We have working deflection Amplifiers
Posted: Sun Apr 29, 2018 8:45 pm
Good news on the deflection amplifiers .
Using again the circuit from the radio communication hand book vol 2 as in the past 2 go's on the deep image SSTV project and The Thylacine monitor ,3rd time here .
Testing them on both of the vidicon's Yoke coils show they sure work test points here are taken on the deflection coils picture 1 the vertical and 2 the horizontal ,my 1 mhz scope waveforms not good for higher frequency stuff so i suspect my results would look better on my 20 mhz scope ,any case it looks good so far .
Heater test from yesterday you can just see the heater with current limiting resistors connected ...
Next Step because i already have a pre amp i am right there ,that was tested again a few days ago ,i'll end up just inserting the sync in a similar way i have done in the PMT camera build that little circuit i have yet to build but i know what worked last time so just copy again .
I'll power up the tube in a few days in lower light levels for a start and see how it go's .
BTW great old vidicon build here below you tube link ,like the yoke coil test explained at the end dc applied to the yoke with a needle on string !
https://www.youtube.com/watch?v=UEoxVHxAapA&t=232s
This one below i am horrified !
https://www.youtube.com/watch?v=mNbuABjqXe4&t=1028s
Using again the circuit from the radio communication hand book vol 2 as in the past 2 go's on the deep image SSTV project and The Thylacine monitor ,3rd time here .
Testing them on both of the vidicon's Yoke coils show they sure work test points here are taken on the deflection coils picture 1 the vertical and 2 the horizontal ,my 1 mhz scope waveforms not good for higher frequency stuff so i suspect my results would look better on my 20 mhz scope ,any case it looks good so far .
Heater test from yesterday you can just see the heater with current limiting resistors connected ...
Next Step because i already have a pre amp i am right there ,that was tested again a few days ago ,i'll end up just inserting the sync in a similar way i have done in the PMT camera build that little circuit i have yet to build but i know what worked last time so just copy again .
I'll power up the tube in a few days in lower light levels for a start and see how it go's .
BTW great old vidicon build here below you tube link ,like the yoke coil test explained at the end dc applied to the yoke with a needle on string !
https://www.youtube.com/watch?v=UEoxVHxAapA&t=232s
This one below i am horrified !
https://www.youtube.com/watch?v=mNbuABjqXe4&t=1028s