[R-390] PTO extender cable

[DJED1 at aol.com]

Just out of curiosity, Roger, what was considered acceptable linearity for 
working radios, considering that the factory spec was 300 cycles?   I've tweaked 
my Cosmos to be within 300 cycles at each 25 Kc point, but I expect worst 
case errors are probably 500 or 600 cycles.   And I can't imagine doing 
adjustments on a corrector stack.   At least the Cosmos is a screwdriver adjustment.
Ed