Attention Old Coot Gotham Needs Your Help

[vts1134]

Originally Posted by jr_tech

That whisker must have been drawing quite a bit of current to load down the B+ that much, I'm surprised that there there was no smoke or fireworks to reveal the location of the short.

jr

It was actually a "splatter" of solder that was the culprit. I didn't leave the set powered on for more than 10 seconds or so while I was experiencing the problem so it wouldn't have had enough time to heat up to smoke stage.

[old_coot88]

What had me bamboozled was the absence of overheating or any indication of excessive current being drawn from the B+ supply. In fact only half the normal voltage was appearing across the resistor chain (R94/R95/R96), indicating only half the normal current was being drawn (total supply current flows thru that chain).
Anyhow, glad U got it sorted out.