CROSS Pattern Line Width

[chf1971]

Sencore model VA62 Video Analyzer Test Equipment with VHF Channel 03 injection with CROSS Pattern into a different TV on Channel 03. The Vertical Line is wider, as well.

images, attached.

[chf1971]

Philco Predicta Debutante

OTA -> DTV Converter Box -> Sencore VA-62 external modulation - > Sencore VA-62 46.75 MHz I.F. -. Philco Predicta Video First I.F. Stage.

Images, attached.

[Notimetolooz]

The VA62 has an adjustment for vertical line width which also effects the dot width.
Be aware that the more units the signal goes through on it's way to the TV the more the video can be smeared.
Try the Multiburst pattern from the VA62, the buttons will turn each bar on or off. If you can see lines in the 2.5MHz bar that is good enough.
The Multiburst bar use a different circuit than the crosshatch pattern.

[chf1971]

Thank You Notimetolooz -

I took a look at the 2.5 MHZ on the Multiburst Wave Pattern injected at Video I.F. Board Front End. It looks fine.

I always intended this PHILCO Restoration to be minimal, up to the point to get the TV Set, generally operational.

With the DTV Converter Box Over The Air Programs that I have viewed on the set, it appears acceptable. I have had the Sencore VA-62 patterns displayed on the unit for 4+ hours operational time, continuously. Now, decision time - how much further to go on this unit.

[zeno]

Hint for generators especially on color sets.
Always run the brite & contrast low. This will give the
cleanest display.

73 Zeno
LFOD !

[chf1971]

Originally Posted by zeno

Hint for generators especially on color sets.
Always run the brite & contrast low. This will give the
cleanest display.

73 Zeno
LFOD !

Agree . I have recently noticed the same, only with the Sencore VA62.

[Tube TV]

Originally Posted by chf1971

Philco Predicta Debutante

OTA -> DTV Converter Box -> Sencore VA-62 external modulation - > Sencore VA-62 46.75 MHz I.F. -. Philco Predicta Video First I.F. Stage.

Images, attached.

Looks OK, but really soft. Like any video above 2 mhz or so is being clipped. Have you tried out the picture after the video detector? If it's clear there then you could work your way back through the IF, or if it's still soft then you know that you need to work on the video amp.

I'd change all the wax paper caps in the IF strip if they haven't been done yet as they are going to be leaky and it wouldn't take much to have those out of the way.

I'd get the tuner connected also. I doubt there's anything wrong with it beyond maybe some dirty contacts.