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Total 19 documents matching your query.

1. [Amps] 833A/GU-48 x4 Amp support (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Sat, 25 Feb 2012 22:00:29 +0000
Hi all, I am not an amps expert but I am thinking to build an amplifier using 4 x GU-48. I guess GU-48 is equivalent to 833A, not sur if all specs are same. This is trying to get an amp "looking beau
/archives//html/Amps/2012-02/msg00268.html (7,450 bytes)

2. Re: [Amps] 4 x Glass Glowing tubes (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Mon, 27 Feb 2012 10:37:48 +0000
Hi all, Bill, Yes, Bill is right. I am not looking for just watts. I don´t want a closed box with ceramic tubes inside (I already own one). What I would like to get is a beauty looking amp with good/
/archives//html/Amps/2012-02/msg00276.html (12,080 bytes)

3. Re: [Amps] 4 x Glass Glowing tubes (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Mon, 27 Feb 2012 16:44:23 +0000
Hi Bill, GU81M grounded grid... What you think about this one; http://www.ua1cbm.ru/images_doc/2008/pa_ex8a_hifi/HiFi_Contester_EX8A_image001.gif Thanks 73, Maximo ___________________________________
/archives//html/Amps/2012-02/msg00281.html (15,007 bytes)

4. Re: [Amps] 4 x Glass Glowing tubes (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Mon, 27 Feb 2012 19:51:27 +0000
Hi all, But, AB1 or AB2 I guess gets more Tx quality than class B, in SSB, isn´t it? 2 x GU81 Grounded Grid; http://f5ssk.blogspot.com/2011/06/2-gu-81-grilles-la-masse.html 2 x GU81M ; http://liamp.o
/archives//html/Amps/2012-02/msg00290.html (9,332 bytes)

5. Re: [Amps] 4 x Glass Glowing tubes (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Tue, 28 Feb 2012 18:37:15 +0000
Hi Ron, But it seems that 833A/GU48 are not good above 40m band. And it seems that are unstable as well. So, looks like 4 x GU81 grounded grid, used as triodes, are the best deal, in monoband design
/archives//html/Amps/2012-02/msg00318.html (12,549 bytes)

6. Re: [Amps] 4 x GU-81 Grounded Grid Penthodes (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Tue, 28 Feb 2012 18:43:33 +0000
Hi all, Ok, so lets do that, 4 x GU81 grounded grid configuration. Anyone has a schematic to follow? What levels could be fine? Thank you 73, Maximo - EA1DDO _________________________________________
/archives//html/Amps/2012-02/msg00319.html (9,538 bytes)

7. Re: [Amps] 4 x GU-81 Grounded Grid Penthodes (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Wed, 29 Feb 2012 15:52:47 +0000
Hi all, I found a schematic with GU81 grounded grid. What you think? http://ru3ga.qrz.ru/LAMP/200401.htm By the way, How much output power can we expect from GU81 GG ? Thanks 73, Máximo - EA1DDO ____
/archives//html/Amps/2012-02/msg00338.html (9,341 bytes)

8. Re: [Amps] 4 x GU-81 Grounded Grid Penthodes (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Fri, 2 Mar 2012 16:15:27 +0000
Hi all, I am already starting this project. Just a begginers question. Remember it is 4 x GU81 Grounded grid. Filament transformer. It is 12.6VAC around 11A each tube. Should I use one transformer pe
/archives//html/Amps/2012-03/msg00033.html (7,673 bytes)

9. Re: [Amps] 4 x GU-81 Grounded Grid Penthodes (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Fri, 2 Mar 2012 22:30:35 +0000
Hi all, I´ve been told that I can use DC for filaments (instead of AC), Is that true? If it is true, Can I use switching power supply for filaments? Tubes GU81 needs 12.6 v and around 10A, I could us
/archives//html/Amps/2012-03/msg00039.html (8,272 bytes)

10. [Amps] mu GU-81M (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Mon, 30 Apr 2012 15:13:32 +0000
Hi all, How can I know the GU-81M´s mu ? Is in the datasheet with a different name? http://danyk.wz.cz/gu81.pdf Is that high, medium or low mu ? Thank you 73, Maximo - EA1DDO ________________________
/archives//html/Amps/2012-04/msg00290.html (8,384 bytes)

11. [Amps] Output choke - Calculation (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Thu, 17 May 2012 07:52:06 +0000
Hi all, Just a quick one. How to calculate the output choke? (I mean, the coil at antenna output to groud, to install in a homebrew amplifier) I don´t know if it is frecuency related and/or power rel
/archives//html/Amps/2012-05/msg00292.html (6,842 bytes)

12. Re: [Amps] Output choke - Calculation (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Thu, 17 May 2012 15:09:33 +0000
Hi all, Now I have more clear the idea. Thank you to all of you 73, Maximo _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/li
/archives//html/Amps/2012-05/msg00295.html (10,920 bytes)

13. Re: [Amps] corona on a quad (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Fri, 13 Jul 2012 08:22:34 +0000
Hi Charles, Yes, we have suffered problems in a quad, but I guess that it can not be called "Corona", just power issue. I have designed a 4 elements quad for 27 MHz for a friend of mine who does "Key
/archives//html/Amps/2012-07/msg00184.html (18,678 bytes)

14. Re: [Amps] corona on a quad (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Fri, 13 Jul 2012 13:52:30 +0000
Yes, Gerald is right. If you set your quad as diamond, you will get HV in both side corners. So, diamond configuration is not good for high power. Box or square configuration has the HV points in the
/archives//html/Amps/2012-07/msg00189.html (8,704 bytes)

15. Re: [Amps] corona on a quad (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Fri, 13 Jul 2012 14:11:48 +0000
Hi Peter, I am not sure where you got that information but I think it is wrong. Here you can see the Andrew Heliax 1 5/8 LDF7-50A datasheet. there you can read: 30 MHz Average Power 30.86 Kw (Page 3)
/archives//html/Amps/2012-07/msg00190.html (10,979 bytes)

16. Re: [Amps] corona on a quad (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Fri, 13 Jul 2012 14:16:18 +0000
Sorry, the link for the datasheet; http://www.rfparts.com/pdf_docs/AndrewHeliax/LDF7-50a.pdf http://www.rfparts.com/pdf_docs/AndrewHeliax/LDF7-50a.pdf _______________________________________________
/archives//html/Amps/2012-07/msg00191.html (10,658 bytes)

17. Re: [Amps] Most power ever run on amateur radio :-) (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Wed, 19 Dec 2012 20:22:15 +0000
Hi all, I know a few stations running around 100 Kw in CB 27 MHz keydown contest, mobile and fixed. They use 3 x 3CX20.000 and 2 x 3CX20.000There are even more stations around 40 Kw (just one 3CX20.0
/archives//html/Amps/2012-12/msg00113.html (10,740 bytes)

18. Re: [Amps] Russian caps (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Thu, 14 Mar 2013 15:36:33 +0000
Hi Carey, Have a look at next link; http://www.ur4ll.net/ May be useful for you. 73, Maximo - EA1DDO _______________________________________________ Amps mailing list Amps@contesting.com http://lists
/archives//html/Amps/2013-03/msg00199.html (8,526 bytes)

19. Re: [Amps] GS-35B Pi Tank design (score: 1)
Author: Máximo EA1DDO_HK1H <ea1ddo@hotmail.com>
Date: Thu, 9 May 2013 14:11:09 +0000
Hi Iain, Please, check this piece of software called GGridPA It is very useful. 73, Maximo - M0HAO _______________________________________________ Amps mailing list Amps@contesting.com http://lists.c
/archives//html/Amps/2013-05/msg00134.html (10,700 bytes)

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