Motorola 17T21 Flyback & Schematic

[Mre12ax7]

By the way would anyone have any knobs for this set?
All knobs are missing with the exception of the power/volume.

[Mre12ax7]

How would I go about adding a dropping resistor to bring the B+ back to the spec 250v after replacing the selenium rectifiers. Should I just add in a 100 ohm 5w resistor or similar after the diodes?
Something like this?

[Mre12ax7]

I have placed a order at Mouser for some capacitors for the set.
The transformer has been recoated with the silicone.
I will solve the dropper resistor problem after the set is recapped and working using Ohms law.

[Mre12ax7]

Is this yoke salvageable?
It will have to have a new cover made for the back at the very least.
The rotted portion goes deep inside between the coils and 4 pieces of metal, which when I removed the clamp to remove most of the rust they all fell off of the degraded plastic core.
Two of them now have small chips from when they fell out (i have the pieces) because the edge of the plastic is warped.
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[Kevin Kuehn]

If you still have the centering rings you could make a new back cover to hold them. Most aftermarket yokes won't include those rings or the correct cover to hold them.

[Mre12ax7]

I finished recapping the set.
So I tried powering it up. No luck.
No picture, no HV static in speaker when you turn the volume control.
after about a minute and a half I noticed the horizontal output tube was glowing blue so I shut it off.
The output, damper and HV rectifier tubes are all good. Horiz, osc tube tested weak so I swapped it around with the other 6SN7 in the set (I do not have spares).
I have moved all the controls on the back including the horiz hold potentiometer before powerup.
Should I try to mess around with that?

P.S Can a moderator please change the name of this thread to Motorola 17T21 Restoration (I don't see a way to do it myself)