Digital Trim Pot Needed

[88.9 Miracle]

I am in need of a digital trimpot circuit to replace the analog trim pot on a Nicom TX so that I can control the power up and down remotely via relay contacts. Does any engineer out there have the time to help me. I am willing to pay for the circuit. I need 3 of them. Once completed, I can take the existing analog trim pot out of the TX and solder your circuit in, in it's place.

The TX are the NT250 and the NT30

Thanks

 

[ncradioeng]

Maybe you can make one of these work if you need continuously variable power:

http://www.p3america.com/motorized_potentiometers_panel.htm

 

[joep]

This chip is about as simple as it gets:

http://www.analog.com/UploadedFiles/Data_Sheets/AD5228.pdf

However, it's only available in a TSOT package. Not exactly the easiest thing to breadboard. There is an evaluation board available (P/N AD5228EVAL) for $35.00 that might do exactly what you need, however.

 

[tkarvelis]

email your fax number to [email protected]. I used a motorized multiturn pot and 2 24 vlot KHP relay. This works very well for an Energy-Onix 22kw FM rig. I hate having to rebuild a transmitter when the previous owner could not spend the extra $$$ and by a real transmitter.