- 1. [Amps] push pull or parallel ? (score: 1)
- Author: "Carel, pc5m" <pc5m@xs4all.nl>
- Date: Mon, 26 Jan 2015 16:41:48 +0100
- Hi, 160mtrs contest past and we need more power... Plan is to add 3 dB by throwing in another tube (2.5kw anode dissipation Tetrode, grid driven). I could go for push-pull of just parallel the tube's
- /archives//html/Amps/2015-01/msg00296.html (7,296 bytes)
- 2. Re: [Amps] push pull or parallel ? (score: 1)
- Author: Steve London <n2icarrl@gmail.com>
- Date: Mon, 26 Jan 2015 08:50:55 -0700
- 160mtrs contest past and we need more power... Plan is to add 3 dB by throwing in another tube (2.5kw anode dissipation Tetrode, grid driven). I could go for push-pull of just parallel the tube's. I
- /archives//html/Amps/2015-01/msg00298.html (7,193 bytes)
- 3. Re: [Amps] push pull or parallel ? (score: 1)
- Author: KA4INM <ka4inm@gmail.com>
- Date: Mon, 26 Jan 2015 11:02:22 -0500
- 160mtrs contest past and we need more power... Plan is to add 3 dB by throwing in another tube (2.5kw anode dissipation tetrode, grid driven). I could go for push-pull of just parallel the tube's. I
- /archives//html/Amps/2015-01/msg00299.html (8,393 bytes)
- 4. [Amps] push pull or parallel ? (score: 1)
- Author: "Jim Thomson" <jim.thom@telus.net>
- Date: Mon, 26 Jan 2015 08:39:54 -0800
- Hi, 160mtrs contest past and we need more power... Plan is to add 3 dB by throwing in another tube (2.5kw anode dissipation Tetrode, grid driven). I could go for push-pull of just parallel the tube's
- /archives//html/Amps/2015-01/msg00300.html (9,180 bytes)
- 5. Re: [Amps] push pull or parallel ? (score: 1)
- Author: "Peter Voelpel" <dj7ww@t-online.de>
- Date: Mon, 26 Jan 2015 18:43:54 +0100
- What do you expect to gain with 3db more power when qsb on 160m is already much higher? And you donīt hear anything better when you go qro. 3db more gain with your antenna will be the biggest and pro
- /archives//html/Amps/2015-01/msg00303.html (8,067 bytes)
- 6. Re: [Amps] push pull or parallel ? (score: 1)
- Author: "Carel, pc5m" <pc5m@xs4all.nl>
- Date: Mon, 26 Jan 2015 19:40:34 +0100
- Hi, 160mtrs contest past and we need more power... Plan is to add 3 dB by throwing in another tube (2.5kw anode dissipation Tetrode, grid driven). I could go for push-pull of just parallel the tube's
- /archives//html/Amps/2015-01/msg00304.html (10,616 bytes)
- 7. Re: [Amps] push pull or parallel ? (score: 1)
- Author: "Carl" <km1h@jeremy.qozzy.com>
- Date: Mon, 26 Jan 2015 17:21:17 -0500
- In a series fed PP circuit the Tune cap has to stand off the full DC voltage plus the Peak RF. On AM that is 4X the DC voltage for spacing. Altho cap values in PP are lower they are dual sections wit
- /archives//html/Amps/2015-01/msg00309.html (10,983 bytes)
- 8. Re: [Amps] push pull or parallel ? (score: 1)
- Author: "Carl" <km1h@jeremy.qozzy.com>
- Date: Mon, 26 Jan 2015 17:21:53 -0500
- You can use a stub in the coax to get an easy 20-25dB additional second harmonic reduction. A lot less hassle in a mono band or just put a stub in individual antenna leads. Carl KM1H Hi, 160mtrs cont
- /archives//html/Amps/2015-01/msg00310.html (9,098 bytes)
- 9. Re: [Amps] push pull or parallel ? (score: 1)
- Author: "Carl" <km1h@jeremy.qozzy.com>
- Date: Mon, 26 Jan 2015 17:21:58 -0500
- Lower the Q for wider bandwidth and less need of a retune, you should be able to use a 6 Q and followed by coax stubs for 2nd and 3rd harmonics. Carl KM1H Hi, 160mtrs contest past and we need more po
- /archives//html/Amps/2015-01/msg00311.html (12,710 bytes)
- 10. Re: [Amps] push pull or parallel ? (score: 1)
- Author: Vic Rosenthal <k2vco.vic@gmail.com>
- Date: Tue, 27 Jan 2015 05:45:11 +0200
- I think the plate impedance is higher for push-pull than parallel operation with the same voltage and average plate current (no time now to look it up), because the tubes conduct over different parts
- /archives//html/Amps/2015-01/msg00315.html (12,006 bytes)
This search system is powered by
Namazu