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Total 22 documents matching your query.

1. [Amps] ARF1505 (score: 1): Author: "Will Matney" <craxd1@ezwv.com>; Date: Thu, 19 May 2005 12:12:42 -0400; All, Has anyone tried the ARF1505 FET in any solid state amps yet? The characteristics look very good and it is a HV FET running at 300 Vdc with a 700 watt output. It is for operation primarily from; /archives//html/Amps/2005-05/msg00207.html (7,448 bytes)
2. Re: [Amps] ARF1505 (score: 1): Author: Tony King - W4ZT <amps@w4zt.com>; Date: Thu, 19 May 2005 12:22:25 -0400; Probably to generate a quick market! I'm sure it will do just that. 73, Tony W4ZT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mai; /archives//html/Amps/2005-05/msg00208.html (7,903 bytes)
3. Re: [Amps] ARF1505 (score: 1): Author: "Will Matney" <craxd1@ezwv.com>; Date: Thu, 19 May 2005 12:37:44 -0400; Tony, I figured either that or they just went out and bought a cheap transceiver to do the test, which we know they are the cheapest. One thing, that's a cheap single device amp shown to construct. T; /archives//html/Amps/2005-05/msg00209.html (8,590 bytes)
4. Re: [Amps] ARF1505 (score: 1): Author: Vic Rosenthal <vic@rakefet.com>; Date: Thu, 19 May 2005 10:33:41 -0700; Because it's one of the standard frequencies (the other is 13.56 MHz) for ISM devices like plasma generators. Not what you're thinking! -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco __________; /archives//html/Amps/2005-05/msg00210.html (6,649 bytes)
5. [Amps] ARF1505 (score: 1): Author: "Gene Bigham" <jbigham2@kc.rr.com>; Date: Fri, 20 May 2005 15:31:41 -0500; Dang, that look like a solid state version for a triode capable of legal limit power output just waiting to happen. But when I clicked on "Buy" it returned not available, is this vapor semiconductors; /archives//html/Amps/2005-05/msg00215.html (7,256 bytes)
6. Re: [Amps] ARF1505 (score: 1): Author: Dan Levin <djl@andlev.com>; Date: Fri, 20 May 2005 13:40:05 -0700 (PDT); Cooling a 750 watt point source is a major problem. One is almost certainly better off (in a ham application) using several smaller parts (ARF463 e.g.) - which will require more circuitry but will a; /archives//html/Amps/2005-05/msg00216.html (7,426 bytes)
7. Re: [Amps] ARF1505 (score: 1): Author: "Will Matney" <craxd1@ezwv.com>; Date: Fri, 20 May 2005 16:47:03 -0400; Gene, They have the search link for Richardson screwed up. Go and use the part search again after the window opens that says it's not there, and re-type in the part number. If I recall, 1-50 were lik; /archives//html/Amps/2005-05/msg00217.html (7,831 bytes)
8. Re: [Amps] ARF1505 (score: 1): Author: "Will Matney" <craxd1@ezwv.com>; Date: Fri, 20 May 2005 16:57:03 -0400; I think they mentioned using a copper spreader plate because of this in the literature. The part itself, where it hits the heatsink is about 1-1/16" X 1-1/16" square. That's a good bit of concentrate; /archives//html/Amps/2005-05/msg00218.html (8,880 bytes)
9. Re: [Amps] ARF1505 (score: 1): Author: Dave Haupt <emailw8nf@yahoo.com>; Date: Fri, 20 May 2005 15:46:50 -0700 (PDT); 27.12 MHz is one popular ISM frequency. 13.56 MHz is probably the most popular. Tune any receiver to 13.56 MHz and you'll always hear a carrier, usually a bit wobbly and often with AC hum. Gigawatts; /archives//html/Amps/2005-05/msg00221.html (8,970 bytes)
10. Re: [Amps] ARF1505 (score: 1): Author: "Winfried Kriegl" <dk9ip@gmx.de>; Date: Sat, 21 May 2005 01:16:37 +0200 (MEST); Are these devices suitable for LINEAR operation ? 73 Win DK9IP/KH7CD a 700 link notice -- Weitersagen: GMX DSL-Flatrates mit Tempo-Garantie! Ab 4,99 Euro/Monat: http://www.gmx.net/de/go/dsl _________; /archives//html/Amps/2005-05/msg00222.html (9,123 bytes)
11. Re: [Amps] ARF1505 (score: 1): Author: Tony King - W4ZT <amps@w4zt.com>; Date: Fri, 20 May 2005 19:30:12 -0400; Actually 18.301 says the following: "ISM equipment may be operated on any frequency above 9 kHz except as indicated in Sec. 18.303." and... Sec. 18.303 Prohibited frequency bands. Operation of ISM eq; /archives//html/Amps/2005-05/msg00223.html (11,537 bytes)
12. Re: [Amps] ARF1505 (score: 1): Author: "Will Matney" <craxd1@ezwv.com>; Date: Fri, 20 May 2005 23:44:51 -0400; What the spec sheet says is this; "The ARF1505 is an RF power transistor designed for off-line 300V operation in very high power scientific, commercial, medical and industrial RF power generator and; /archives//html/Amps/2005-05/msg00231.html (10,737 bytes)
13. Re: [Amps] ARF1505 (score: 1): Author: Steve Thompson <g8gsq@ic24.net>; Date: Sat, 21 May 2005 09:00:35 +0100; It might not be quite that simple. If I remember the app. note for the 50MHz 'linear', the IMD is always poor because the devices don't have a linear transfer characterisitic - the power in/out curve; /archives//html/Amps/2005-05/msg00233.html (9,272 bytes)
14. Re: [Amps] ARF1505 (score: 1): Author: "Will Matney" <craxd1@ezwv.com>; Date: Sat, 21 May 2005 04:23:53 -0400; Steve, I don't know on this device as the spec sheet doesn't have any curve charts, etc. One could probably get them from the manufacturer or I looked over where to download them. Best, Will ** REPLY; /archives//html/Amps/2005-05/msg00234.html (10,282 bytes)
15. Re: [Amps] ARF1505 (score: 1): Author: Steve Thompson <g8gsq@ic24.net>; Date: Sat, 21 May 2005 09:34:26 +0100; I'm sure there will be enough interest for someone to generate the data. I was assuming that the underlying semiconductor design was similar to their other parts, in which case the characteristics ar; /archives//html/Amps/2005-05/msg00235.html (8,631 bytes)
16. Re: [Amps] ARF1505 (score: 1): Author: Karl-Arne Markström <sm0aom@telia.com>; Date: Sat, 21 May 2005 10:36:25 +0200; A comment on the 13.56 MHz ISM frequency tolerances. There are allocations in all 3 ITU regions between 13200 and 13360 kHz for air-ground HF/SSB. It is quite common in Europe to have to listen at VE; /archives//html/Amps/2005-05/msg00236.html (13,725 bytes)
17. Re: [Amps] ARF1505 (score: 1): Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>; Date: Mon, 23 May 2005 00:03:34 -0500; A couple of things here. I've used these for class AB amps, and they can be made pseudo linear... but only by running them at reduced voltage. Like all MOSFETs they have a negative temp. coef. The q.; /archives//html/Amps/2005-05/msg00263.html (11,585 bytes)
18. 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)
19. Re: [Amps] ARF1505 (score: 1): Author: "Roy Koeppe" <royanjoy@ncn.net>; Date: Mon, 23 May 2005 07:52:27 -0500; About, " By operating the device at 30-50% of the maximum voltage, this problem is solved... at least the gate shift can...(etc.)" By utilizing your outdoor pole pig as a 'remote' power supply transf; /archives//html/Amps/2005-05/msg00265.html (7,802 bytes)
20. [Amps] ARF1505 (score: 1): Author: "Gene Bigham" <jbigham2@kc.rr.com>; Date: Mon, 23 May 2005 15:41:23 -0500; OK, is the tail wagging the dog? Are we hypothetically reverse engineering an available device with all these limitations and drawbacks because it is available? Should we instead be asking the solid; /archives//html/Amps/2005-05/msg00272.html (7,766 bytes)

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