Color me clueless but... - Videokarma.org TV - Video

Jon A. · #1 05-10-2014, 02:58 PM

What is this thing? It was in the HV area of a junked Hitachi console, attached to the flyback only by that short piece of wire as I recall. One hold-down point I had to break off as it had fused itself to the chassis. Taking the screw out did nothing to free it.

Electronic M · #2 05-10-2014, 03:38 PM

Looks like a flyback transformer to me.

jr_tech · #3 05-10-2014, 03:50 PM

Is this a trick question? I can tell you that without a doubt, a flyback transformer *is* indeed attached to the little short wire.
jr

Jon A. · #4 05-10-2014, 04:09 PM

Quote:

Originally Posted by jr_tech

Is this a trick question? I can tell you that without a doubt, a flyback transformer *is* indeed attached to the little short wire.
jr

No trick, I'm just not used to taking apart sets that old. What I believe was the flyback had a really odd-shaped housing. The 2nd anode lead was coming off that one. Were there ever two-piece flybacks?

VintagePC · #5 05-10-2014, 04:20 PM

Quote:

Originally Posted by Jon A.

No trick, I'm just not used to taking apart sets that old. What I believe was the flyback had a really odd-shaped housing. The 2nd anode lead was coming off that one. Were there ever two-piece flybacks?

I've seen two-piece jobbies in more recent (90s) colour monitors...

jr_tech · #6 05-10-2014, 04:45 PM

The second unit was likely a *tripler* module consisting of a potted assembly of HV diodes and capacitors that takes the AC output from the flyback transformer and produces stepped-up, filtered DC voltage for the second anode of the CRT.
jr

Jon A. · #7 05-10-2014, 07:02 PM

I'm guessing that such a tripler wouldn't be safe to use if the 2nd anode wire had been cut and spliced, as was the case with this set. The thing was in such sorry shape I decided to part it out when I found that. I didn't notice it for a while as the wire had some sort of black tape running most of its length aside from the electrical tape, the former looking like a factory job.

Electronic M · #8 05-10-2014, 07:27 PM

You could probably have coated the splice with a decent blob of silicon caulk and stopped all arcing/corona.

Jon A. · #9 05-10-2014, 08:21 PM

Thanks, I'll keep that in mind. It wasn't a desirable set to me anyway. If only I had a way to test the delta gun CRT I saved from it.

old_coot88 · #10 05-10-2014, 08:22 PM

Sounds like he posted a picture of the wrong part.
That said, the lack of a filament winding on the xfmr suggests the "mystery part" was not a not a tube but a tripler.