Search String: Display: Description: Sort:

Results:

References: [ +from:df3kv@t-online.de: 314 ]

Total 314 documents matching your query.

21. Re: [Amps] new mobile amps from THP (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Wed, 11 Jan 2006 15:48:33 +0100
Also no problem with the SS750 in a BMW325 and VW GolfII 73 Peter Bill, Using a Henry SS750 @ 1100 watt output in my 2005 Toyota I do not have any issues concerning RFI to the cars electronics. Most
/archives//html/Amps/2006-01/msg00336.html (9,686 bytes)

22. Re: [Amps] GS-35B Vertical Mounting & Input Impedance (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Fri, 13 Jan 2006 03:34:09 +0100
Hi Mike. Tubes with external anodes need plenty of air flow as well as back pressure. I converted an AL1200 to GS35B and found the original blower insufficient to cool that tube. Don&acute;t forget t
/archives//html/Amps/2006-01/msg00362.html (12,392 bytes)

23. Re: [Amps] Capacitor wanted (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Sun, 15 Jan 2006 20:07:39 +0100
with a Pi-L circuit 500V are not enough 73 Peter, DF3KV How much power you planning on running? 500 volts should be enough for that. 73 Gary K4FMX Need a 1500 pF or more variable for load cap, 1500 w
/archives//html/Amps/2006-01/msg00389.html (8,742 bytes)

24. Re: [Amps] Capacitor wanted (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Sun, 15 Jan 2006 20:24:55 +0100
A spark gap on the output is helpful against wrong or lost antennas. 73 Peter ORIGINAL MESSAGE: that. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1500 watts. 500 would be enough unless somebody
/archives//html/Amps/2006-01/msg00392.html (8,438 bytes)

25. Re: [Amps] fan experts (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Sun, 29 Jan 2006 14:40:33 +0100
I use those EBM blowers with my amps for 30 years, I never had Problem. I select them much larger then necessary and use a variac to reduce the speed, they are extremely quiet then. http://www.ebmpap
/archives//html/Amps/2006-01/msg00680.html (9,018 bytes)

26. Re: [Amps] fan experts (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Sun, 29 Jan 2006 15:43:22 +0100
Rich, Variacs are offered as option by EBM and Gebhard, the other large manufactur, especially for that reason: have the speed fully adjustable from zero to 100%. Look at the application in EBM catal
/archives//html/Amps/2006-01/msg00682.html (8,244 bytes)

27. Re: [Amps] fan experts (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Sun, 29 Jan 2006 21:20:29 +0100
They are capacitor-run motors, What should be a reason not to use the variac? The capacitor just shifts the phase. 73 Peter With a shaded pole motor, lowered V is okay, with a capacitor-run motor, it
/archives//html/Amps/2006-01/msg00699.html (9,153 bytes)

28. Re: [Amps] What blower? (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Tue, 31 Jan 2006 20:31:47 +0100
At 91 cfm back pressure is 0.25", it is 0.7" at 55 cfm. Better for a GS35 is the model G2S-108 with 0.6" at 100 cfm. 73 Peter --Original Message-- From: amps-bounces@contesting.com [mailto:amps-bounc
/archives//html/Amps/2006-01/msg00773.html (11,076 bytes)

29. Re: [Amps] Pi vs Pi-L (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Wed, 1 Feb 2006 19:48:08 +0100
Mike, How much better will be Q and how much less will be losses by silverplating HF tank components? On 2m amps I measured no difference at all before and after plating 73 Peter Silver plating of th
/archives//html/Amps/2006-02/msg00011.html (7,713 bytes)

30. Re: [Amps] Amp for sale on eBay (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Fri, 3 Feb 2006 01:21:40 +0100
With sweep tubes like 4xPL509 or 6KD6 the usual output was 1KW, seems to be a quit inefficient amp. DJ4ZC and others did 6KW with 5xPL509 in his class D amp using L.Kahns "Envelope Elimination and Re
/archives//html/Amps/2006-02/msg00038.html (10,487 bytes)

31. Re: [Amps] Here's something you don't see every day (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Thu, 16 Feb 2006 03:25:41 +0100
How do you know the modified amp was a perfectly good amp before? And how do you know it is a piece of junk now? I did not see any inside view to have such meaning about it, Might be a nice 10, 17m o
/archives//html/Amps/2006-02/msg00277.html (9,396 bytes)

32. Re: [Amps] 87A vs. IC-PW1 (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Thu, 23 Feb 2006 23:37:41 +0100
With the Bugatti Veyron you may go faster then 400km/h if you like, but with your linear you are limited to 750W PEP in Germany 73 Peter No idea if it's legal in the USA and its Territories. I know t
/archives//html/Amps/2006-02/msg00469.html (9,148 bytes)

33. Re: [Amps] GS35B glowing ceramic TSPA (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Fri, 24 Feb 2006 19:33:03 +0100
I never saw any metal ceramic tube not glowing and I think it is caused by the electron bombardment, not by X-ray. Even my class A driver, a 4CX350A at 1500V anode voltage does it 73 Peter John and A
/archives//html/Amps/2006-02/msg00508.html (12,885 bytes)

34. Re: [Amps] GS35B glowing ceramic TSPA (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Fri, 24 Feb 2006 19:35:23 +0100
The bombardment is towards the anode, not to the ceramic. Actually what is seen is imho the electron flow 73 Peter ORIGINAL MESSAGE: <http://gs35b.com/gs35b/bang.html> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/archives//html/Amps/2006-02/msg00509.html (8,361 bytes)

35. Re: [Amps] figuring tube output impedance (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Mon, 27 Feb 2006 23:13:28 +0100
The output impedance will be around 1100 ohms in class AB1. I considered a DC anode voltage swing of 3,5KV and conduction angle of 180&deg; 73 Peter I see a lot of formulae(is that plural???) on dete
/archives//html/Amps/2006-02/msg00647.html (8,973 bytes)

36. Re: [Amps] Boat-Anchor Cleanliness (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Wed, 15 Mar 2006 22:07:17 +0100
I cannot agree on that, I washed my Collins 51S1 and my Drake Twins 2 or 3 times in the dishwasher without any problem so far. The only parts I removed before were the meters. The Drake I own now for
/archives//html/Amps/2006-03/msg00403.html (8,384 bytes)

37. [Amps] tube cooling requirements (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Fri, 17 Mar 2006 13:32:40 +0100
Hi all, when using tubes in parallel, how are the cooling requirements? Do the data sheet values for cfm and back pressure have to be doubled or just the cfm value? 73 Peter _________________________
/archives//html/Amps/2006-03/msg00487.html (6,834 bytes)

38. Re: [Amps] low cost IRF-MOSFET amps...... (score: 1)
Author: "peter.voelpel" <df3kv@t-online.de>
Date: Sun, 19 Mar 2006 12:59:44 +0100
The design by DL9AH is modified in the meantime, it does 1KW. At present there is group of hams busy with it to have 4 of those modules combined in parallel 73 Peter Hello, Anybody out there with exp
/archives//html/Amps/2006-03/msg00539.html (7,881 bytes)

39. Re: [Amps] working backwards to setup tank (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Wed, 19 Apr 2006 00:42:39 +0200
Hi Chuck, if I remember right you are running 3.9KV at the anode, 3.5KV under load. With 500W output you have most likely not more then 250mA anode current. That results into an impedance of almost 8
/archives//html/Amps/2006-04/msg00292.html (9,465 bytes)

40. Re: [Amps] Strange power supply (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Thu, 20 Apr 2006 03:22:29 +0200
Sounds that you lost a diode string. Is that a rectifier bridge or a doubler circuit? 73 Peter I recently boxed-in my all-purpose power supply with thin panels of wood, in order to protect the cats,
/archives//html/Amps/2006-04/msg00304.html (8,755 bytes)

Current List: 21 - 40
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16]
This search system is powered by Namazu