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SOURCE: 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.
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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
SOURCE: Add ch's to the Galaxy DX 959
yes very easily have done 3 of these radios myself. It is posted on the net
SOURCE: Galaxy DX 959
1. Remove bottom cover from radio. 2. On the main PCB, locate J33. (See diagram above) 3. Locate wires on pins marked "P5" (yellow) & "P6" (grey). 4. Cut wire on "P5" (yellow) and install a SPST switch in line. 5. Cut wire on "P6" (grey) and install a SPST switch in line. NOTE: By using two of the function switches available on the radio will eliminate the need for two new switches to be installed and mounted.
SOURCE: i just want to know the procedure for tuning or
this is for any radio.
follow the audio wire. to the variable resistor on that line. for your
modulation. for TX go backwards from the rf transistors to see if there
is one for rf power actually would be a voltage increase/decrease to
the bias. and collectors. thats how to trace any radio for the tune up
adjustments. the others would be for ssb or rx tx meter and squelch
etc... just follow them thru the circuit ... all this can be done by a
radio shop for less than $10 remember not to let or yourself cut out any
of the circuit that will cause overmodulation. and its just wasted.
looks good on a wattmeter but not on a oscilloscope .. and other on
adjacent channels.. lol..
SOURCE: got a galaxy dx 949 mobile trying to wire a older
Hello twelch,
Welcome to FixYa.
My name is John, and I will be assisting you with your issue today.
If it is the old four(4) wire mic, the wiring will be as follows:
Pin #1. Shield (Ground)
Pin #2. White (Audio)
Pin #3. Red (Transmit)
Pin #4. Black (Recieve)
If it is a SIX (6) wire! The Blue would go to Pin #1. with the Shield, and the Yellow
has no connection. I hope this was helpful to you. Your Comments and Testimony's are
always welcome here at FixYa. Thanks for choosing FixYa today and in the future.
John
Testimonial: "thanks john for the help"
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