Vout approx. 15 - 15.5
Hi here.
I'm building DimDim's dual AK4490 DAC, and i need 15 - 15.5 vout (100mA) for the output stage.
I have the chance to buy an R-core transformer with 20-0-20 / 30VA (2x15w), for cheap, but ideal would ofcourse be a little lower.
The outputstage should be running in class A 100mA so i will be setting the ultrabib to ~175-200mA range.
Lucky me i have the pf5102's from my other shuntbuild some years age.
Any considerations with this transformer, or is it good to go?
Rgds; Jesper.
Hi here.
I'm building DimDim's dual AK4490 DAC, and i need 15 - 15.5 vout (100mA) for the output stage.
I have the chance to buy an R-core transformer with 20-0-20 / 30VA (2x15w), for cheap, but ideal would ofcourse be a little lower.
The outputstage should be running in class A 100mA so i will be setting the ultrabib to ~175-200mA range.
Lucky me i have the pf5102's from my other shuntbuild some years age.
Any considerations with this transformer, or is it good to go?
Rgds; Jesper.
yeah, comes from US. Delivery takes roughly 1 week from ordering which seems fairly quick, though RS will always be quicker too.
Hi...
I got the trafo for my ultrabib's build i ordred from Audiophonics today!
(along with my Amenero usb board
)...
This is a little embarrising to ask, but i have had some problems before with trafo hookup's.
It's a centertapped R-core transformer and i plan to just hook it up, like i would have hooked up an dual secondary except, the positive and negative shunt would share the centertap on theyre AC-inputs.
Is it okay ?
Rgds; Jesper.
I got the trafo for my ultrabib's build i ordred from Audiophonics today!
(along with my Amenero usb board
)...This is a little embarrising to ask, but i have had some problems before with trafo hookup's.
It's a centertapped R-core transformer and i plan to just hook it up, like i would have hooked up an dual secondary except, the positive and negative shunt would share the centertap on theyre AC-inputs.
Is it okay ?
Rgds; Jesper.
Attachments
I do not think you can share the common '0' as the neutral on both the Ultra BiB boards. These boards accept independent secondaries from the transformer. So I think you either need to buy another transformer with 0-20v, 0-20v dual secondaries or just use one of the white and black for a single BiB board.
Unless someone makes an own dual polarity UBiBs board where he uses single bridge configuration, or outsourcing the rectification sections to a single bridge external raw DC unit, the normal boards need independent secondaries. Two bridges and dual secondaries are the better (and more expensive) choice of course.
Do your own rectification section with four diodes only, link the C1 reservoirs zeroes.
Top cap (-) pin with bottom cap (+) pin. The loads represent the rest of regs circuits.
Top cap (-) pin with bottom cap (+) pin. The loads represent the rest of regs circuits.
An externally hosted image should be here but it was not working when we last tested it.
I did have a look, but i cannot see excatly how they are winded up; think it's on two bobbin's. one with primary windings, and the other with two layers of secondarys.
I will see what they have to say, they proberly first reply monday, but again i have no rush; haven't got mine boards yet
Nice to hear from you guy's btw...
Jesper.