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References: [ +from:pc5m@xs4all.nl: 9 ]

Total 9 documents matching your query.

1. Re: [Amps] PSU design question (score: 1)

Author: "pc5m, Carel" <pc5m@xs4all.nl>

Date: Fri, 6 Nov 2009 20:04:38 +0100

Ulf, If you use a small valued resistor for the sake of measuring grid current in a triode grounded grid configuration and as such make sure the voltage drop over that resistor is smaller as 0.5V und

/archives//html/Amps/2009-11/msg00086.html (9,816 bytes)

2. Re: [Amps] HV PS transformer (score: 1)

Author: "pc5m, Carel" <pc5m@xs4all.nl>

Date: Thu, 12 Mar 2009 09:12:43 +0100 (CET)

Hi Marv, Do you remember which kind/type of rectifier diodes you have been using ? Did do some research and found some ultra-fast diode's (trr < 30ns) with decent reverse voltage (600V), but would be

/archives//html/Amps/2009-03/msg00341.html (9,937 bytes)

3. Re: [Amps] switchable zener cathode bias (score: 1)

Author: "pc5m, Carel" <pc5m@xs4all.nl>

Date: Wed, 31 Dec 2008 10:26:03 +0100

Hi Steve, I suppose you use a low power zener and 2n3055: If you just connect via a relay of single pole switch the lower valued zener in parallel with the higher voltage zener all would be fine. Gl,

/archives//html/Amps/2008-12/msg00380.html (9,120 bytes)

4. [Amps] High grid current and No kathode current, known triode failure mode ? (score: 1)

Author: "pc5m, Carel" <pc5m@xs4all.nl>

Date: Sun, 26 Oct 2008 21:32:52 +0100

Hi, Al of a sudden I experience with my gs35b triode amplifier the condition of High (200mA) grid current and NO kathode current when applying only PTT (do drive). Also the powersupply indicates the

/archives//html/Amps/2008-10/msg00116.html (7,778 bytes)

5. Re: [Amps] 3-500Z glitch resistor (score: 1)

Author: "pc5m, Carel" <pc5m@xs4all.nl>

Date: Tue, 9 Sep 2008 08:47:52 +0200 (CEST)

Hi, Another aproach I have seen is to signal a glitch (or any over current situation) by measuring the HV-current and fire a string of thyristors. Those thyristors are accross the HV ! and shorting b

/archives//html/Amps/2008-09/msg00067.html (19,308 bytes)

6. [Amps] mounting (UHF) RF powermodules (score: 1)

Author: "pc5m, Carel" <pc5m@xs4all.nl>

Date: Sun, 23 Mar 2008 11:38:53 +0100

Hi, Anyone could point me to some resources describing the best way to mount RF powermodules for UHF use (like the Toshiba RA13H4047). ? Did googled around a bit (found a Motorola patent, 5546275) an

/archives//html/Amps/2008-03/msg00217.html (6,915 bytes)

7. Re: [Amps] PIC processor inside HF amp (score: 1)

Author: "pc5m, Carel" <pc5m@xs4all.nl>

Date: Wed, 6 Feb 2008 10:49:44 +0100 (CET)

Not exactly HF, but it might provide some other ideas. For my VHF amp I am using for years the (fault)control (incl. TX/RX sequence) as described at: http://www.pc5m.com/projects/gs35.html Provided i

/archives//html/Amps/2008-02/msg00033.html (9,885 bytes)

8. Re: [Amps] looking for source of air flow switch (score: 1)

Author: "pc5m, Carel" <pc5m@xs4all.nl>

Date: Sat, 29 Sep 2007 18:17:28 +0200

Fern, I have used a "butchered" air inlet from a cooker hood (at least I think that is how it is called :-)) with an opto-coupler in my gs35 amp. See http://www.xs4all.nl/~kvgog/projects/gs35.html Ma

/archives//html/Amps/2007-09/msg00487.html (9,933 bytes)

9. Re: [Amps] switching power supply for tube amplifier (score: 1)

Author: "pc5m, Carel" <pc5m@xs4all.nl>

Date: Mon, 17 Sep 2007 08:10:46 +0200 (CEST)

<snip>..<snip> Hi Peter, If you are concerned with the high failure rate of silicon/IGBT's, you could also construct a real heavy switcher with...tube's....-:) gl, Carel. ___________________________

/archives//html/Amps/2007-09/msg00175.html (9,153 bytes)

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