12vdc to 24vdc

[atvguy585]

As I understand, some radio equipment used to be or can still be 24vdc requiring an inverter or dc to dc converter in a 12vdc system. I thought I would see if anyone here has had that problem? If so, did you find a solution. I don't need more then 400mA of power but I need to take 12vdc and turn it into 24vdc. I would like to find an inexpensive converter or a schematic to build one. A kit with all the stuff would be the best way to go because I wouldn't have to make a pcb board.

 

[iMONITOR]

Is this requirement for your car, portable, or home base?

 

[atvguy585]

I need it for the mobile. I need to have 24vdc coming from my 12vdc vehicle.

 

[iMONITOR]

I checked Ebay, and they have a few 24vdc-to-12vdc, but no 12vdc-to-24vdc. A quick Google search turned up a lot of options. One in particular that caught my eye is this:

FP-DCC1 12 Vdc to 24 Vdc Converter

 

[atvguy585]

Yah, I have those at work. The bad thing is that they are a little over $100 my cost. I'm trying to see if someone knew of a cheaper alternative. I'm looking to spend under $40 on one.

 

[iMONITOR]

I was going to suggest a second 12v Gel-Cel in series with the vehicle battery. But then I got to thinking about common grounds, charging issues, etc. I'm sure there would be a safe way to make it all work, but I'm too tired to figure it out right now.

 

[atvguy585]

I was going to suggest a second 12v Gel-Cel in series with the vehicle battery. But then I got to thinking about common grounds, charging issues, etc. I'm sure there would be a safe way to make it all work, but I'm too tired to figure it out right now.

I was thinking the same until I realized all of the above issues as well. If you can give me some ideas on how to make something like that work when your awake, I would appreciate it.

 

[iMONITOR]

Is the 24v device connected to the vehicle's ground in any manner? ie; Power lead, metal enclosure, antenna ground, etc?

 

[atvguy585]

This is what I'm hooking up.....

ST-PA6 Audio Power Amplifier - 6 Watts

 

[N_Jay]

Probably better just to get a different amp.

 

[atvguy585]

Probably better just to get a different amp.

Well considering I got it for free, I was hoping to find some way to use it. Most of the small amps I've seen are no less then $70.

I did find this which I might give a try....


12V To 24V DC-DC Converter Circuit

 

[N_Jay]

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[atvguy585]

Parts-Express.com:*Velleman 30W Stereo Audio Amplifier Kit | velleman stereo amplifier stereo kits kit ic audio amplifier audio audi amps amplifiers amplifier kit amplifier amp kits amp kit amp

Parts-Express.com:*Velleman 7W Mono Audio Amplifier Kit | velleman power amps power amplifier power amp power kits kit ic audio amplifier audio audi amps amplifiers amplifier kit amplifier amp kits amp kit amp 4 ohm 2 ohm kits-41108

Parts-Express.com:*Velleman VM114 7W Mono Audio Amp Assembled | VM114 velleman power amp power amplifier assembled power mini kits kit circuit board board audio amplifier audio audi amps amplifiers amplifier kit amplifier amp kits amp kit amp 4 ohm 2

Thanks alot! I forgot all about vellman. I'll try that out.

 

[KF7DUR]

If you already have a 12vdc to 110vac inverter. You can buy a 24vdc 500ma "wall wart" for under $20.
Not the most elegant solution, but it's cheap..