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Old 05-24-2014, 06:19 PM
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rca2000 rca2000 is offline
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Join Date: Mar 2003
Location: cincinnati,ohio
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I only now notieced the channel bulbs were out. I figured they were #44 or 47, not #159. No matter....I have some 159 or 259's in my nightstand drawer for stereo dials IIRC.



Here is a question--likely for the "oldsters" here.

I KNOW and understand how a bad retrace cap(sometimes called tuning cap or safety cap) can and WILL cause a serious increase in HV on a SS set. I think I first read of the situation from radio-electronics, in an article from the late '70's or so by Jack Darr. He explained the whole deal with the tuned ckt, and how if a cap in the collector of the H-out opens--it upsets the tuning--and the HV will the increase--sometimes a LOT !! He spoke of some engineers from Admiral or maybe Zenith, who purposely tested this theory--and said the HV would spike to OVER 40kV, and said that was as high as the meter went !! Of course--this was as a warning to make SURE the tuning caps in certain sets--such as Zenith flattys and the 4-lead caps in the vertical sets too--were good. I learned all of this in the late 1980's or so.....and MUCH , MUCH more from his articles....


HOWEVER....I am curious. Did this happen in TUBE sets? I know that if the shunt reg opened up, the HV could go over 30KV. or so. BUT ..was their any sort of tuning caps off of the plate ckt of the H-out tube, as in the SS sets--that could cause this??
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