart thermal guy once told me the effective radius of a copper spreader is 10 times the thickness. I think they mentioned using a copper spreader plate because of this in the literature. The; /archives//html/Amps/2005-05/msg00264.html (9,912 bytes)
20. Re: [Amps] SGC Mini Lini...am i the only one (who doesn't get it? ) (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Fri, 27 May 2005 08:00:57 -0400; Gary walking is faster on the 405 Just an odd thought: if SGC was to offer the mini-lini and the purchaser chooses the module, sure wouldn't take too long to see who operates where. But... maybe the; /archives//html/Amps/2005-05/msg00309.html (9,643 bytes)

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