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References: [ +from:oz7c@cool.dk: 13 ]

Total 13 documents matching your query.

1. Re: [Amps] AL-1200 (score: 1)
Author: "Boye Christensen" <oz7c@cool.dk>
Date: Tue, 19 Oct 2010 19:58:30 +0200
Hi to all What does the say abt HV ?? I'll say take the tube out and check the pin connections Schematics on the internet. 1. if g1 shorten to filament 2 Are both ends of filament connected 3 There i
/archives//html/Amps/2010-10/msg00301.html (17,390 bytes)

2. [Amps] Fw: 6kW Coax (score: 1)
Author: "Boye Christensen" <oz7c@cool.dk>
Date: Sun, 11 Mar 2012 09:55:03 +0100
David Out from schematics You can short the two lines before the LP filter and redesign the LP filter 37 Ohm to 50 Ohm ?? 73 Boye _______________________________________________ Amps mailing list Amp
/archives//html/Amps/2012-03/msg00114.html (7,645 bytes)

3. [Amps] Fw: 6kW Coax (score: 1)
Author: "Boye Christensen" <oz7c@cool.dk>
Date: Sun, 11 Mar 2012 14:07:16 +0100
There is another way to do it convert it down and up Use of 50 Ohm coax Take 2 x 50 Ohm in paralell = 25 Ohm 1/4 Labda this gives 12.5 Ohm connect then toghter 6.25 Ohm then 3 x 50Ohm = 17.Ohm 1/4 la
/archives//html/Amps/2012-03/msg00117.html (10,912 bytes)

4. Re: [Amps] Choke input filters, design criteria? (score: 1)
Author: "Boye Christensen" <oz7c@cool.dk>
Date: Wed, 26 Dec 2012 11:46:32 +0100
Hi to All I'll have designed Power supply in many years mostly Switch mode Power and in low power. I decide to run some LT-spice simulation on it to find out what what the best type ? Design 4KV 1Amp
/archives//html/Amps/2012-12/msg00180.html (13,875 bytes)

5. Re: [Amps] "need zener' (score: 1)
Author: Boye Christensen <oz7c@cool.dk>
Date: Tue, 03 Feb 2015 19:34:42 +0100
Hi to all Last time i neded a 50W Zener for repair of an amp AL1200 i did buy it from Farnell, and I've just checkit they still have them ! 73 Boye OZ7C Den 03/02/2015 kl. 15:24 skrev Roy: Try RF Par
/archives//html/Amps/2015-02/msg00029.html (7,227 bytes)

6. Re: [Amps] Date Code Samsung 120 MFD 450 Volt Capacitors? (score: 1)
Author: Boye Christensen <oz7c@cool.dk>
Date: Mon, 11 May 2015 21:47:24 +0200
Hi If they are old make an EXT. circuit with soft start to test each, e.g a diode with 100 kOhm in series. Use a DMM to measure time /voltage and calculate capacitance. 230 VAC to a diode gives app.
/archives//html/Amps/2015-05/msg00107.html (9,493 bytes)

7. Re: [Amps] Need a dead 8877 Tube for layout/blower tests (score: 1)
Author: Boye Christensen <oz7c@cool.dk>
Date: Sun, 12 Jul 2015 10:52:39 +0200
Hi The tube amp I know that have a very low noise level was TEN TEC Titan with 2 x 3CX800 tubes and also Heatkits SB220 with 2 x 3-500Z has low level, but not as low as Titan. 73 Boye OZ7C Den 12/07/
/archives//html/Amps/2015-07/msg00033.html (8,100 bytes)

8. Re: [Amps] Super Cathode Driven Tetrodes (score: 1)
Author: Boye Christensen <oz7c@cool.dk>
Date: Wed, 31 Oct 2018 18:33:22 +0100
Hi Can't any reason to drive a tetrode from catode ! How to control G2 voltage ? This will act as modulation of G1 + G2 G2 voltage has a big infunce on PWR out of a tetrode ! Most companies using tet
/archives//html/Amps/2018-11/msg00002.html (10,717 bytes)

9. Re: [Amps] SS Amps are expensive...why? (score: 1)
Author: Boye Christensen <oz7c@cool.dk>
Date: Sat, 26 Jan 2019 06:25:31 +0100
Here is a video of the water cooled russian version https://www.youtube.com/watch?v=f0iGNVzkt8k 73 Boye Too bad the site doesn't list prices and how to order one. 73, Dick, W1KSZ On Thu, Jan 24, 2019
/archives//html/Amps/2019-01/msg00142.html (11,631 bytes)

10. Re: [Amps] HV rectifier diodes (score: 1)
Author: Boye Christensen <oz7c@cool.dk>
Date: Mon, 28 Jan 2019 14:22:18 +0100
Hi I did replace in my SB220 think it was in before 2000 1 Amp diodes 1N4007 with 3 Amp diodes 1N5408 1/2 $ a pice They are still working ! 73 Boye OZ7C On 26/01/2019 20:38, Art wrote: Hi All, When I
/archives//html/Amps/2019-01/msg00152.html (8,526 bytes)

11. Re: [Amps] SS Amps building a water cooled (score: 1)
Author: Boye Christensen <oz7c@cool.dk>
Date: Thu, 7 Feb 2019 19:41:34 +0100
Hi here is a youtube video how to building a SS AMP https://www.youtube.com/watch?v=2d_rkfj05mI 73 Boye -- Denne e-mail blev kontrolleret for virusser af Avast antivirussoftware. https://www.avast.co
/archives//html/Amps/2019-02/msg00028.html (7,286 bytes)

12. [Amps] Fwd: Re: Removing grid shorts (score: 1)
Author: Boye Christensen <oz7c@cool.dk>
Date: Mon, 3 Jun 2019 17:08:24 +0200
Hi to all This is the normal life out time of tubes If the tubes is open after some time of warm up there might bee a change to repair ! How to repair will bee  different of tube type (life time exte
/archives//html/Amps/2019-06/msg00010.html (12,104 bytes)

13. Re: [Amps] Econco Tube rebuilding (score: 1)
Author: Boye Christensen <oz7c@cool.dk>
Date: Wed, 29 Jan 2020 03:31:37 +0100
Hi RFparts has a rebuilding process for 895$ https://www.rfparts.com/catalogsearch/result/?q=3cx1200A7 It might be a better idea to use 3CX1200Z7 tube this need new components in the Amps 73 Boye On
/archives//html/Amps/2020-01/msg00043.html (7,932 bytes)

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