I'm interested in LC input supplies because they have excellent power factor, but I don't like the need for big chokes. I was looking at the resonant-choke input supply described at http://www.qsl.ne
Dear Boris, The closer you look at power supply chokes, the worse the situation appears. Firstly, the sheer weight of copper and iron is daunting. Secondly, the cost of copper approaching that of gol
I intend to use it for low power, low voltage stuff. :) I asked here since it's the place most people would be familiar with resonant chokes. My main question remains: that of power factor. _________
Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>
Date: Thu, 10 May 2007 18:34:36 +0200 (CEST)
Why are you particularly worried abuot the power factor? Some simulations a colleague did some years back suggests that in fact, the choke shouldn't be resonant, but very close to it, such that the c
Peter: Resonant-chokes may be placed in the negative lead? Also, could you elaborate on the "close to it" resonance? I have a largish power supply, using a Peter Dahl resonant-choke/capacitor combina
Dear Barrie, Now you have a project! First thing: See if your choke winding has a gap. That's the big ticket hurdle, because without a gap, it can't swing. Next, use your B&K LCR meter to measure the
That is backwards. A choke without a gap will swing as the core saturates early. Most normal chokes do have a gap to keep the core from saturating and do not swing. You don't want a swinging choke fo
It doesn't matter if it is tuned choke or regular choke Gary. Without a heavy bleeder the choke acts like a hunk of wire and the cap charges to cap input filter voltages. I have 100K ohms on the supp
Actually with a gap, it swings less. Virtually any iron core choke will swing some amount with current, even those with a gap. But the gap makes the inductance be a bit more stable and the gap can a
Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>
Date: Fri, 11 May 2007 09:39:04 +0200 (CEST)
My understanding of the choke input supply is that within limits, the larger the choke, the better the regulation for any given bleed current, because the current through the choke is more constant a
pig transformer. It was an attempt to use a pole pig with a pair of small Eimac triodes. My intention was to come up with 3700 volts dc from a pole pig. I used the formula in Bill Orr's Handbook to
Ah, take it easy on him Keith, we were all kids at one point and have stupid tails to tell. Two guys I know are missing an arm from their experiences. I just have this weird tick... Tick... Tick... f
This resonant-choke discussion is crying for someone to do a Spice analysis so we can see the various waveforms. If someone will give me a schematic with relevant values I'll volunteer to give it a s
Actually it was very typical back then. The transformers were mostly 4160 RMS and only sized at 5kW or so. It was like buying a Peter Dahl soaked in fragrant oils. They had a nice radio smell. They
Good Show, Jim! Barrie _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps