UCD180 questions

[Hans L]

Originally posted by Jan-Peter
Stef1777,

Very good setup, the BHC slit foil is HIGHLY recommended.

Regards,

Jan-Peter

Jans-Peter,
do you know a selling point in the netherlands? Apparently http://www.ave-nl.com/ sells them, but the website does not strike me as being for endusers who only want a couple of caps.

Can you recommend other brands? Hoe about the readily available caps like Philips?

Thanks,
Hans.

[pa]

Hi !
for the power supply of a 180ucd monoblock i was thinking using one cap philips 114 63v 10000uF per rail.
http://www.vishay.com/docs/28351/114115pe.pdf
or the latest version 106 series.
http://www.vishay.com/docs/28384/106pedst.pdf
somebody try those caps ?
Pa.

[classd4sure]

Hi,

From what I can tell of the specs they look worthy of a try.

[Hans L]

Jan-Peter,

Snorry for the typoo, swomtimes my flingers get tangled in the kyeboardn.

The reason I mentioned Philips is that I've on more than one occasion from experienced diy/pros that Philips caps are very high quality for a reasonable price. True?

[matjans]

en het gave is dat ze nog steeds Philips' Gloeilampenfabrieken NV heten!

(and the cool thing is, officially they're still called 'Philips Incandescent-lamp Manufacturers Ltd.'!)

Hans, if you know where to get them, i'd like a few. Let me know if you can get your hands on 'em.

/matti

[Hans L]

I have bought big philips caps for psu in the past at Display in Utrecht, but the decided to stop selling to endusers a while ago. I'm assuming I can get my hands on them in Utrecht at Radio Centrum Electronica in the town centre. I may have time o visit them next thursday (got to get some other stuff as well), but give them a call if you want to find out quickly what they have.


So who do I have to blow around here to get an opinion on psu caps?

[Hans L]

Here's a link (hope it's not a temp/dyn address for browsing the catalog) to philips caps at display.nl I was refering to:
Philips caps

Cheers,
Hans.

[FuriousD]

Hi All,

I know that the debate has been raging here about the op-amp at the front of the UCD400 and can be put as AD8620, this may not be the saviour we all think. Because of the compensation scheme used for the op-amp, the AD8610/AD8620 parts have a pretty high LF noise corner and are much much worse than most other competitive low noise bipolar amplifiers in this application. This results in a rise in noise floor in the bass region and is pretty damned audible. The JFET input is nice because of the lack of RF folddown compared to bipolar, but it doesn't outweigh the bass problem.

Simple fact - Good bass is a fundamental to good hi-fi!

Suggest that we all look at a discrete differential stage that will not degrade the sound on the UCD. Anybody got any tried and tested circuits here to try?

F.

[Hans L]

No answers to my question yet. Is this because:
1) this question has been asked and answered ad nauseum;
2) I am supposed to ask them elsewhere;
3) there is a complete lack of knowledge on Philips caps;
4) there is a complete lack of sense of humour.

[classd4sure]

hmmmmm 1, 2, 5 (you're not my type), and 6 (maybe they haven't tried them, since you asked about a few specific caps).

If you go through this thread you'll find alot about what makes a suitable cap for a power supply, not so much about which cap to use.... it is DIY after all. The specs look real good on those though, I'd give em a try.

This thread has grown to insane proportions as well (did you read it all? Seems few else want to either, it's hell to search through when you know what's there.)

For that reason you should try asking future PSU questions in this thread:

Optimal supply design for UCD and Zappulse modules

Cheers