[time-nuts] The home time-lab

Bill Hawkins bill.iaxs at pobox.com
Sun Jul 24 22:36:55 EDT 2016

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

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

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: 

73, K6UHN Alex

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