MONO power supply

[Moondog55]

OK I'm a newbie and know very little about building amps but I saw this on Ebay and if the price is right why not??

Would this work as a sub amp transformer??

http://cgi.ebay.com.au/Transformer-2...ayphotohosting

Regards
Ted

[jamesrnz]

how much current and voltage do you want to make?

do you need polar out puts?

do you want to make a switching power supply or a standard linear type supply?

you might ask the seller if the output is 52v across sec or 52-ct-52 making 104?or 26-ct-26...


if it is 52 across the sec i might consider a straight full wave lc power supply at about 73 volts 52*1.414 or 26*1.414 =36

OR a full wave rect with a buck switch.

this is obviously a 50 or 60 hz transformer so it can only be used as the input isolation transformer not the switching transformer.

so more info will help the forum answer you.

[Moondog55]

Honestly don't know, I've sent query to seller waiting for reply.

It's just that I have some BIG smoothing caps here and it seems a shame not to use them somehow.
So I guess thats a standard linear PS.
I was looking for about 4/500 watts for a possible new party subwoofer box I may build.
The caps I have here are "Marchon" and I have 6 of them, each 33kuF/63V, so I guess these won't work with 73Volts unless I use them in series.

I was given a "rule of thumb" to use 100uF per watt of output, I was thinking that would be OK for 350 watts if the trannie had sufficient reserve

[AndrewT]

Hi,
I think this is a single secondary transformer 240:52Vac.
This can only produce a single polarity DC supply.

If you connect two half wave rectifiers to the output you can get low quality dual polarity supplies but I doubt anyone here would recommend that solution.

Go buy a dual secondary or centre tapped secondary transformer.

The highest secondary voltage you can connect 63Vcaps to is around 41Vac. 48Vac or 50Vac require 75V or 80V caps.

[jamesrnz]

it looks as if there are 2 yellow wires and a black on one side and 3 screw terminals on the other side. so it could be ct on both side or ct on one side with a Faraday shield, he'll have to see what the seller says, IF the seller knows.

nice piece of iron though, i might like it if it wasn't down under..........