New '60s Philco Roundie

[Hagstar]

Originally Posted by DavGoodlin

. Hope its not the Fly. Think I have a leftover diagram for a replacement fly

Why for me is it always the fly? It sure don't look healthy, and indeed reads open. Tripler time again perhaps. BUT my old pal Shango066 on youtube claims one can easily substitute another fly. 3AW2 is shattered at base, note soot.

The horz. output section seems to be intact but fly "tire" is open. But there's no horz. output voltage either so without a high voltage fuse what's also blown up I wonder?

[DaveWM]

Originally Posted by Hagstar

Why for me is it always the fly? It sure don't look healthy, and indeed reads open. Tripler time again perhaps. BUT my old pal Shango066 on youtube claims one can easily substitute another fly. 3AW2 is shattered at base, note soot.

The horz. output section seems to be intact but fly "tire" is open. But there's no horz. output voltage either so without a high voltage fuse what's also blown up I wonder?

how are you checking the open on the fly? IIRC that is a little funky, like the tire HV is isolated from the rest of the windings with some high resistance power resistors. Start from the anode of the focus rectifier (pin 6 of the fly) to the plate lead for the HV tube. 540 ohms

[Hagstar]

Originally Posted by DaveWM

Start from the anode of the focus rectifier (pin 6 of the fly) to the plate lead for the HV tube. 540 ohms

This reads a steady 109 megaohms.

John H.