Sidebar Sidebar
  • You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.

Pres Madison 858pll Freq Counter

575

575

Member
Apr 22, 2019
19
11
13
46
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


858ssb-counter-hookup-png.15285
 
Last edited:
  • Like
Reactions: Shadetree Mechanic

Gorgeous radio! Be really nice to see it all when you're done with the frequency counter install.
 
  • Like
Reactions: 575
It is easy to install a freq counter on an 858 chassis, but the problem is getting it to track the clarifier in receive. Tough to do w/o a freq counter that has the proper splits between AM and SSB. I do not know of any aftermarket counter that will do this. Maybe some other members do. Good Luck.

- 399
 
  • Like
Reactions: tecnicoloco and 575

dxChat
Help Users
  • No one is chatting at the moment.


      Top Bottom
      Back