View Full Version : Need help wiring replacement HVO-7 flyback

06-24-2017, 12:40 PM
Hi folks... I need some help understanding the changes to wire in a replacement flyback in my set. I thought I had it but I'm now confusing myself the more I think about it, so some expert advice would be welcome.

Schematic (with wires to off-image things labelled) and the HVO-7's "info sheet" diagram attached. If I'm understanding the replacement correctly, I need to change where the width coil is connected, as well as the damper tube plate?

Or do I just leave the circuit alone and drop in the replacement to the taps with the closest ratio of resistances?


06-24-2017, 08:11 PM
I think I'm missing pages of the Merit installation guide. It makes reference to schematic 5... so there are at least 4 more that I do not have.

Anyone have a scanned copy of the datasheet? (Merit Form 33 for the HVO-7?) Somebody on fleabay is scalping them for $20 but that's pretty rich for some paper.

Bill Cahill
06-25-2017, 09:22 PM
If is reconnecting wires, it may be doable. If you are talking rewinding, that's a very difficult to do.. Besides being very special, the windings go in, and out.

06-25-2017, 10:07 PM
Yes, just swapping one flyback assembly for another. But as noted, coil resistances differ and I am missing part of the replacement instructions.