a real challange?

[Yamamaya42]

Originally Posted by Notimetolooz

The contacts for channel 7 may be damaged and no amount of cleaning will fix it. I don't see why you couldn't use another channel for alignment but I don't know this set.
From the video it looks like you might have a noise or interference problem in the video signal.

I took it off a crappy cellphone cam, it does not work very well for this, the noise is the cam trying to auto adjust

[Kevin Kuehn]

Per Sams have you tried injecting your test signal direct to the mixer grid? With the oscillator tube removed and signal connected to the mixer grid there should be no reliance on channel selection, because the mixer is post any channel tuning. You could also inject the signal to the shield of the mixer, keeping the shield insulated from contacting the chassis.

[Kevin Kuehn]

If your rf generator is not perfectly calibrated to your sets IF you should be able to rock the generator tuning and find out where the signal gets through to the detector. You know the IF is working at some frequency or you wouldn't have been able to watch channels 3-4.