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Old 26th October 2007, 10:22 PM   #8151
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Quote:
Originally posted by Thomo
I managed to squeeze my S-Power reg into the dac analog today. I have sat for the last three hours listening. I must admit I was skeptical before whether the improvement of my Invisus would be as good as you said Brent. But it was.

I know some of the benefits are from splitting the dac & decoder analog from each other, but still. Those little regs are very impressive. There's no wonder Simon likes them so much. I can't imagine how good your player must sound Brent.

Cheers,

Lee.

It won't need a heatsink here will it?
Thanks Lee

Hours of design and testing showing its worth. I really should be charging 99 like Audiocom shouldn't I LOL

Glad you like them. Now just imagine your opamps running off them

cheers
Brent
SPOWER REGS
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Old 26th October 2007, 10:27 PM   #8152
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Quote:
Originally posted by Thomo

Lol. After fitting that S-Power reg, my missus walked in and asked me if I'd fixed my subwoofer. I have but it wasn't switched on!

Lee.
Good girl, give her a big kiss from me

Brent
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Old 26th October 2007, 11:21 PM   #8153
Thomo is offline Thomo  United Kingdom
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Quote:
Originally posted by rowemeister


Good girl, give her a big kiss from me

Brent

Lol. Sorry to disappoint. She was ready to have a go, she hates the thing!

And yes, the bass really has improved that much. Those regs are great, there's just so much more detail and dynamics. I'm sure Simon can vouch for this also.

Lee.
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Old 27th October 2007, 05:35 PM   #8154
ade.d is offline ade.d  United Kingdom
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hi all,wheres the best place to buy spare laser units for my cd63 ki.cheers ade.
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Old 27th October 2007, 07:04 PM   #8155
SimontY is offline SimontY  United Kingdom
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Quote:
Originally posted by Thomo
And yes, the bass really has improved that much. Those regs are great, there's just so much more detail and dynamics. I'm sure Simon can vouch for this also.
Sure can Lee! The dynamics really come out when using the regs on the output stage, and the detail comes out using it on the DAC and from using a C1 on the servo.

Overall, more good regs and separation of psu rails gives detail, impact and a very natural sound.

The value for money is terrific too. Compare to changing speaker cable: I just changed my Kimber 4PR to double-8TC (16x the price new) and the change is pleasant but very subtle. One well-placed 35 regulator makes a lot more difference.

Simon
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Old 27th October 2007, 07:04 PM   #8156
6h5c is offline 6h5c  Netherlands
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Default Re: Os Con

Quote:
Originally posted by reddish75
hi i think that this is more a question for ray, but any help would be appreciated as my knowledge is limited, having just purchased the new ezdac pcb, im thinking of connecting it directly to the 12s output of the player, and i was also thinking of using your output stage rather than the output stage on the ezdac, does anyone have any ideas of the best way to do this?

thanks

chris
If you leave out all the parts around and including the CS8416, and the 100 ohm resistors that feed data to the ASRC (R18...R21), you can use those pads to connect the I2C signal from the player's decoder. Should work o.k., i'm going to try this too with my next PCB in a CD67, see how that sounds :-).

The output stage is another thing, it's made for voltage output DACs, and as Evan already explained the 1794 is current output. You could experiment a bit and use the two 25 ohm resistors to do the I/V conversion and then connect this signal to both inputs of the output stage. You don't need the passive filter.

Quote:
Originally posted by RCruz
Hi Ray

I have two OsCon Sprague 220uF 10V and would like to experiment them...

Can I swap C124 on Servo VREF output with one OsCon?

After I replaced C135 / 138 (Q105) Sled + LD and C153 / 154 (QM01) Disc Motor Driver with 120uF 16v Pana FC, I noticed an increase of detail and low end power, but now the player tends to skip sometimes....

Can you help ?

Regards

Ricardo
Yeah, why not, experiment all you want I would say. I don't think there will be much effect from the Vref though, but who knows...

I can't explain the skipping, as those caps should be ok over there. Maybe it's a coincidence caused by handling the transport. Try refitting the flatcables and cleaning & lubricating the metal slider-rod.

Regards,

Ray
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Old 27th October 2007, 07:06 PM   #8157
Glenn2 is offline Glenn2  United Kingdom
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CPC are your best bet, being part of Farnell.

There are some shady ones around, and many have been burnt buying from Grandata (me for one) and Nikko/Dalbani.

CPC list two varieties though - which confuses me.... Brent?

Edit: Search for VAM1202
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Old 27th October 2007, 07:50 PM   #8158
ade.d is offline ade.d  United Kingdom
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thanx for the reply,and your right.do they both fit?
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Old 27th October 2007, 10:16 PM   #8159
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Default i/v conversion with a resistor

hi ray thanks for your answer, i dont see any potential problems using a resistor for i/v conversion (but i am very new at this) as long as all the voltages are correct, however do you think that this will affect soung quality?
Plus its only a concederation as i dont really like using op-amps

thanks

chris
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Old 28th October 2007, 09:50 AM   #8160
6h5c is offline 6h5c  Netherlands
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Default Re: i/v conversion with a resistor

Quote:
Originally posted by reddish75
hi ray thanks for your answer, i dont see any potential problems using a resistor for i/v conversion (but i am very new at this) as long as all the voltages are correct, however do you think that this will affect soung quality?
Plus its only a concederation as i dont really like using op-amps

thanks

chris
Hi Chris,

The ezDAC sounds very good in its current configuration, with the opamps. But I don't see any reason why you couldn't use the discrete output stage. Sound quality should at least be the same or better, especially the mid-high region will become more fluid. But you need a good separate supply though, because the output stage is single ended. Any noise on the power lines will be directly transferred to the output. You may have to adjust the gain by changing the emitter resistors of the differential input. The two I/V voltages will be summed, just as with the opamp, and the rest should be ok.

Ray
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