Heathkit SB-650 Digital Display SB650 Nixie Tubes FixIt

In: Nixie

2 Mar 2011

Heathkit SB-650 Digital Display SB650 Nixie Tubes FixIt

Heathkit SB-650 Digital Display SB650 Nixie Tubes FixIt

Here is a Heathkit SB-650 Digital Frequency Display with Manual. This unit doesn’t appear to be working correctly. The Nixie tubes light up as shown, but they don’t produce a coherent display. I would assume the “at rest” condition with no input would be all zeros. At any rate, I have attempted no repairs. Manual is included.

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