hmm.. this seems to be the place to ask about transformers.... so.. I have a quetion.. 🙂
Can I use THREE centre tapped transformers in series with the centre tap of the middle transforer as earth to get +- rails? 🙂
Thanx 🙂
Can I use THREE centre tapped transformers in series with the centre tap of the middle transforer as earth to get +- rails? 🙂
Thanx 🙂
I wind about 80 turn's and the voltage drop from 42 V to 38 V , it's normaly ?
I wind to much ? or to less ?
Thanks
I wind to much ? or to less ?
Thanks
that's pretty normal...just be careful with the windings...when u affix the trafo...dun short them out~!!!
anyone else have anything to say about 3 transformers in series? 🙂 also... I have something of a voltage problem... heh... any ideas? 3 transformers..... all the same.. in series (assuming this will work) its 2 x 120V primary, 2 x 9V secondary 250VA.....any ideas to give me about +-30 to +-35 volts from three in series? 🙂 THANX! my calculations say I'd get +-38 volts... perhaps I'll just use this.. 🙂 THANX AGAIN!! lol I'll just try it with +-38 volts.. lol
Hi ,
I open the treadnd not only for my problem , if anyone else have probleme's fell free to share them with us !
I open the treadnd not only for my problem , if anyone else have probleme's fell free to share them with us !
darkm4n:
That amplifier will only do 200W/8R with ±40V supplies.
Just buy the recommended 32-0-32V 8A transformer.
Even if you had a fully regulated supply it couldn't deliver 350W/8R, even driven into saturation the outputs drop about 3V, and the emitter resistors also drop voltage, the drive circuit drops voltage, etc.
That amplifier will only do 200W/8R with ±40V supplies.
Just buy the recommended 32-0-32V 8A transformer.
Even if you had a fully regulated supply it couldn't deliver 350W/8R, even driven into saturation the outputs drop about 3V, and the emitter resistors also drop voltage, the drive circuit drops voltage, etc.
Another question.... MAINS FUSES!!! I will put one for each transformer.. 🙂 what rating? 250VA transformer.. 🙂....
Re: Ok .
You did 80 windings to get from 42 to 38. How many do you think will get you 60 windings? (Hint: It's 20 windings per volt. So 60 give you another 3 volts, you get 35 volts). And dont forget a liberal use of insulating tape between layers and on top!
Jan Didden
darkm4n said:
You did 80 windings to get from 42 to 38. How many do you think will get you 60 windings? (Hint: It's 20 windings per volt. So 60 give you another 3 volts, you get 35 volts). And dont forget a liberal use of insulating tape between layers and on top!
Jan Didden
You are litterally playing with fire if you don't do it right!
Please buy another and save this one for another project or sell it to buy the other one.
As far as three transformers in a series, you must get the phasing right or you might have a problem(read bang).
Please buy another and save this one for another project or sell it to buy the other one.
As far as three transformers in a series, you must get the phasing right or you might have a problem(read bang).
markp said:You are litterally playing with fire if you don't do it right!
Please buy another and save this one for another project or sell it to buy the other one.
As far as three transformers in a series, you must get the phasing right or you might have a problem(read bang).
yeah.. I knew I had to get the phasing right.... not sure there will be a bang if I get it wrong... 🙄
Yeah...for you you have to phase it correctly...for the other..he has to get it outta phase...wad a world...
Nope
I own a 500 VA transformer .
After my winding the aperadge of thea xformer drop ?
If i get it to 32 V - 0 - 32V i think it would be fine , unless the amperadge drop .. i really don't know
I can't find a 32 V x2 traf ..
I own a 500 VA transformer .
After my winding the aperadge of thea xformer drop ?
If i get it to 32 V - 0 - 32V i think it would be fine , unless the amperadge drop .. i really don't know
I can't find a 32 V x2 traf ..
Or ...
If the extra wind don't work i just wind a new toroidal ...
I made this in the past , but the number of wind and the exact position , etc .. was given by a friend .
If the extra wind don't work i just wind a new toroidal ...
I made this in the past , but the number of wind and the exact position , etc .. was given by a friend .
hmm... yes.... okay..... I need some money for transformers, brigde rectifiers, and capacitors..... hmm.....
good luck with ya powersupply... 🙂
I think I'll use 2 bridges.... does connecting three 250VA transformers in series basically result in 750VA? (don't tell me it doesn't, cos I don't wanna know)
good luck with ya powersupply... 🙂
I think I'll use 2 bridges.... does connecting three 250VA transformers in series basically result in 750VA? (don't tell me it doesn't, cos I don't wanna know)
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