Yoke Voltage

[rtw]

Putting together a yoke flipper.

I know the rule is to flip with the monitor off

Anyone know how much voltage is present on the yoke wires and how much the current drain is ? Need to dimension the 4PDT properly.

 

[MKL]

It depends on the CRT size. For 25" (59cm viewable) CRTs the values for the horizontal yoke (which is the more power hungry of the two) are between 4 and 5A:

For 28" CRTs (66cm viewable) values are similar:

For 29" CRTs (68cm viewable) the horizontal yoke current is above 5A:

Horizontal yoke voltage for bigger CRTs (25"-29") is at least 1200Vpp. Just look at the collector-emitter ratings for the various HOTs (and capacitors connected to it), they're usually 1500V.

 

[rtw]

Thank you MKL, much appreciated

One question, when switches are specified they give the voltage/current.

Is this the max voltage/current when they switch on a live circuit ?

I was thinking of using a 4PDT rated at 125V/2A but only switching when the monitor is off.