858pll Pres Madison Adding Freq Counter

[575]

I just got a first gen Madison recently and making it mine. I've already swapped out some bulbs for LEDs. Just replaced gears in the clock to get it going again.

Next up freq counter. I just bought this.
https://www.ebay.com/itm/112260278850

Now I'm looking for info on how and where to connect each wire. I know about the 7.8 offset which the one I ordered can do.

My findings so far:
Connect counter to GATE 1 of FET 4 with a 39pF in line Will this work? Higher pF, 47pF? Or is it R106?
https://www.circuitspecialists.com/21cb039.html
Of course offset counter
Wear a grounding bracelet?

Info I need:
Is my research correct so far?
Where to connect the other 3 wires? The counter has 4 wires. 2 for power and 2 for reading freq. Where do I connect the other wire to read freq (I assume this is ground?). Where do I connect the power wires for 12v power and ground?
Any resistors on the power side?

Video of my setup so far



I snagged this out of another thread... I'm thinking this might be a cobra 858 chassis

 

[575]

I just got shipping notification from China. Now for the long wait.....more time to research how to connect this.

 

[Shadetree Mechanic]

Did you get the counter yet?

 

[575]

i did get it. i started on the install and didnt check my work. went to power on the radio and fried a capacitor. my madison is at my local shop getting the capacitor replaced, freq counter installed, and a digimax channel kit installed.