What kind of transformers I need?

ttr · 7th February 2010, 10:56 AM

OK, here comes a dumb question.

I need a transformer(s) for these regulators in the same case:
- LT1085 for TA2024 board
- LM317/337 for op-amp based active filter

I guess I'll use:
1 pcs 60VA 1x12V
1 pcs 15VA 2x12V

Options?

Minion · 7th February 2010, 06:37 PM

Why do you need different Windings of the same Voltage ?? Wouldn"t a 75va 2 x 12 work just as well ??

paulb · 7th February 2010, 09:09 PM

And you can use a much smaller transformer. What DC current will each of your circuits draw?

ttr · 8th February 2010, 12:37 PM

TA2024 should play along with 2A and I need about 120mA for the op-amps (12 pcs). When using single 2x12V transformer the major current draw would be on the other winding. I guess that's only a psychological issue..

7th February 2010, 10:56 AM	#1
ttr diyAudio Member Join Date: Nov 2005	What kind of transformers I need? OK, here comes a dumb question. I need a transformer(s) for these regulators in the same case: - LT1085 for TA2024 board - LM317/337 for op-amp based active filter I guess I'll use: 1 pcs 60VA 1x12V 1 pcs 15VA 2x12V Options?

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7th February 2010, 06:37 PM	#2
Minion diyAudio Member Join Date: May 2006	Why do you need different Windings of the same Voltage ?? Wouldn"t a 75va 2 x 12 work just as well ??

7th February 2010, 09:09 PM	#3
paulb diyAudio Member Join Date: Jun 2001 Location: Calgary	And you can use a much smaller transformer. What DC current will each of your circuits draw?

8th February 2010, 12:37 PM	#4
ttr diyAudio Member Join Date: Nov 2005	TA2024 should play along with 2A and I need about 120mA for the op-amps (12 pcs). When using single 2x12V transformer the major current draw would be on the other winding. I guess that's only a psychological issue..

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