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1. [Amps] russian caps (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Mon, 7 Dec 2009 19:18:58 +0200; They are very good! Baruch Zilbershatz Call sign : 4z4 rb Baruch Zilbershatz Nitzanay-Oz 118 Nitzanay-Oz 42836 ISRAEL "res ipsa loquitur" _______________________________________________ Amps mailing; /archives//html/Amps/2009-12/msg00193.html (6,789 bytes)
2. [Amps] ENI transistors (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Sun, 17 Jan 2010 17:51:39 +0200; Hi All I have a few rf boards by ENI .Looks like standard MOSFET push-pull rf linear power amps at 50V. The transistor is MOTO ENI-30B kind of custom made rf mos Anybody on list has any Data or diagr; /archives//html/Amps/2010-01/msg00240.html (6,540 bytes)
3. [Amps] ENI amps and parts (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Wed, 20 Jan 2010 18:26:23 +0200; Hi to All! A while ago I asked for help on Mosfets made by MOTO for ENI called EN 30B I think they are clones of MRF150 or the Industrial MRF151 . I have 4 boards and before applying any power I woul; /archives//html/Amps/2010-01/msg00262.html (6,623 bytes)
4. [Amps] amps (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Tue, 5 Oct 2010 05:32:34 +0200; You can look up at my sales page on ebay for solid state amps and drivers. Listed under my call sign 4z4rb You might find what you need as a driver or a stand alone medium power amp. Thanks 4z4rb Bar; /archives//html/Amps/2010-10/msg00019.html (6,587 bytes)
5. Re: [Amps] Switching Supplies for High Current Filaments (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Wed, 6 Oct 2010 07:19:13 +0200; Why not use a regular filament transformer? Baruch Zilbershatz Nitzanay-Oz 118 Nitzanay -Oz 42836 ISRAEL phone: (+)972-052 8753838 _______________________________________________ Amps mailing list Am; /archives//html/Amps/2010-10/msg00042.html (7,628 bytes)
6. [Amps] New 2 PA design (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Fri, 15 Oct 2010 18:18:53 +0200; Hi The power supply portion sounds good. Your selection of device is good and there is a lot on the net about them. A couple of SD2932 can be used as push pull single unit provided that you strap eac; /archives//html/Amps/2010-10/msg00235.html (7,419 bytes)
7. Re: [Amps] New 2 PA design (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Fri, 15 Oct 2010 23:59:23 +0200; ARF1500 are very fine devices. few DL guys had built the published circuit and even Modified parts of it. There is a partial kit from the THP guys in Japan . They will supply 2 fets ,boards, and all; /archives//html/Amps/2010-10/msg00245.html (9,153 bytes)
8. Re: [Amps] New 2 PA design (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Sat, 16 Oct 2010 00:36:05 +0200; Never seen an app. Note for it. That German guy had it running great although He managed to blow one fet during setup. He had it framed on his shack wall! Baruch Zilbershatz Nitzanay-Oz 118 Nitzanay; /archives//html/Amps/2010-10/msg00249.html (9,314 bytes)
9. Re: [Amps] New 2 PA design (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Sat, 16 Oct 2010 09:41:22 +0200; I already sent Hsu all relevant files. Thank you. I have been playing lately with a new board that I designed with 8 ARF449. I am at very early stages. I want to try it since I have a pack of 100 pcs; /archives//html/Amps/2010-10/msg00258.html (9,053 bytes)
10. Re: [Amps] New 2 PA design (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Sun, 17 Oct 2010 07:37:41 +0200; The DL guys that built that gizmo had it clamped with copper bars and screws both sides to a copper heat sink .looks great. One guy made his own Al heatsink from folded Al strips and on top of it had; /archives//html/Amps/2010-10/msg00264.html (10,261 bytes)
11. [Amps] BLF574 (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Sun, 17 Oct 2010 07:40:22 +0200; I have designed a new board for 2xBLF574 . Anybody has some thoughts on it maybe hands-on experience? Baruch Zilbershatz Nitzanay-Oz 118 Nitzanay -Oz 42836 ISRAEL phone: (+)972-052 8753838 __________; /archives//html/Amps/2010-10/msg00265.html (6,273 bytes)
12. Re: [Amps] New 2 PA design (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Sun, 17 Oct 2010 08:26:00 +0200; Thank you for correction. In Hebrew it is very easy... Baruch Zilbershatz Nitzanay-Oz 118 Nitzanay -Oz 42836 ISRAEL phone: (+)972-052 8753838 screws both sides to a copper heat sink .looks great. had; /archives//html/Amps/2010-10/msg00267.html (13,323 bytes)
13. Re: [Amps] New 2 PA design (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Sun, 17 Oct 2010 19:55:28 +0200; I am still unable to find out what is the price for the device. I have finished my 2xBLF574 board with all the bias circuitry and thermal sensors. I will make the board tomorrow and begin to populate; /archives//html/Amps/2010-10/msg00273.html (11,058 bytes)
14. [Amps] ALS-1300 (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Sun, 14 Nov 2010 18:05:00 +0200; Hi to all! I was wondering if anyone on the group has schematic diagram of the Ameritron ALS1300 . I would like to look at it and maybe learn a few things. Thanks 4z4rb 4z4rb@qsl.net Baruch Zilbersha; /archives//html/Amps/2010-11/msg00213.html (6,361 bytes)
15. [Amps] Amps] What a shame... (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Wed, 24 Nov 2010 21:01:25 +0200; Yes but take a look at this beauty!!! 280593783362 4z4rb baruch _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2010-11/msg00417.html (6,421 bytes)
16. Re: [Amps] Tube Cooling.. (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Thu, 25 Nov 2010 20:01:34 +0200; I need a gu-81 socket too can I have Dr. Alex web link? Baruch Zilbershatz Nitzanay-Oz 118 Nitzanay -Oz 42836 ISRAEL phone: (+)972-052 8753838 _______________________________________________ Amps mai; /archives//html/Amps/2010-11/msg00441.html (7,764 bytes)
17. Re: [Amps] Silicon Carbide J-FET (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Thu, 25 Nov 2010 21:58:01 +0200; They are obviously not targeting the linear market. For linear applications, limiting these devices at 175 C is absurd, SiC can easily take 250 C junction temperature before even thinking about incre; /archives//html/Amps/2010-11/msg00448.html (9,522 bytes)
18. Re: [Amps] Silicon Carbide J-FET (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Thu, 25 Nov 2010 22:06:37 +0200; Ive been looking into these SIC devices and found a company producing them in Japan, they have quite a range. At the moment Im trying to get datasheets pricing and availibity on them then Ill post so; /archives//html/Amps/2010-11/msg00449.html (7,686 bytes)
19. Re: [Amps] Silicon Carbide J-FET (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Thu, 25 Nov 2010 22:13:24 +0200; These new JFETs have a very low distortion characteristic that makes them superb for use in linear amplifiers. In apples-to-apples comparisons with MOSFET-type power transistors, they can achieve 10; /archives//html/Amps/2010-11/msg00450.html (7,777 bytes)
20. Re: [Amps] Silicon Carbide J-FET (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Thu, 25 Nov 2010 22:20:13 +0200; I am working on a design now for some time .already layout is done and all needed Indeed in a common gate with transmission type 4;1 out/in I am going to play with 300vdc 4z4rb Baruch Zilbershatz Nit; /archives//html/Amps/2010-11/msg00451.html (7,096 bytes)

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