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Old April 6th 17, 04:47 PM posted to rec.radio.amateur.moderated,rec.radio.amateur.boatanchors
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Default QRZ Forums - "Boat Anchor" & Classic Equipment for Thursday 6 April 2017

"Boat Anchor" & Classic Equipment

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2A12 ballast tube...

Posted: 05 Apr 2017 02:45 PM PDT
http://forums.qrz.com/index.php?thre...t-tube.561893/

Hello gents, may I ask a question?



Im working on a new project, and it contains a 2A12 ballast tube. I powered
up this unit briefly after replacing electrolytics, and while the other
tubes glowed happily, I saw nothing from the ballast. This is the first one
Ive seen, so I dont know if it should glow.



My Simpson 445 tube tester wont test this. I see 88 ohms resistance between
pins 2 and 7. Nothing between any of the other pins.



So, should a ballast tube emit a visible glow?...



2A12 ballast tube...


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