Be careful with Rubycon ZA's, their good for digital supply decoupling but used in the signal for blocking DC may be a bit bright and sharp tbh
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Be careful with Rubycon ZA's, their good for digital supply decoupling but used in the signal for blocking DC may be a bit bright and sharp tbh
Thanks for the advice Leo. I should have asked before I bought them. I picked up the spec from this forum and simply searched for some that met that spec eg 16V 47uF.
Anyways, the overall result sounds pretty good.....
Leo, would you care to recommend an alternative cap?
Grateful for the benefit of your experience.
Ones to usually avoid for blocking DC is very low esr types and things like polymer as these can be electrically leaky and also tend to sound sharp (fine if thats what you want)
I don't have one of these dacs so never had chance to compare but the ones that are usually favoured by the diyer are
Silmic (have a smooth character, slightly warm , some say mellow) usually found on ebay, digikey and some of the online places offering upgrade parts
Panasonic ECA audiograde, the ones in a metalic blue sleeve (similar sounding to above, pretty safe sounding in the extremes ) can be had from Farnell
Blackgate , these are getting scarce now , quite expensive, places like Hificollective, Audiocom etc may still have some
They take an age to burn in (go through the forming process)
Nichicon FG or KZ, well priced but not easy to buy over here, sometimes seen on ebay etc, possibly digikey, not a bad cap for the money
You can also try general purpose available from Maplin etc, considered shite by the hard core diyer, some will say you can't hear a difference
Technically these will be the worse, poor HF etc
If you can't hear any difference between these and the audio classed ones I wouldn't worry about it
Because these caps have bias voltage on them most should be fine, I'd still avoid very low esr types though with the small exception of Panny FC
Yeah, someone over on the WHFSV site recommended Silmic too. Thanks for your advise.
I attempted the mod21 pt2 on a 7510 mk6/4. I used the LM4562MA opamp with CORNELL DUBILIER 220PF, 500V Caps. The sound is good and at first listen I was pleased with the results. As the DAC played I began to hear noise in the left channel. After stopping the source signal the noise continues in the left channel. The sound is like a muted popping. It is not a hum or the sharp static associated with loose connection. Any advice on how to start the trouble shooting process? I am a newbie and won't be insulted by people pointing out the obvious.
My 1st guess would be to suspect the LM4562 of having suffered a breakdown due to anti static handling issues. Also check for any signs of solder flux between the pins. Changing surface mount chips is a terrifying job.
Stan
It might be the flux. What should I use to clean it, alcohol and swab? I also have a 4032 coming. If I swap out the 4562 with it, are there any further considerations?Quote:
Originally Posted by Sensimilia
You'll need a 100nF ceramic cap between pin 4 and 8 of the IC. I use alcohol.
I cleaned the flux with alcohol and resolder one of the cap pins. Still had noise when I reconnected that continued when unit was turned off. The noise finally stopped when I disconnected the power. Surprisingly the noise stopped seconds after bein reconnected and has not returned. Everything sounds great. Must be a ghost in the machine.:scratch: