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Questions about tubes and gear that glows. FAQ

Reflow the PCB

Reflow every solder joint on the PCB, this will fix the intermittent connection 99 % of the time. Take special care to resolder around the eyelets - Most Dynakits were soldered by amateurs and cold solder joints are very common. The socket connections to the PCB also sometimes work loose from thermal cycling.

I used to look for the problem visually, but resoldering is far quicker.

If that doesn't do it, carefully tap with a pencil eraser. Hairline cracks in resistors or capacitors make up most of the rest of the problems you'll find.

Change out the coupling caps, rebuild the bias supply - both for safety.

Schematic for this (and all Dynaco vintage tube gear) is on my website below if you need it.



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  • Reflow the PCB - Gary Kaufman 12/16/0411:45:52 12/16/04 (0)


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