[R-390] Progressitron PTO

[Stan Gammons]

Hi Everyone,

I finally made some time to start on a better alignment of my R-390A and 
was checking the PTO linearity. At 000 it's within about 50 hertz of 
3.455 Mhz.  At +000 it's 2.464634 Mhz per my Leader LDC-823S counter.  
Seems like I have to add a Kc every 100 Kc I go up.  i.e in order for 
the output to be 3.355 Mhz, the dial is 101 Kc. In order for the output 
to be 3.255 Mhz the dial is 202 Kc and so for all the way to +000.  
Although it's not off exactly 10 Kc at +000.  Suggestions on how I might 
get the PTO a might bit more linear?


73

Stan
KM4HQE