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Old 8th November 2006, 09:08 AM   #4581
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Sorry but my amp DC blockign caps are gone also... even if it seems there is another DC security in.
I am looking for what voltage in the RCA? What is a normal value? When the CDP plays?

Thanks
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Old 8th November 2006, 09:12 AM   #4582
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Quote:
Originally posted by Malefoda
Sorry but my amp DC blockign caps are gone also... even if it seems there is another DC security in.
I am looking for what voltage in the RCA? What is a normal value? When the CDP plays?

Thanks


Click the image to open in full size.

Brent
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Old 8th November 2006, 09:14 AM   #4583
SimontY is offline SimontY  United Kingdom
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Quote:
Originally posted by 6h5c
paid 140 euros for it . I've been listening to it tonight, and i'm rediscovering my cd collection again!
Superb Ray, and even better for not using Neutrik Pro-fis, as I believe these are poor sounding phonos

Quote:
Originally posted by Malefoda
Guys,
where to check for DC offset at the output? and how?
I believe you simply put a multimeter, set to measure DC, from the output to ground. With the cd player turned on.

Simon

ps - anyone want to buy some Neutrik Pro-fi phono plugs?
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Old 8th November 2006, 10:01 AM   #4584
AndrewT is offline AndrewT  Scotland
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Quote:
Originally posted by rowemeister


The black gates needed are cheap mate. 4X 470uF 16V for the opamp or discrete are roughly 16.
220uf are even cheaper.

Brent
That's not cheap.
that's B..... expensive.
I can buy 15,000uF 63V electrolytics for less than that.
I can buy 470uF 16V electrolytics for about 0.055 that's more than 72times cheaper.
I can buy higher quality electros ranging in price from 0.13 upto 0.28. That's still 14times cheaper.
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Old 8th November 2006, 10:05 AM   #4585
6h5c is offline 6h5c  Netherlands
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Quote:
Originally posted by AndrewT
That's not cheap.
that's B..... expensive.
I can buy 15,000uF 63V electrolytics for less than that.
I can buy 470uF 16V electrolytics for about 0.055 that's more than 72times cheaper.
I can buy higher quality electros ranging in price from 0.13 upto 0.28. That's still 14times cheaper.
Me too! But those are not Black Gates...

Or am I missing the point here

Ray
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Old 8th November 2006, 10:06 AM   #4586
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I've found this:
http://tangentsoft.net/audio/input-cap.html

If I find something more than 3mv I put back the caps! I'll also check at the amp...
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Old 8th November 2006, 10:08 AM   #4587
poynton is offline poynton  United Kingdom
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Only the hype can justify the extraordinarily high prices of Black Gates.

Manufacturing costs must be about the same for all electrolytics.

Andy
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Old 8th November 2006, 10:09 AM   #4588
SimontY is offline SimontY  United Kingdom
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Quote:
Originally posted by AndrewT

That's not cheap.
that's B..... expensive.
I can buy 15,000uF 63V electrolytics for less than that.
I can buy 470uF 16V electrolytics for about 0.055 that's more than 72times cheaper.
I can buy higher quality electros ranging in price from 0.13 upto 0.28. That's still 14times cheaper.
Black Gates are expensive compared to other caps, but when considered as a valuable upgrade, like a clock or an interconnect, they offer very good value for money.

They are not a tool to get a job done, they are an upgrade over less expensive caps. The sound improvement for 25 is greater than you could get from almost anything else (apart from new op-amps or using hard cone feet, but we've already done that....)

Simon
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Old 8th November 2006, 10:22 AM   #4589
SimontY is offline SimontY  United Kingdom
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Quote:
Originally posted by Malefoda
I've found this:
http://tangentsoft.net/audio/input-cap.html

If I find something more than 3mv I put back the caps! I'll also check at the amp...
3mV is nothing. Even with a gain of 25 in your amp that's 75mV at your speakers. What will that do? Very little!!

Can anyone please confirm? Don't want to dispense incorrect advice!

Si
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Old 8th November 2006, 10:38 AM   #4590
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Malfodo, the Amp should have a coupling cap on its input in the circuit, if you are concerned you can also check the dc offset at the speaker terminals in exactly the same way, i bet you get zero !

Simon your right, probably wouldnt do anything apart from may be cause hum or coil heating, the speaker coil being bigger will tolerate it, but headphone coils are smaller and less dissipative, so be carefull with those Senheisers lol. Anyhows, i think the cd63 headphones is coupledanyhows, and if not Malfedo, what the hell is it still doing connected LOL, dump it you dont need it.

The CDP output listed at 2V is the music signal to put it simply, its the peak to peak or rms output of the music fed to the amp, not the dc offset. You would only have problems with dc offset if the amplifier was not coupled correctly at the input or the output. So just check offset at the speaker terminals to put your mind at rest, it will be fine im sure ( do use 911 orr 999 for the emergency services ?? ) lol

SIMON, how much for the neutriks, u can mail me some details if you want, subs757@msn.com.

Dennis
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