My Brand New CTC-7! - Videokarma.org TV - Video

SwizzyMan · #1 07-19-2015, 08:14 PM

Seems that just tv shows mainly mess with the horiz and vert hold but the crosshatch and the alignment patterns are somewhat better but still iffy with the holds. The color bar patterns are a lot more stable. Could this be bad caps or a coil adjustment?

Phil Nelson · #2 07-20-2015, 12:09 AM

Wiggling a tube is only a temporary cure for a situation where a tube has dirty/corroded pins, or its socket has dirty/corroded connectors, or both. Have you every tried cleaning them? See http://antiqueradio.org/FirstStepsInRestoration.htm . If wiggling a connector makes things better and worse, that connection needs to be cleaned or resoldered, whichever is appropriate.

Phil Nelson

DaveWM · #3 07-20-2015, 07:31 AM

Quote:

Originally Posted by SwizzyMan

Seems that just tv shows mainly mess with the horiz and vert hold but the crosshatch and the alignment patterns are somewhat better but still iffy with the holds. The color bar patterns are a lot more stable. Could this be bad caps or a coil adjustment?

Start with what Phil said, find the intermittent connections and correct.

DO NOT ADJ ANY COILS if you do all bets are off.

DaveWM · #4 07-20-2015, 07:41 AM

also for now stop using the BT, use the RF out from a reg DVD or converter box.

SwizzyMan · #5 07-20-2015, 07:43 AM

So for sure that is what is causing the bad horiz and vertical hold? I think some of that power transformer wax has dripped onto some tube sockets the underside of the socket where the solder joints are. Could that be causing problems?

DaveWM · #6 07-20-2015, 07:58 AM

more likely the RF source which is why I keep asking you to change it.

SwizzyMan · #7 07-20-2015, 08:03 AM

Alright sorry just wanted to make sure there was not going to be any further problems with that wax. I'll take it out today and do what I can.

DaveWM · #8 07-20-2015, 08:15 AM

as previously stated, you need to make sure tube sockets are clean esp since it seems they maybe part of the intermittent video signal.

One issue at a time, get that worked out 1st then next will be the horz/vert lock issues.

My guess is you have an AGC or sync separator issue (or a signal issue from the RF source), there are many causes for this, but again FIRST get the intermittent issue worked out.

you should not have to worry about just touching a wire or a tube and have that cause a problem.

on and DONT squirt cleaning solution all over the sockets, esp the tuner. Rather pull the tube out spray the pins, then insert the tube several times. Most times that is all that is needed to clean the socket. Look at the pins of the tube if corroded use fine (500 grit) paper to clean off or use a brass bush.

on really bad sockets I use carb cleaning spiral brushes (soaked with cleaner/lube) to clean out. BUT you don't want to use too large a brush and risk opening up the little socket holes.

SwizzyMan · #9 07-20-2015, 09:44 AM

Ok got the intermittent signal issue fixed by cleaning the tuner tube pins. The signal is now there but still not all that great in picture quality I'm hoping it just needs a focus adjust. The horizontal hold loses sync about a minute after I adjust it correctly. Here are the screen pictures scroll down to the end of the page. http://imgur.com/a/oTaRJ