[time-nuts] The home time-lab

Alexander Pummer alexpcs at ieee.org
Mon Jul 25 00:08:06 EDT 2016

you could bring the horse to the well.....

On 7/24/2016 7:36 PM, Bill Hawkins wrote:
> Years ago I knew exactly how Sola regulators worked. That has faded, but
> what remains is that the regulation was done by varying the saturation
> of the core. That's why there is a slot in the laminations. I find it
> hard to believe that a partially saturated core can produce zero
> harmonics.
> In any event, the LC circuit does not filter anything. Possibly the
> circuit counteracts the change in saturation as the line voltage
> changes. I wouldn't expect it to effect the high frequency components of
> spikes.
> Any power supply that has a diode bridge and capacitor to create DC only
> draws power from the line at the voltage peaks, when the diodes become
> forward biased. I don't know of any choke input supplies, as were used
> to reduce the peak current of vacuum tube rectifiers.
> I know nothing about power factor correction for a bridge and capacitor,
> whether or not it is followed by a switching regulator.
> Make of it what you will.
> Bill Hawkins
> -----Original Message-----
> From: Alex Pummer
> Sent: Sunday, July 24, 2016 7:29 PM
> That is interesting, since the Sola device has a to the line frequency
> tuned tank circuit in it, thus the output should not have to many higher
> harmonics and should look reasonable close to sinusoidal see here:
> http://www.rdrelectronics.com/russ/jun16/vs2.PDF
> 73, KJ6UHN Alex
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