| Findm-Keepm |
05-09-2017 08:18 PM |
Quote:
Originally Posted by cluelessgame
(Post 3183622)
Here are the pictures of the antenna as mounted inside the cabinet. It appears that there is some sort of sheath insulator it collapses into. I think there is a little grommet at the top that'll let me take it off and put it on another one.
Looking closer at the UHF tuner it appears something internal has indeed broken as the outer shaft also turns continuously.
Findm-Keepm PM me your info so I can send you postage fare, I'd really appreciate those parts.
I tried injecting a weaker signal and it didn't really help things. checked all the resistors around the Horiz AFC and they all appeared to be in spec. I've also included a pic of the disk cap that looks suspicious. I maybe should emphasize that this issue also affects vertical linearity too, yet all the resistors around the sync separator are in spec as well. speaking of the vertical, I failed to mention previously that the vertical hold pot stem has broken off. luckily its stuck in a position that locks on, but it appears that replacing it will mean i'll have to replace the vert. height and linearity controls too as all three are contained in a housing that clips in. I've toyed with the idea of maybe trying to glue something onto the nub and hope it stays, but I'm not sure what kind of adhesive to use (JB weld?), as well as what to glue to it.
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PM me your address - I'll get the antenna and the knobs out to you ASAP. The ceramic cap looks ok - the caps are sprayed with a waxy substance to make them move through the automatic insertion equipment, and the wax can "boil off" if too close to a tube. RCA, in their field service seminars would recommend cleaning all ceramic discs in IFs, Sync and Oscillator circuits with naptha (lighter fluid) to remove the wax. If too much accumulated between the leads, it could affect the value of smaller value capacitors.
Also remember that an engineer specified that cap and it's temperature coefficient for that spot on the board. As to sync, have you replaced any AFC diodes? If not, we always replaced them as a preemptive measure. You can use any 1N914, 1N3064, 1N4148, or similar switching diode. Cheap, and good insurance against a call-back.
As to the vertical hold control, I have many Striptrols, and about 30-40 New-in-package ones for GE. I'll check the part number in my Sams and see if I have one - same story, yours for postage only. I've got two TV shops AND a distributor's GE inventory (all post '65 parts...), so I'm set for specific GE parts. I long ago got rid of the generic stuff - caps, CRTs, resistors, crystals, lamps, fuses and non-GE marked semiconductors... |
