[AMRadio] A standard or catch as catch can?

[K9FH]

On 2/25/2022 12:31, CL in NC via AMRadio wrote:
> When it comes to converting old CB gear to 10 meters, are their 23 frequencies on 10 meters that are where most folks end up?  I picked up an old Courier 23 that just needs one crystal changed in the mixer to put all 23 freqs on 10, and wondered if I would be alone.
> 
> Charlie, W4MEC in NC
> ______________________________________________________________

The early tube and fixed channel xtal cb's that had a 1650 kc i.f. were
super easy to convert.  Just swap the rx xtals with the xmit xtals,
retune the rx front end and xmtr output and you were good to go.  The
frequencies you ended up on were the original cb channels plus 1650 kcs.

Phase locked loop synthesizers using a single pll chip (pl-02?, pl-03?)
were able to shift their operating range into the 10 meter band by
changing the frequency divider ratio by jumpering a few pins on the pll
chip. I don't remember the range of frequencies where you wound up. In
theory, you could replace one reference xtal if you could get one made
by International Crystal to achieve similar results.  Later years had
models using a different pll chip that wouldn't allow changing the
divider ratio.

Phil - K9FH


-- 
My OpenPGP key ID: 0x9A135171