[GreenKeys] ST-6 routine maintenance

[Duncan Brown]

I was checking out something with my ST-6 and found (monitoring the 
Scope output) that there was no 850 hz shift Space tone (2975Hz). Other 
shifts were OK.

I opened up the unit and before starting detailed signal tracing, I 
thought I should do a visual inspection of the 2-850 detector board. 
BINGO! As I pulled the board out, I could feel that the two toroids were 
very loose! The hardware  holding the toroids to the board was very 
loose, allowing the toroids to move around and break one of the fine 
toroid wires.

After tightening the hardware and repairing the broken wire, I checked 
all the other toroids. None were as loose as the broken one, but they 
all took a couple of turns of the screwdriver to snug them up.

So just a work of warning - check your toroid hardware occasionally!

Have fun,

Duncan
K2OEQ