[R-390] Collins R 389 PTO

[2002tii]

Gord wrote:

>If you are going to solid state the PTO, why not solid state the 
>frequency readout too.  A thin LED or LCD display running off the 
>microprocessor could fit into the current bezel which would make the 
>mod reversible.  That would enable a simple shaft encoder to give 
>the required accuracy, and turning it fast would give a fast mode 
>(lots of kHz/click) change and slow (a few Hz/click) would give 
>better resolution.  Then, non-linearities are irrelevant.  Do I get 
>burned at the stake for this suggestion?

No, but linearity and absolute rate are both still important because 
the VFO needs to be synchronized to the tracking filters (unless you 
are willing to tune the RF and VFO independently -- ugh).

Best regards,

Don