| Tubejunke |
01-16-2017 03:10 AM |
Quote:
Originally Posted by Jon A.
(Post 3173226)
Now, if someone can give me highly detailed specs on Zenith's infamous horizontal efficiency coil, perhaps I can practice making duplicates with coils from my junk boards.
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I would have and many vintage Zenith owners WILL wish that someone gets those specs and starts making them because they are nearly unobtainium and the spools are brittle and broken on many sets. If the slug freezes in a brittle spool it is DONE!
I have a 1964 Zenith metal cabinet job that a while back was familiar to this forum due to both that and a popped resistor under an arching (to the point of ruin) HV rectifier socket.
I finally found a coil and a socket, but it wasn't easy. And understandably there weren't a lot of enthusiasts with spare chassis wanting to sell off vital parts. Someone finally came to the rescue with the rectifier socket and for the record, the resistor isn't even necessary. Can't remember why to explain, but a very reliable source told me to run a jumper where the resistor was and all would be well. And it was. :thmbsp:
I still have the set, but the project got put to the side by the acquisition of a new woman and all of her (MANY) belongings. No room to pull a TV chassis, so I shifted my interests to restoring old test equipment like Heathkit C3s, Sprague TelOhmikes, and Solar stuff. The type that test for leakage at full rated voltage. Great, if not essential for people doing what we do here at VK and NO a modern DVOM with capacitance WILL NOT tell you the condition of any capacitor; only the uuf or uf value with it's 9V battery.
Don't want to go off topic so yes the set sits waiting for it's day in the sun of the right buyer. It works pretty good. Needs a little convergence work and I run it on my Variac with a milli ammeter hooked up to the cathode of the horizontal output tube to keep an eye on the current. I don't want to lose a flyback! The current gets a little higher than I feel good about at full wall potential, so I need to replace a few caps in that circuit and all will be fine. |
