protector fuse for ctc15 flyback

[ctc17]

A few thoughts on this.

Flybacks usual failure mode is arcing in the secondary doughnut. My conclusion is this is due to wax loss and insulation failure from heat.

I leave the cage open on all my sets now and just avoid siting close to them. If you smoke or the set is in a dusty or humid area I would keep it closed.

Fuses are worthless because the thing runs and 200ma and the tube melts at 300ma. For this reason a 250ma chemical fuse must be used. (very hard to find) A regular AGC style fuse will have excessive drop and run hot eventually failing.

I have experimented with this and melted down the tubes never blowing the fuse. It may save you if the damper were to short or something catastrophic like that.

Lower the line voltage. This makes a HUGE difference in the amount of heat and life of everything. 108 seems to be a good number.

Dont stress it, those flybacks are substitutable with a little research and work.