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Old 13th December 2004, 01:01 PM   #31
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Quote:
Originally posted by costiss
hope those nasty yellow caps are not tantalum... otherwise try some starget/ panasonic instead....... good work ...

Look like standard tantalum bead caps to me.
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Old 13th December 2004, 01:20 PM   #32
brianuk is offline brianuk  United Kingdom
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Don't Naim use tants on their(expensive) 317 based PSU's eg HICAP's etc ?
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Old 15th December 2004, 01:01 PM   #33
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might be... but: tantalum are low ESR at relatively high freqs... what is needed IS A SMOOTH ESR and impedance capacitor throughout the audio spectrum.. caps like starget cerafine etc are designed for this... you could see why generic low esr caps arent suitable using them in a psu with quite a current demand at ~100-200 Hz.. (a power amp maybe).. after a while theyll be hot... joules law.. esr in low freqs is high enough consume to consume power and raise the temperature.. how much are cerafines in n.z.? here the 100u 35V is about 2 euro (quite expensive..)...
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Old 15th December 2004, 02:11 PM   #34
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Quote:
Originally posted by costiss
hope those nasty yellow caps are not tantalum... otherwise try some starget/ panasonic instead....... good work ...
a while back I posted on the use of tantalum caps with voltage regulators -- I used the Linear Tech LT1964 and LT1761 ULN regulators and the circuit just wouldn't work correctly with surface mount alum electrolytics, but when I substituted through-hole tantalums in their place (since that's all I had) made the devices work to spec.

this could have been a problem unique to my application..
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Old 15th December 2004, 09:13 PM   #35
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check if theres another problem r.f. layout - pcb or something... those things (regs) arent that sensitive....
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