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My galaxy dx 66v when i turn it on it stays keyed all the time even without mic pluged in..........and when i turn my talkback switch on all it does is squeal.need help

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Make sure the mic connector board is not touching anything inside. if it is not.. below it is a diode for the TX/RX.. replace it with 2 914 diodes and should work again.. 99% of the time..

Posted on Mar 29, 2011

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If you really want a roger beep, take it to a tech and them install one.

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5 Answers

Galaxy dx-66 squeals on talkback


timspur, hi. First off, using the talkback with a tuned Galaxy will give you problems, so you need to use a good noise cancelling mic like a RK 56, or Astatic 636. If your running an amp, that will only amplify the problem. Here is a mod if your comfortable working on your radio, to tone down the TB volume.
******
Talkback can become distorted if these radios have been "peaked," and there is no cure because the talkback just amplifies what goes to the RF section. Try adding a 470k ohm resistor from junction of C155/R207 to the junction of C187/R235 on the solder side of the board. This will also give you clean talkback on SSB and FM. Try different values of resistance to get the amount of volume you want. The less the resistance the louder the talkback will be.**
Hope this was what your looking for,, I know for a fact that the Astatic mics do help tone it down.
Let us know,,, Mechanic

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as far as the transmit frequency changing while you have the mic keyed this is normal, the transmit frequency is a little different than the receive, as far as the lost channels go you need to check the galaxy website and check to see if thier is any fixes listed. if none is listed then you can send the tech's a e-mail and tell them your problem and they will advise you on what to do.

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