Search String: Display: Description: Sort:

Results:

References: [ +from:thomas.hoeppe@asamnet.de: 18 ]

Total 18 documents matching your query.

1. [Amps] Screen voltage regulation (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Wed, 12 May 2004 20:34:48 +0200
Hello guys, I am new on this reflector, so may be I am asking a question whitch has been discussed before. I am looking for a simple design for the regulation of a screen supply. I need 800V and abou
/archives//html/Amps/2004-05/msg00120.html (7,142 bytes)

2. [Amps] FL2100Z VHF surpressors failure (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Sun, 6 Jun 2004 19:37:27 +0200
Hello amp specialists, at my home QTH I am using a small Yaesu FL2100Z amplifier since some months. I like this quiet little box, as 500W is the maximum I can run here at home. All my home made amps
/archives//html/Amps/2004-06/msg00039.html (8,113 bytes)

3. [Amps] GU35b-any experience? (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Mon, 5 Jul 2004 21:01:12 +0200
Hello freaks, I want to get in touch with people having experience with GU35b tetrodes (russian TV tubes.....GU, not GS35!) I have data sheets, what I need is people who can tell me some working para
/archives//html/Amps/2004-07/msg00023.html (6,435 bytes)

4. [Amps] Heater chokes on 1/2" ferrite (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Wed, 15 Sep 2004 19:31:36 +0200
Hello OM's, in most of the american handbooks they recommend a bifilar choke on a 1/2" ferrite rod, when the tube's cathode is in direct contact with one side of the filament or even directly heated.
/archives//html/Amps/2004-09/msg00265.html (7,166 bytes)

5. [Amps] Power metering in linears (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Wed, 6 Oct 2004 20:38:59 +0200
Hello technicians, I was adding a power meter to a new homemade linear. I used the directional coupler of the "Digital PEP Wattmeter and SWR calculator" from an old ARRL handbook (1987). I did not ge
/archives//html/Amps/2004-10/msg00066.html (7,188 bytes)

6. [Amps] Power meter in amps....TNX for the replies! (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Fri, 8 Oct 2004 20:24:12 +0200
Hello friends, thanks for all comments about building couplers for power meters. I tried lots of versions over the last days. The best results I got was using center tapped designs, but winding the c
/archives//html/Amps/2004-10/msg00094.html (6,888 bytes)

7. [Amps] Heathkit spare parts? (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Tue, 30 Nov 2004 19:26:40 +0100
Hello friends, last weekend I opened a SB220 for repair. The bandswitch had burned contacts on 10m and 15m. Maybe a simple overload, maybe VHF oszillation. Is it possible to get heathkit spare parts
/archives//html/Amps/2004-11/msg00461.html (6,666 bytes)

8. [Amps] VHF Socket for GU74b's? (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Sun, 26 Dec 2004 13:08:26 +0100
Who knows those VHF sockets, including anode-ring, chimney...They look like a SK600 for the 4CX250's.. I am looking for the name and for possible sources.... Tom, DJ5RE ______________________________
/archives//html/Amps/2004-12/msg00327.html (6,309 bytes)

9. [Amps] Mounting of SK1A sockets for GU74 tubes (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Mon, 10 Jan 2005 19:12:53 +0100
Hello ACOMS or Alpha users. The ACOMS linears use the brown bakelite SK1A sockets for the GU74b's. The sockets are mounted with 4 standoffs using the 4 "wings" on the mounting flange, so there is no
/archives//html/Amps/2005-01/msg00178.html (7,259 bytes)

10. [Amps] GU81-M on highbands (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Sun, 11 Jan 2009 07:15:25 +0100
Has anybody used a single or a pair of GU81-M on highbands? Of course I see the problems with the high output capacitance, but there can be solutions like L-tuning or a small L before between tube an
/archives//html/Amps/2009-01/msg00081.html (6,469 bytes)

11. Re: [Amps] GU81-M on highbands (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Sun, 11 Jan 2009 19:05:18 +0100
Thanks for all infos! The EX8A design is going an interesting way. If I understand it right the main trick is using L matching for the higher bands (C plate is already "in the tubes"), and the tuned
/archives//html/Amps/2009-01/msg00084.html (10,493 bytes)

12. Re: [Amps] Remote power supply question (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Wed, 18 Feb 2009 21:16:07 +0100
Tom, DJ5RE www.hoeppe.name _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2009-02/msg00552.html (10,092 bytes)

13. Re: [Amps] HELP...2x GS35b (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Fri, 16 Oct 2009 17:37:09 +0200
Hello Jean-Pierre! I am running two linears with a pair of GS35b tubes myself. You can see them on my homepage: www.hoeppe.name Your calculations are right. The more tubes you choose, the lower the p
/archives//html/Amps/2009-10/msg00231.html (13,156 bytes)

14. Re: [Amps] GS-31B (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Sat, 5 Dec 2009 06:59:20 +0100
Hello Dave! The inner structure is 100% the same. The GS35b cooler is from copper, mounting in a cone. The GS31 has diecast cooler, mounted on the flat top surface. You can use a GS31 cooler on a GS3
/archives//html/Amps/2009-12/msg00121.html (8,059 bytes)

15. Re: [Amps] Russian Power Tubes (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Wed, 16 Dec 2009 20:39:16 +0100
Hello Dave! sorry, but I can't agree in your explanations. There is strawing for sure! But I would never call it a communistic phenomenon. I use amps with 2x GS35b. It took a while and a number of tu
/archives//html/Amps/2009-12/msg00382.html (13,436 bytes)

16. [Amps] Right mounting of HV oilfilled C's? (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Mon, 4 Jan 2010 10:54:35 +0100
Hello together, HNY from Bavaria/Germany! Is it allowed to mount oil-filled capacitors "on the side", with the connectors not on top? Here why I ask: I got 3 nice oil-filled capacitors from CSI, made
/archives//html/Amps/2010-01/msg00013.html (8,253 bytes)

17. Re: [Amps] Right mounting of HV oilfilled C's? (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Mon, 4 Jan 2010 15:38:30 +0100
Hello Peter and Arne! I am afraid you are right! I replaced the damaged capacitor by the 3rd one I bought. Then I placed a mA meter from the rectifier to the capacitors. 1. The current is slightly mo
/archives//html/Amps/2010-01/msg00017.html (9,364 bytes)

18. Re: [Amps] GS-35b 2 meter amp - plate capacitor spacing from tube? (score: 1)
Author: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
Date: Fri, 11 Jun 2010 05:36:00 +0200
Hello Bill and Gerald, it is also possible that the load C is at a low value. In that case you need more C on the plate. Often, only C plate can be reached from the front, while C load is inside....a
/archives//html/Amps/2010-06/msg00119.html (10,162 bytes)

Current List: 1 - 18
Page: [1]
This search system is powered by Namazu