how to run this amplfier with battery?

[necrophilic_coder]

hi all

**broken link removed**

**broken link removed**

i have a 100 watt amplifier. how to i run this amplifier with battery?

 

[Nigel Goodwin]

Well you don't give much information, and the internal partial picture looks truely horrible!.

Assuming it has a mains transformer?, the easiest way would be to use a mains inverter.

 

[audioguru]

You should attach photos here. Then we don't have to wait for ImageShack to wake up.

You must make or buy an inverter that will work from whatever battery you want to use. The amplifier probably has a transformer that is powered from the AC mains, or you could investigate its DC voltages that an inverter could make.

 

[necrophilic_coder]

there arent transformer, i found this amplifier from street

 

[Nigel Goodwin]

Well 100W into 4 ohms requires about a 65V supply - you could try 5 car batteries in series?

But to be honest it looks a really poorly made piece of junk!.

 

[Hero999]

The build quality is appalling, take it to bits and use it for spares.

 

[crusty]

If you found it for free, keeping hooking up higher voltage till you get something out of it. If you need a large amp 12V source get you an old dead battery, make sure its filled up with fluid(water/red wine) and hook it up a cheap battery charger. the old battery ought to help store some capacitance and help get rid of the ripples from the battery charger, assuming it's a cheapy. or if you need a slightly less amperage 12v use an old computer power supply, yellow and black 12V.

 

[Hero999]

The chances are it needs a bipolar supply so just hooking it up to a 12V battery won't work. You need two 12V batteries, then four and so on and so forth.

 

[necrophilic_coder]

if i remove bridge diodes, can i run amplifier with battery?

 

[audioguru]

The amplifier might not even work.
It might need a dual polarity supply because it looks like two main filter capacitors.
If it provides 100W into 8 ohms then the supply is plus and minus 45V. Use 8 12V motorcycle batteries.

 

[blueroomelectronics]

Nice junk, the word "professional" on the front is a little misleading, where are the heatsinks and power transistors?

 

[CynicalMan]

The build quality is appalling, take it to bits and use it for spares.

Collectors like to call that "vintage"

 

[necrophilic_coder]

Nice junk, the word "professional" on the front is a little misleading, where are the heatsinks and power transistors?

transistors on the heatsink but not showned in the picture. power transistors are 2n3055.