Motorola TS18A

[AnthonysTV]

I have a TS18A I am restoring
I have it runing
but there is excessive noise in the video
looks like an Spurious Oscillation in the pix
I have not changed the Selenium Diodes although they apear to be working fine
there is no AC ripple on th efilter capacitors (The Oscillation seems to be much higher freq than 60 hz anyways
I did replace the 37 Ohm Resistor section of the ballast that powers the B+ to the chassis with a 37 ohm resistor 5 watt becuase it was open
the rest of the ballast seems ok
and the filaments seem normal


I will attach a pix later to show you what it looks like
I have changed all of the High Voltage Caps and this restored the pix
but now although the pix locks Horiz and Vertically there is an overlay of noise I cannot track down
but it seems to come from the H osc circuit
I have scoped the video off the sync sep and it looks clean at this point
also the noise seems to be in the raster not the video
Any help anybody can offer is greatly apreciated
The unit is missing the cover to the HV section and was wondering if that could be the cause?
I have jumped in several of the .05 caps and they make no diff in the noise
I have swapped tubes around the sync clipper and the horiz osc and the v osc
are all the same and that makes no difference in the symptom
I have a SAMS for TS18 seems close enough to work with
The pix is bright crisp and in focus
just too much noise over top of it
and if you tune to blank station the noise is there