Motorola ts907 low hv

[timmy]

Originally Posted by Electronic M

Probably. It could also be that the cable box has such a lousy modulator that some sets don't work well with it. I typically only use Blonder Tongue modulators to feed my sets because I've had cheaper consumer modulators so lousy that they would only work properly with some SS era sets...I know the BTs are professional enough that I don't have to worry about "don't sue me" level design becoming a problem with them so I try to stick to using the BTs.

Literally some of the cheap built in modulators in consumer cable boxes, VCRs, etc are so cheap they don't suppress the unused sideband of the video carrier causing interference with adjacent channels and issues with older sets tuning the wrong sideband, issues with audio RF level being wrong, incorrect output frequency, cascaded single osc modulators allowing over modulated video to create unfixable video buzz in the audio etc.

It could be either the modulator in the cable box or the alignment or both...It's up to you to figure out which. The run the cable box through the good DVD modulator idea I mentioned in my last post can help you determine which it is.

The DVD player is plugged into an old rf modulator and ant out to the tv then I’ll disconnect and put the cable wire directly to the antenna terminal with the matching trans I don’t think cable signal could be that bad could it. I have a distribution amplifier that is 36db gain adjustable I could try that maybe the cable box signal is very weak. Well I just tried the rf amp no difference so back to the diddle stick.