Philco TA505 TV

[AlanInSitges]

Man this is a great start to the new year, seeing that thing already powered up and working. Also: holy shit that thing is huge! From the earlier pics I thought it was a tabletop thing.

[Gregb]

Its not very big really, just over 3 feet tall and about 2 feet wide. It would be just about the right height on a lab bench while the operator was standing in front of it. I have it working fairly good but still have two problems to sort out. The contrast control is effective over a small area in the center of it's range and outside of that area it causes major buzz in the audio and makes the picture very unstable.
The other issue is an intermittent that comes and goes and can be initiated by tapped on the frame of the unit. It effects only the vertical and suspect maybe tin whiskers in a control.

[pdr-fml]

That's got to be the easiest to work on television ever! Definitely function over style.

[old_tv_nut]

Originally Posted by Gregb

... The contrast control is effective over a small area in the center of it's range and outside of that area it causes major buzz in the audio and makes the picture very unstable...

Is it an actual contrast control in the video out stage, or an IF gain control like some early sets?

[Gregb]

Originally Posted by old_tv_nut

Is it an actual contrast control in the video out stage, or an IF gain control like some early sets?

I am a little backed up with customer repairs so had to put the toy aside. Once caught up again I will have a look and report back.