Search String: Display: Description: Sort:

Results:

References: [ +from:ve7vv@shaw.ca: 10 ]

Total 10 documents matching your query.

1. [Amps] new 2200m/630m amplifier - distorted waveform output (score: 1)
Author: Roger Graves <ve7vv@shaw.ca>
Date: Fri, 25 May 2018 08:07:55 -0700
I would like advice on a new 2200/630m amplifier that I have built. It works but exhibits two problems. It uses a pair of APT5023 mosfets, 48Vdc supply, output transformer 3T:6T on a pair of 26mm typ
/archives//html/Amps/2018-05/msg00023.html (9,665 bytes)

2. [Amps] new 2200m/630m amplifier - distorted waveform output (score: 1)
Author: Roger Graves <ve7vv@shaw.ca>
Date: Sat, 26 May 2018 09:10:45 -0700
I would like advice on a new 2200/630m amplifier that I have built. It works but exhibits two problems. It uses a pair of APT5023 mosfets, 48Vdc supply, output transformer 3T:6T on a pair of 26mm typ
/archives//html/Amps/2018-05/msg00026.html (9,620 bytes)

3. Re: [Amps] new 2200m/630m amplifier - distorted waveform output (score: 1)
Author: Roger Graves <ve7vv@shaw.ca>
Date: Sun, 27 May 2018 15:50:45 -0700
Hello Manfred, Thank you very much for the quick and very informative reply. I will follow your advice and work on eliminating the turn-on transient. There are 56 Ohm gate resistors and a small amoun
/archives//html/Amps/2018-05/msg00033.html (19,391 bytes)

4. Re: [Amps] new 2200m/630m amplifier - distorted waveform output (score: 1)
Author: Roger Graves <ve7vv@shaw.ca>
Date: Sun, 27 May 2018 19:35:13 -0700
Manfred, Thank you for the helpful followup. I will try lower value gate resistors. That will also have the advantage that I will be able to drive to higher output on 160 I think. (My 1W drive is not
/archives//html/Amps/2018-05/msg00034.html (12,916 bytes)

5. Re: [Amps] new 2200m/630m amplifier - distorted waveform output (score: 1)
Author: Roger Graves <VE7VV@shaw.ca>
Date: Mon, 28 May 2018 14:02:34 -0700
Thank you very much Manfred. Your notes have wonderful technical information. I have learned a lot from this correspondence. You have provided an excellent design tutorial! I will lower the series ga
/archives//html/Amps/2018-05/msg00038.html (15,991 bytes)

6. Re: [Amps] new 2200m/630m amplifier - distorted waveform output (score: 1)
Author: Roger Graves <ve7vv@shaw.ca>
Date: Thu, 31 May 2018 09:19:01 -0700
Manfred, the distorted waveform output (observed before at amp output when driving the antenna either with or without a T form LPF) is fixed. Thank you for suggesting using a Pi form LPF. When I buil
/archives//html/Amps/2018-06/msg00000.html (14,276 bytes)

7. Re: [Amps] new 2200m/630m amplifier - distorted waveform output (score: 1)
Author: Roger Graves <ve7vv@shaw.ca>
Date: Sat, 2 Jun 2018 12:43:25 -0700
Thanks for the info Jim. This amp project has been a fun learning experience. I appreciate all the help I have gotten along the way from more experienced guys. 73, Roger . ___________________________
/archives//html/Amps/2018-06/msg00001.html (18,297 bytes)

8. Re: [Amps] new 2200m/630m amplifier - distorted waveform output (score: 1)
Author: Roger Graves <VE7VV@shaw.ca>
Date: Sun, 3 Jun 2018 18:35:02 -0700
Hello Jim, It was nice to hear from you. I have really enjoyed and utilized your A Ham's Guide to RFI, Ferrites, Baluns, and Audio Interfacing. It is a great resource. Thanks for making that availabl
/archives//html/Amps/2018-06/msg00007.html (13,954 bytes)

9. Re: [Amps] new 2200m/630m amplifier - distorted waveform (score: 1)
Author: Roger Graves <ve7vv@shaw.ca>
Date: Wed, 6 Jun 2018 10:41:19 -0700
Hello Jim, Nice to hear from you again. The transmission line balun that I made for the amp, as mentioned in a previous post, was 5T of bifilar wire around an unknown (grey) toroid that resulted in 2
/archives//html/Amps/2018-06/msg00011.html (9,664 bytes)

10. Re: [Amps] MOSFET amp for 80 m (score: 1)
Author: Roger Graves <ve7vv@shaw.ca>
Date: Wed, 18 Jul 2018 13:09:37 -0700
Angel, Manfred may reply for himself, but from one of his webpages https://ludens.cl/Electron/mosfetamps/amps.html <https://ludens.cl/Electron/mosfetamps/amps.html> his analysis of the circuit shows
/archives//html/Amps/2018-07/msg00059.html (9,411 bytes)


This search system is powered by Namazu