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Re: Ctcss Board

 

One wire, ground, should be easy to figure out. Your +V should also be easy to trace. The output should be coming from the pot through a electrolytic capacitor... I don't think there's a line you need to ground to turn the encoder on but there may be. Just tie it to ground..
.. hooking it up to a modern synthesized radio, I would use switched voltage to feed to the +V... That way the only time the tone is being outputed is when the transmitter's keyed. It could cause issues if the tone is modulating the phase lock loop during receive.. Ask me how I know ??

Good luck with it

Chris WB5ITT?



On Sun, Mar 16, 2025, 1:10 PM Carl Beaudry via <va2cmb=[email protected]> wrote:

Thank you Chris,

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At least now I know the frequency table of the CTCSS IC.

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I will know have to do some reverse engineering to figure-out what wire does what.

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Unless a member would know what brand and model it is?

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But like a member suggested it is maybe home –made.

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Still nicely made.

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Thank you all for ?looking.

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And best 73

Carl

VA2CMB

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De?: [email protected] [mailto:[email protected]] De la part de Chris Boone WB5ITT via
贰苍惫辞测é?: 15 mars 2025 20:17
??: [email protected]
Objet?: Re: [repeater-builder] Ctcss Board

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On Sat, Mar 15, 2025, 7:10 PM Carl Beaudry via <va2cmb=[email protected]> wrote:

Hi to all,

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I just bought this ctcss board on a local hamfest but cant seam to find the documentation of it.

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I am hopping a member would reconnize the make and model.

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Thank you for looking.

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Best 73

Carl

Va2cmb

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