Motorola Mocat 2020 40 ch. mod help Please!

[drdog]

Can someone please tell me what the 40 channel mod is for the Mocat 2020? Mine is stuck at 23 channels and I remember that I used to do this mod, like a hundred years ago, and forgot what it is.

 

[prcguy]

The mod is to replace the channel selector switch with the 40ch version. I remember upgrading a bunch of these when 40ch were released but good luck finding the switch these days.
prcguy

 

[drouse3]

I have a cb radio list that shows the pll for all radio's made. No Motorola model that started with a number 2 had a pll chip in it, they all started with the number 4. If this is correct, It would cost a lot of money to get the extra channels in this radio.

 

[rfradioconsult]

Yup replace the channel switch with a 40 CH switch, common swap when they first came out.

 

[SOFA_KING]

I have a cb radio list that shows the pll for all radio's made. No Motorola model that started with a number 2 had a pll chip in it, they all started with the number 4. If this is correct, It would cost a lot of money to get the extra channels in this radio.

Not true...it is PLL.

The channel selector is the best method, but you will have trouble finding one. I came up with a mod that works with a simple switch. It does add more channels...maybe too many more! (23 up to 64). There is a binary truth table that steps the freq up. The switch shifted the freqs by adding voltage to (or grounding out...it has been so long since I did it) pins on the program divider chip. You need a cross reference chart to know where you shift to.

The best feature of this 2020 radio was the Extender Noise Blanker. This is the same (very effective) blanker put in the commercial 2-way radios. It really blanks pulse noise. And the 23 channel radios have many more parts inside, and are much more sensivive as a result.

 

[drouse3]

Not true...it is PLL..

Chip number please.