[R-390] PTO endpoints

[Pete Williams]

G'day .....

I've done over 20 PTO for R-390's- both types...never done end points or
linearity in the receiver and always use an external PS with the two HT for
the R-390A or the 180V only for the R-390/URR-- so  much easier,
Yes have taken  a turn off on occasions... have also reduced the 10p to -say
5 pf...... no long term obvious effect on stability.
Linearity in the COSMOS type a  real PITA,, some of the  screws are Bristol
wrench type heads and the perfect tool is the smallest wrench in the Bristol
spline  key kit # SS-508.
I break it at the right angle bend and fit the shank into a small pin vice.
For the ones with slotted heads I use a long thin  Allen key ground to fit.
It's worth the trouble to make up /get an external PS tho.
Pete VK3IZ