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Old 05-27-2013, 08:32 PM
kramden66 kramden66 is offline
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Join Date: Nov 2010
Location: Rockaway, NJ
Posts: 1,420
Dumont RA-109A help needed - very little high voltage

Its been recapped and finaly ready to go , well the sound works but no raster or sound of horz sweep , i tried the probe and theres maybe 1kv on the anode , tried the 1x2 that is v31 it has a connection from pin 1 according to sams it goes to a doorknob and to ground , it has more voltage when doorknob disconnected (2kv ) i tried replacing the doorknobs it made no change , sams shows a doorknob from pin 9 of v32 (1x2) to pin 1 of v31 (1x2) and there is none in the set nor signs there ever was one , also observed v31 gets hot fast , replaced the 1x2 tubes and no change , if you measure pin 1 of v31 when set turned on it shoots up and almost gets to 5kv before it quickly drops to 1kv , fly seems ok , any ideas where to go from here ? horz out or osc area ?

i did notice i didn't hear vertical roll or anything like that , will double check
thanks
mike
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