Euro CB Pacific IV mod for clarifer HELP

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Retro_CB_Dude
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Euro CB Pacific IV mod for clarifer HELP

Postby Retro_CB_Dude » 10 Jul 2017, 19:02

Good folks here and CB enthusiast alike I need some help and input on my newly obtained Euro CB Pacific 4 regarding the clarifer unlocking please!

I've tried locating the 4pin connectors but at this point it seems they must be added yourself. I really like this radio and it already has the channel mod done to it which seems to correspond to the diagram below but this clarifer mod has me puzzled for sure...

Seems this was released perhaps only in France from the looks of it and my reseaching. I would at least like the coarse clarifer unlocked for practical reasons and I am seeking some helpful insights on this !

Thanks in advance and look forward to some kind help, Retro Dude (James)
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normal
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Re: Euro CB Pacific IV mod for clarifer HELP

Postby normal » 11 Jul 2017, 01:54

more pictures

It appears to be the same board as the Zodiac Consul. The Consul has a single clarifier knob with a clarifier-off setting when fully anticlockwise.

The Consul schematic clarifier section thus appears to not be exactly the same as the pacific IV, it may give you some hints though.

If I'm reading it correctly, the Consul schematic shows the clarifier control VR7 produces a variable voltage that goes to varicap diodes connected to both the 36MHZ and 10.24MHz crystal oscillators, not sure why both.

My guess is that you need to trace where the positive ends and the clarifier potentiometers go and draw out that bit of the circuit. I suspect that there are some diodes connected to tx/rx switching voltages so that current goes through either two fixed resistors or the course clarifier.

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14CS06
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Re: Euro CB Pacific IV mod for clarifer HELP

Postby 14CS06 » 13 Jul 2017, 19:49

Hello Jim

Some pics Euro CB Pacific IV

Image

Image

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cb4ever104
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Re: Euro CB Pacific IV mod for clarifer HELP

Postby cb4ever104 » 14 Jul 2017, 11:41

My Spanish is better than my French , but the diagram seems to says to reconnect the 4 pin connector found at the front left of the radio . Looks as if you might have to turn the the original connector upside down and reconnect it ?

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14CS06
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Re: Euro CB Pacific IV mod for clarifer HELP

Postby 14CS06 » 14 Jul 2017, 11:57

Hello

There seem to be two models of PCB

Jim should display the images of his PCB

Other PCB

Image

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Retro_CB_Dude
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Re: Euro CB Pacific IV mod for clarifer HELP

Postby Retro_CB_Dude » 19 Jul 2017, 22:28

Gentleman I need the schematics for my Euro CB Pacific IV if there is any real hope in unlocking at least the coarse clarifer unless someone has specific notes on a confirmed method to do it please contact me ASAP... But mine has the PCB SSB145106 !


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