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Hi Twisted Pear Audio I have just received the B3 incl Trident combo kit. As I can see from the Trident regulators no Filter Cap is used on the Trident regulators. What is max capicance allowed on the Output of the Trident regulators? Edited by user Wednesday, January 4, 2012 3:50:33 AM(UTC)
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Its a shunt regulator - they normally don't have large values at outputs(the bypass caps at the B3 itself serve this role). But you can safely add up to 100uf.
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hello
someone tested adding caps on the avcc and the tridents with signifant improvement in resolution as a result;
what sort of caps would be the ideal choice; ceramic, BG, FC, Oscons and any idea about value except from the up to 100µF bit?
best
Leif
Norway
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I've used regular 47uF low-ESR electrolytic capacitors that was available in the store.
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yes
the Q is what they actually recommend
best
Leif
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I don't really have a recommendation as I don't do it. :)
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ok
but someone reported better resolution by doing it and there´s written something about the hf surpression characteristics of the tridents on another forum, that they´re weakening significantly the higher you get
comments?
best
Leif
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2x 47 uf BG NX High Q and 1x 100 nf. BG High Q. Ceramic is needed in Digital part. In analog it destroys good sound.
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Originally Posted by: Erlend Sæ 
2x 47 uf BG NX High Q and 1x 100 nf. BG High Q. Ceramic is needed in Digital part. In analog it destroys good sound.
Can you post any B3 DAC measurements with oscilloscope/soundcard/... what these types of capacitors will improve? Edited by user Thursday, February 2, 2012 5:12:53 AM(UTC)
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Originally Posted by: Erlend Sæ
2x 47 uf BG NX High Q and 1x 100 nf. BG High Q. Ceramic is needed in Digital part. In analog it destroys good sound.
isn´t that an excessively large cap for the frequencies we´re talking about here? I´d thought you´d get away with 100nF HiQ ? best Leif PS I´m not @link......whatever
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christensenleif@msn.com wrote:Originally Posted by: Erlend Sæ
2x 47 uf BG NX High Q and 1x 100 nf. BG High Q. Ceramic is needed in Digital part. In analog it destroys good sound.
isn´t that an excessively large cap for the frequencies we´re talking about here? I´d thought you´d get away with 100nF HiQ ? best Leif PS I´m not @link......whatever Maybee but it works perfect for me ! 
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miero wrote:Originally Posted by: Erlend Sæ
2x 47 uf BG NX High Q and 1x 100 nf. BG High Q. Ceramic is needed in Digital part. In analog it destroys good sound.
Can you post any B3 DAC measurements with oscilloscope/soundcard/... what these types of capacitors will improve? Sorry no measurements to show . They just make it sound better. However I have been told about problems around 600 khz. Maybee a friend of me will show them. He is working on the Buffalo III.
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@600K I think 100nano would probably be enough
I´ll try some HiQ 0,1µF saturday
best
Leif
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Let us know ! At this time my EZ dac with PCM 1794 A , Legato 1.03. and Dexa discret opamp sounds better than Wolfson Double mono and Buffalo II . With the Vishay Dale resistors it was not ok ! They sound hard in the upper midrange low treble. I do not like those Vishay at all !
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If I were going to use a cap I would choose a single good very low ESR 10-47uf. Larger will not be better.
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Russ White wrote:If I were going to use a cap I would choose a single good very low ESR 10-47uf. Larger will not be better. thxs will try have a nice weekend best rgds from frosty Norway Leif
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I'm now running it with 220nF film at the AVCC shunt output.
Still listening..
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avr300 wrote:I'm now running it with 220nF film at the AVCC shunt output.
Still listening.. Isn't that the same value (+/-) as the bypass cap at the pin? I think the discussion is whether or not a "reservoir" size capacitor at the output of a shunt will improve sonics... Perhaps one can use 10 uF, 1 uF, .1uF, 10n, 1n in parallel in order to widen the frequency range of the bypassing. Edited by user Friday, February 3, 2012 12:05:21 PM(UTC)
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The question is if those capacitors are really needed for you. In my case I was observing some randomly moving noise bands at -90dB level using Baudline analyzer when DAC output was connected into PC soundcard. Then I took oscilloscope and measured oscillating voltage on AVCC output. After consultation with Russ I've added low ESR 47uf capacitors. The moving noise bands and oscillations are gone now. Do you measured something unwanted? Or at least do you listen artifacts in the sound? If not, adding those capacitors might not improve the performance. The "better" and "improve" is relative to subject preferences. Sometimes distortions are much nicer than clean signal. Be aware of that. Edited by user Friday, February 3, 2012 12:30:41 PM(UTC)
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