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Required,mic wiring details for ft290 transciever

Ft 290 wiring details for mic.

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  • Mike Docking Jul 31, 2008

    MANY THANKS TO ALL THE LITTLE HELPERS.



    MUCH APPRECIATED,

    DAD-OF-TOFFEE.

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290 plug


looking at the end of the plug that goes into the 290 the pins are labelled, with the notch at the top, the connection to the right is pin 1 , counting clockwise connection 2 thru 6 (6 is to the left of the notch.) 7 centre


1mic earthand common return for up/down button via lock switch and ptt, 2mic, 3ptt, 4 +5V, 5 spkr, 6 up button, 7down button
Hope this helps

Posted on Jul 31, 2008

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I have no sound, even when I key mic. The meter goes up one time and not the next.


This could one or more of the following problems. I'll start with the ones I feel are most likely the cause, but you can check them in which ever order you like.

When the mic is keyed, you should not hear anything from the reciever. The mic's PTT (push to talk) button switches the transciever from recieve mode to transmit mode, if it didn't all you would hear and transmit would be screaching feedback. Also, during the transmit mode, the radio's meter should switch from indicating relative signal strength (or "S" units) to power out where 4 watts AM should indicate full scale deflection of the meter.

This makes me believe that you've got a intermittent connection in the mic circuit. This can be anywhere from inside the mic, mic cord, mic connector and inside the radio - from the mic jack. The cord is supect as it is always being twisted, pulled, stretched and strained under extremes of temperatures and humidity.

You can check the cord by simply replacing it or with a dummy load connected to the antenna, see if keying the mic and shaking the cable makes the power meter jump or bounce. Twist and pull the cord over its entire length - but pay particular attention to the strain relief points near the mic body and connector as these are typical points of failure.

Check contacts inside the mic, between the mic cord and plug, mic plug and mic jack on the radio to be sure there is no oxidation or broken / shorted wires.

There may also be a problem with a blow speaker, which would explain the lack of audio on the reciever. Connect an external speaker to the external speaker jack (if provided) or open the radio to connect a speaker to the one under test.

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I hope this helps you identify the source of the problem - good luck!

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Mic wiring details reqyuired for ft290


290 plug


Looking at the end of the plug that goes into the 290 the pins are labeled, with the notch at the top, the connection to the right is pin 1 , counting clockwise connection 2 thru 6 (6 is to the left of the notch.) 7 centre


1mic earth and common return for up/down button via lock switch and ptt, 2mic, 3ptt, 4 +5V, 5 spkr, 6 up button, 7down button
Hope this helps
regards,
Colin

Jul 11, 2008 | Computers & Internet

1 Answer

Ft290


from the manual.mobile mic, pin1, braid. pin2 white(mic).pin3 ptt black.pin6 freq up,blue. pin7 freq down,red.hope this helps

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