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Old 27th March 2010, 03:25 PM   #3431
maxpou is offline maxpou  Canada
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Hi Salas,
i have a few questions on the phono stage schematic.
1- Why you put 1W for R1, R10 and R11?
2- What's cap you use on Cout coupling? I have Solen MKP.
3- I did not found C9.
4- Somebody tried many value Rload for DL103?
5- C2 and C3 polystyrene or silver mica?

Thank you! Maxpou
Simplistic NJFET RIAA
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Old 27th March 2010, 03:48 PM   #3432
Salas is online now Salas  Greece
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1. Its a must, they dissipate over 250mW due to the large voltage drop. If not rated 3X dissipation, their noise and rudimentary distortion goes up, their silent life shortens.
2. Best you can have/pay. Bypass the Solen with 10nF Vishay MKP1837 or something equivalent & synergistic if you can. Obbligato is good for the money asked. Easily beats Solen. If the load driven is high, like 100k valve line pre, many 0.47-1uF good oils, wax, Teflon etc.
3. C9 is a 10n-100n bypass that was on the circuit drawing I worked on. Helps if there is RF and V1.0 shunt. Maybe gives problems with remote sensing. Try in and out in your final build.
4. Yes I have tried. DL103 basic model good on 500R-680R, DL103R good on 150-180R. In my system, my ears. Use 2 board pins for soldering load resistor, so to test some values easier.
5. 47n there is good polypropylene and 16n there is Russian Silver Mica.
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Old 27th March 2010, 05:26 PM   #3433
maxpou is offline maxpou  Canada
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Thank you Salas,
1- I will try a caddock MK132 0.75W
2- I drive my line stage with 10K shunt step attenuator. Maybe 3.3uF it's not enough. I will try Solen film and foil polypropylene because I did not found a distributor in Canada for Obliggato cap.
3- It's a bypass cap where?
4- Thank you for info!
5- Thank you too!

Maxpou
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Old 27th March 2010, 06:33 PM   #3434
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Quote:
Originally Posted by RCruz View Post
Looking good !

In the psu I see only two rectifiers per channel... Are these double ?

I am quite interested in your opinion regarding sikorel versus jensen....
Finally do the comparison between the sikorels vs jensen:

Sikorels more scene & all the music bigger than jensen, with jensen the music is more tight not so relaxed than sikorels, the focus in jensen are better but long sessions will be better sikorel, sikorels seems that you are most inside the music but jensen seems more precise with highs & sikorels is the winner in the mids & bass. The best: one mix of both.

If you have Jensen 4 pole 10.000uF/63V don't spend money with the Epcos Sikorel 10.000uF/63V or viceversa.

All depends what are you looking for: if you need more tight sound possible the best will be Jensen but if you need more open spound with more scene & relaxed sound your chance will be the Epcos Sikorel.
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Old 27th March 2010, 07:03 PM   #3435
Salas is online now Salas  Greece
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Quote:
Originally Posted by maxpou View Post
Thank you Salas,
1- I will try a caddock MK132 0.75W
2- I drive my line stage with 10K shunt step attenuator. Maybe 3.3uF it's not enough. I will try Solen film and foil polypropylene because I did not found a distributor in Canada for Obliggato cap.
3- It's a bypass cap where?
4- Thank you for info!
5- Thank you too!

Maxpou
2- 5.6-6.8uF
3- B+ to ground directly.
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Old 28th March 2010, 09:16 AM   #3436
massimo is offline massimo  Italy
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Quote:
Originally Posted by maxpou View Post
....because I did not found a distributor in Canada for Obliggato cap.
You can order them from HK through eBay. Search for Obbligato caps and Obbligato premium
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Old 28th March 2010, 06:12 PM   #3437
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Cool audio caps list compendium?

Has someone made a list, or compilation of good audio caps to use and sources? Thanks,
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Old 28th March 2010, 08:04 PM   #3438
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Quote:
Originally Posted by capritar View Post
Has someone made a list, or compilation of good audio caps to use and sources? Thanks,
Film or electrolytic?
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Old 28th March 2010, 10:46 PM   #3439
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Mostly film, since i was mostly thinking about coupling caps.
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Old 29th March 2010, 07:06 AM   #3440
massimo is offline massimo  Italy
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This link might be useful: Humble Homemade Hifi
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