DuMont model# RA-166 - Videokarma.org TV - Video - Vintage Television & Radio Forums

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DuMont model# RA-166

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#11

04-19-2021, 09:59 AM

dtvmcdonald dtvmcdonald is offline

VideoKarma Member

Join Date: Nov 2012

Posts: 1,268

You don't even need video to test the whole video chain from the video detector on.
An audio generator will do. You just hook it up through a .047 uF cap
and play with the frequency for 60 Hz up. If the video works you will
see a sine wave modulation in bars that change with frequency in the obvious way.

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