[ARC5] BIG Variacs and popping breakers.

[Bruce Long]

The series dropping capacitor is a good and under utilized trick.   But be aware it is possible to hit series resonance with  an inductive load in which case you get the opposite of voltage dropping.


      From: Brian <brianclarke01 at optusnet.com.au>
 To: J Mcvey <ac2eu at yahoo.com>; Scott Johnson <scottjohnson1 at cox.net>; 'KR44OJ' <kr44oj at charter.net>; arc5 at mailman.qth.net 
 Sent: Sunday, December 11, 2016 4:20 AM
 Subject: Re: [ARC5] BIG Variacs and popping breakers.
   
Hello John, For a cooling fan rated at 110 Vac but running off 230 Vac, I put a 0.5 uF capacitor in series. I can’t really give you a definite capacitor value for radios – which radios, what power consumption, what Voltage drop? Easy to arrive at with my little capacitor box and a Voltmeter across the powered item. 73 de Brian, VK2GCE. On Sunday, December 11, 2016 3:27 PM, John asked: The right types can also  be found in an old microwave power supply ( with 50-60hz supply).I think they were in the 1 uf range .
What values do you use a lot for the radios?
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