Galaxy dx2547 power supply

I bought a DX2547 to verify that my channel kit will work in it. I checked the voltage to the power supply in the radio. As per other radios I have had that contained a switching power supply, the max voltage available is 13.6. I changed out the resistor that is nearest the VR control. It tested at 3. 2K. I replaced it with a 3.0 k. And that raised it to 14.45. The power output of the radio is greater and so is the modulation.

 

Don't know. But I do know that 14.45 is still within a safe range.

 

The radio has a jack on the back of it so that you can run it on a power supply or run it in a mobile. I hooked it up to the power supply at 14.5 and it worked fantastic. I have never run any mobile on base at 13.8.

 

I would imagine 15 volts and Beyond is too much. I never go past 14.5.

 

It is nothing but a mobile with a power supply. When they switched to switching power supplies, they did not engineer their own power supply. They took what was available. And what was available at a cheap price was one that only puts out 13.6. All I did was raise the voltage up less than 1 volt. No harm coming from that. They also put a low rated voltage regulator on the radio. I always upgrade that. They also put low-grade capacitors on some of the main components. I also upgrade those. When you upgrade those, you take some of the load off of the regulator.

 

Perhaps a 3.1k would be good middle ground, but 3.0 is what I had.

 

Yes, that would have made a world of difference when they were trying to get back to Earth on minimal power. They also learned a lesson about the oxygen scrubbers. They should all be the same size and shape. But they still to this day carry duct tape to the Moon.
Most of the newer radios, if not all of them, use LEDs now. But I totally agree. I do the same thing.
The switching power supplies on the DX to 547 have a sticker on them that says output, 12 volts. They just turned the variable resistor to its Max, which is 13.6 volts.

 

and just for the record, It does not have to stay at 14.45. You can turn the output down to the level you desire on the variable resistor that is on the power supply after the modification.

 

I set it at 14.2

 

14.45 was what it was doing after the mod and the VR was still set all the way up where the factory set it but only putting out 13.6. So this is a good mod for these.

 

But you have to be careful. I believe there is more than one power supply they are using in the DX 2547.
For record-keeping purposes the power supply is marked RS - 100 - 12 with a sticker on the power supply