Anyone know what this is for? Some kind of ballast tube, made in 1963. Searching the FSN came up empty Dave N9ZC https://photos.app.goo.gl/Zaci4YtM6QNDaQWf7 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mailman.qth.net/pipermail/milsurplus/attachments/20230409/e36a75d6/attachment.html>