winding a power suppy
#11
Originally Posted by abnormal72
What i meant by the resistance is that if you measure the dc resistance of the primary for example, and identify the gauge of wire, this will give you an idea of the total length of wire used on the primary by comparing the resistance per foot.
#13
If I were you I would replicate the origional with heavier guage wire... if you want to mess with things additional turns on the secondary or fewer on the primary will up rail voltage with a loss in current capacity...
be sure no matter what you do you are in the SOA (safe operating area) of the outputs
be sure no matter what you do you are in the SOA (safe operating area) of the outputs
#14
First I would suggest caution when doing this. My first take is that if you do not know the basics of switching power supply, or at least read up on it, then do not attempt this.
Having said that, power supplies are engineered to even out losses. Going to a thicker wire, with same number of turns will reduce the resistive loss in the wire, but it may be more difficult to get tight, even windings and therefore you may end up increasing other losses. There is a heck of a lot of current running thru the windings and you need to know what you are doing.
As for those suggesting measureing resistance to estimate length of wire, I suggest most of you do not have an ohm meter that can measure that low accurately enough. Only expensive lab equipment can measure in the milliohms. Do not attempt to increase the secondary turns as this will increase the output voltage and this will stress the rest of the chain. Higher voltage means higher PA output, higher current draw etc. This means you will need better swichthing FETS, better PA FETS, More heatsinks etc. Just buy a better amp.
Having said that, power supplies are engineered to even out losses. Going to a thicker wire, with same number of turns will reduce the resistive loss in the wire, but it may be more difficult to get tight, even windings and therefore you may end up increasing other losses. There is a heck of a lot of current running thru the windings and you need to know what you are doing.
As for those suggesting measureing resistance to estimate length of wire, I suggest most of you do not have an ohm meter that can measure that low accurately enough. Only expensive lab equipment can measure in the milliohms. Do not attempt to increase the secondary turns as this will increase the output voltage and this will stress the rest of the chain. Higher voltage means higher PA output, higher current draw etc. This means you will need better swichthing FETS, better PA FETS, More heatsinks etc. Just buy a better amp.
#15
I think I will stay the same wire and turns as I`m just trying my hand at it on a cheaper amp.As for getting better ones i have tons and don`t realy need any more as most amps i have are vary hi-end and some vary vary rare I just like to dabble a bit
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05-07-2006 10:15 AM