20 Most Recent Galaxy Radios DX-66V Base CB Radio - Page 2 Questions & Answers

your radio is on shortwave 27mhz so you dont need to ajust anything

hello ive checked around the radio market and the best price i came up with is $300

gal 66 check the 10kHz switch. or you may have a bad cap, or crystal,.. the 33hp2 check the am regulator transistor... is bad or shorted.

sounds like the vco section need to be touched up solder.on the top side of the radio. http://www.cbtricks.com/radios/galaxy/dx66v/index.htm

on a galaxy the mic will not hurt the rx.. nor will echo time/speed change anything. on modulation. there is a problem. i do have time for my customers if you want me to look at it... can look at it and give you a quote. the parts are very cheap for cbs. it just the time cost.. i wouldn't spend more than $45 on it myself. when new exports start @ $199 for a similar model.

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

the freq display can be different from the channel selector display. the crystal in the freqcounter maybe going out or just got out of alignment.... check it with a know accurate frequency counter to determine if its on fequency or not. 000 3174269649

The Galaxy DX-66V is worth between $270 and $300 new. If I were to have one on the shelf for sell at my shop, I would price it at $285. That would be already converted and peaked and tuned, ready to talk.

I hope this helps you out. If you have any additional questions, you can shoot me a pm at [email protected]

Dean
Rollin CBs
[email protected]

When some one at a shop says " I don't have the time to look at it." It really means, I haven't the slightest idea even were to begin to try and fix that radio, because I I am not really a tech, and I just sell Peak and Tunes, & snake oil.

I can't really say without looking at the radio and tracing down things, but there is sometimes a problem with a cap in the frequency counter circuit, that causes a buzzing sound.

As for the low modulation, there are too many things that could cause this. It really needs a tech, and your gonna end up paying to have it fixed. I would just call galaxy and talk to a tech, and most likely send it in.

You can look at the caps and look for ones that look damaged, or burnt. Also look for any components leads shorting on other components. If you find something that looks burnt or busted, if you have soldering skills, you can replace it with the same part.

You may solve some of the problems that way. That's the first thing you look at when working on a radio with a problem, the second is looking on the trace side of the board for cold solder joints.

From there its a lot of testing.

yeah your mic gain is way too high. You can either turn off talk back if you can, or turn the gain down. Depending on how loud the talk back is, your audio may suffer. If that is the case, you will not be able to run that mic. Get an RK-56 or a Skythumper mic. They are noise canceling. You will get no squeal with that mic, and it will sound awesome.

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

Sounds like you have a lot of interference. Could be something in the vehicle causing all the noise. Try it with the engine off. Also make sure the antenna system is correct. for example, coax good. antenna grounded. SWR low. etc.

You have hooked your power wire up backwards at some point and blown the polarity protection diodes.

This requires opening the radio and using a soldering iron to remove and replace the blown diode.

You will need:

1. Soldering Iron
2. Solder
3. De-soldering braid
4. N1004 diode or better.
5. Phillips head screw driver.

Using the phillips head screw driver to take the bottom cover of the radio off being careful of the speaker wires. Using the soldering iron, heat the solder on the tabs of the speaker and pull off the wires. No need to use the de-soldering braid to remove the solder. You should do this to make it easier to handle the radio, and to avoid damage to the speaker or wires etc.

Now take the cover off the top of the radio. This will reveal the "Trace" side of the board. This is where all of the components are soldered to the board.

Now flip it to the other side where you can see all of the components and wires etc. Look at the back right of the radio by where the power socket is. Look for D93. its a big black diode. It will most likely be black and burnt. Some times it may not be.

Here is the tricky part. You need to locate the points at which this component marked D33 is soldered to the trace side of the board. Some times you can use a bright light and look at the trace side of the board while the light shines on the other side to locate the part.

Once you have located the points at which the diode is soldered too, do not de-solder it yet. Make note of which side of the diode the white band is on. This is important, putting the diode in with the wrong polarity will make the radio not work.

After you take note of the white band you may now use the de-soldering braid to remove the solder from the trace side of the board. To do this, place the braid over the solder point. put the tip of the soldering iron on the braid and press it down to the solder point. You will see it **** the solder into the braid.

Once the solder is off both solder point, flip the radio and remove the bad diode.

Put the new diode in, making sure the white band is on the same side as the original diode.

Once again flip the radio over to trace side of the board and solder the new diode in. To do this place the tip on the solder point, making sure to touch both the solder point of the board and the wire from the diode. take the solder and touch it to the solder point, not the soldering iron tip. Once enough solder is on the point you can remove the soldering tip. Don't use too much solder.

Once both points have been re-soldered, solder the speaker wires back to the speaker. Red is positive, it connects to the tab marked by the positive symbol "+". The white wire is negative. It goes to the negative symbol, "-". You can just reheat the tab, and put the end of the wire into the melted solder and remove the solder tip while holding the wire in place until it cools enough harden again.

After the speaker is re-soldered, Put the covers back on. Now be very careful hooking up the radio to power. If you hook it up backwards again it will blow the diode again. Once the power wire is connected, turn on the radio, it should work fine at this point.

Good Luck!

Look on the bottom of th board near the audio chip you will see a resistor or a resistor and Capacitor combination just laying on the board tack soldered to it. Heat and lift one end turn the radio back on and see if the talk back is gone. If so install your switch there.

To do it correctly you will need a Scope so that you can see when the Audio equals the RF Transmit power if it is Less it is not efficient. If it is more it is Over Modulating and splattering and not giving you intelligible transmitted signals. The best way is to get an old copy of the Radio Amateurs Handbook from the late 50s to the early 60s they have a circuit you can build to watch Modulation on an FR Carrier that will do exactly what you want.

Since I don't know what it is it would be hard to say. But in any case yes you can use both upper and lower sideband on any channel (Frequency)

I got one from the folks who service them at this phone number (706) 270 3829 they Emailed it to me for FREE!

I have found bad cabling and bad grounds on this and the other board in the freq counter can.

kinsay love ni aiah sa school

it needs an alignment. The VCO is out of whack.

the 66 doesnt have sideband 45 watts is a hell of a lot of power how did you get 45 watts mine does about 20 watts and is loud as hell