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dalekmoore2007 · 2nd Nov 2019, 2:42 am

The geared motor needs some sort of syncing ..my plan today was build a sstv demodulator to get the 15 hz line sync which is varying frequency due to motor speed ...feed this into a 4046 PLL with also a clock at 15 hz for some motor control with feed back .
Problem also with a record is speed changes playing from the edge to the center...there's a lot of mechanical things going on apart from the electronic side..
I will look into the delay line idea something i have not thought of .

2nd Nov 2019, 2:42 am	#7
dalekmoore2007 Pentode Join Date: Aug 2008 Location: Melbourne, Australia Posts: 213	Re: SSTV Mechanical video recorder Attempt The geared motor needs some sort of syncing ..my plan today was build a sstv demodulator to get the 15 hz line sync which is varying frequency due to motor speed ...feed this into a 4046 PLL with also a clock at 15 hz for some motor control with feed back . Problem also with a record is speed changes playing from the edge to the center...there's a lot of mechanical things going on apart from the electronic side.. I will look into the delay line idea something i have not thought of .