- 1. [Amps] low cost IRF-MOSFET amps...... (score: 1)
- Author: "Dick" <knaap159@zonnet.nl>
- Date: Sat, 18 Mar 2006 20:36:41 +0100
- Hello, Anybody out there with experience in HF amplifiers using low cost IRF-MOSFETs? For example I found some designs in German magazines: in Funkamateur from DK6AE, 250W PEP with 6xIRF820 and in Fu
- /archives//html/Amps/2006-03/msg00538.html (6,907 bytes)
- 2. [Amps] UNID solid state amp with BDY58H (score: 1)
- Author: "Dick" <knaap159@zonnet.nl>
- Date: Tue, 16 May 2006 22:54:37 +0200
- Hello , I came across some parts of the final amp of a "Radio Holland" MF&2182 transmitter, type ST86E I have 2 blocks, each one consisting of two BDY58 H transistors. Anyone around how know this tra
- /archives//html/Amps/2006-05/msg00142.html (6,829 bytes)
- 3. [Amps] 70MHz transistor PA, schematics?? (score: 1)
- Author: "Dick" <knaap159@zonnet.nl>
- Date: Sat, 1 Jul 2006 20:46:48 +0200
- Hello all, I'm looking for schematics for 70MHz transistorized power amplifiers. Sofar I can find some for 50MHz but nothing for 70MHz. Any one? 73 Dick ______________________________________________
- /archives//html/Amps/2006-07/msg00021.html (6,490 bytes)
- 4. [Amps] BLF278 on 50MHz?? (score: 1)
- Author: "Dick" <knaap159@zonnet.nl>
- Date: Tue, 4 Jul 2006 21:43:32 +0200
- Hello, Anyone tried to use the MOSFET BLF278 on 50MHz? Looking for schematics, figures/data. 73 Dick, PA4VHF _______________________________________________ Amps mailing list Amps@contesting.com http
- /archives//html/Amps/2006-07/msg00197.html (6,128 bytes)
- 5. [Amps] TP9383 (SD1460) used in SSB amplifiers? (score: 1)
- Author: "Dick" <knaap159@zonnet.nl>
- Date: Sat, 8 Jul 2006 07:47:13 +0200
- Hello, Anyone tried the TP9383 or SD1460 transistor in a class AB amplifier? Originally it's a 28V transistor , 150Watt max in FM-band 88-108MHz. I think it can work well on 50 and 70MHz, but can't f
- /archives//html/Amps/2006-07/msg00272.html (6,421 bytes)
- 6. [Amps] TP9383/SD1460 used in 70MHz PA (score: 1)
- Author: "Dick" <knaap159@zonnet.nl>
- Date: Tue, 11 Jul 2006 22:22:15 +0200
- First of all thanks those who replied to my question. Indeed these transtors came from an old FM-broadcast amplifier. I just have some of them, and I want to try to use them on 70MHz. 70MHz is the Eu
- /archives//html/Amps/2006-07/msg00332.html (6,504 bytes)
- 7. [Amps] plexiglas isolation in coils (score: 1)
- Author: "Dick" <knaap159@zonnet.nl>
- Date: Wed, 26 Jul 2006 22:08:00 +0200
- Hi, I want to run a high power bandpass filter behind an HF-amplifier. The filter should work with powers upto 1kW, which means that high voltages can be present in the circuit. It's the W3NQN design
- /archives//html/Amps/2006-07/msg01184.html (7,287 bytes)
- 8. Re: [Amps] plexiglas isolation in coils (score: 1)
- Author: "Dick" <knaap159@zonnet.nl>
- Date: Thu, 27 Jul 2006 06:54:59 +0200
- Thanks all for the comments. I forgot to think about coil heating due to the high power, which might cause the plexiglas to melt...... 73 Dick, pa4vhf _______________________________________________
- /archives//html/Amps/2006-07/msg01209.html (7,474 bytes)
- 9. [Amps] W3NQN High power RF Harmonic filters (score: 1)
- Author: "Dick" <knaap159@zonnet.nl>
- Date: Thu, 27 Jul 2006 06:59:39 +0200
- I found these on internet, but only as complete kits which I have to buy..... But, I want to make them myself. I am looking for the schematics, component values etc from these filters. So, I am not l
- /archives//html/Amps/2006-07/msg01210.html (6,452 bytes)
- 10. [Amps] BLF278 (MRF151G) on 50MHz? (score: 1)
- Author: "Dick" <knaap159@zonnet.nl>
- Date: Wed, 9 Aug 2006 20:52:03 +0200
- Hello this FET performs very well on 144MHz in a SSB-PA , and in the past I used one on 50MHz as well. However this design is a lot of 'trial-and-error' , so probably it isn't working optimal. I wond
- /archives//html/Amps/2006-08/msg00358.html (6,477 bytes)
- 11. [Amps] JA1BOP's MOSFET PA for 50MHz (score: 1)
- Author: "Dick" <knaap159@zonnet.nl>
- Date: Wed, 9 Aug 2006 21:27:24 +0200
- While searching for 50MHz PA designs with the BLF278 or equivalent (MFR151G, SD2932?) I came across the website from JA1BOP descibing such an amplifier,............in Japanese, unfortunatly, and with
- /archives//html/Amps/2006-08/msg00361.html (6,956 bytes)
- 12. [Amps] Alpin 100/GU74b contest performance? (score: 1)
- Author: "Dick" <knaap159@zonnet.nl>
- Date: Wed, 8 Aug 2007 22:29:56 +0200
- Hello, I am rather unfamiliar with tube-based amplifiers, so therefore some questions: Wonder if anyone has some in field experience in using the Alpin 100 amplifier in a CW contest, like CQWW. How a
- /archives//html/Amps/2007-08/msg00034.html (6,854 bytes)
- 13. [Amps] Emtron DX2 with 2xGU74b pse info (score: 1)
- Author: "Dick" <knaap159@zonnet.nl>
- Date: Sat, 11 Aug 2007 10:06:56 +0200
- Hello all, Anyone around who can tell me more about the Emtron DX2 amplifier with 2xGU74b ? It is rather difficult to find info about this one. (I can find the one with GU84, but that is not the one
- /archives//html/Amps/2007-08/msg00040.html (6,491 bytes)
- 14. [Amps] use of Emtron DX-2 during contest/expedition (score: 1)
- Author: "Dick" <knaap159@zonnet.nl>
- Date: Thu, 1 Nov 2007 22:26:00 +0100
- Anyone with experience with the Emtron DX-2 during a 48 hour contest or DX-pedition? What is the save level to operate it in SSB and in CW during 48 hours of operating without tripping the temperatur
- /archives//html/Amps/2007-11/msg00001.html (7,094 bytes)
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