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Old 14th November 2010, 05:33 PM   #5241
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Quote:
Originally Posted by RCruz View Post
I have been experimenting with decoupling caps in my 48dB riaa and I am amazed by the results.... these caps influence tone (I knew that) but they also influence noise...

After replacing the 330u decoupling caps by 680u BG N, the noise went down to the point where I can no longer hear it..... Is it possible or is there any other reason ?
Do you use also Sala's shunt regulator?
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Old 14th November 2010, 05:56 PM   #5242
RCruz is offline RCruz  Switzerland
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Originally Posted by Joshua_G View Post
Do you use also Sala's shunt regulator?
Hi Joshua

Of course I do.....Salas shunt and Salas riaa go together.... I believe they were designed to work as a complete system.
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Old 14th November 2010, 06:02 PM   #5243
RCruz is offline RCruz  Switzerland
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Originally Posted by merlin el mago View Post
Ricardo you you have two possibilities depending what are you looking for:

1-Less noise can reached paralleling two BG N "L-Cancelling Pairs" so + one cap to - other cap, look for at the Michael Percy pdf. web

2-N series are very very low noise so very very transparents, if you like more body I will try BG standard 470uF 160V you will be near near heaven

Let me know?
Hi Merlin

I tryed SilmicII 470u and got those nice bass / upper bass but lacking snap in the highs.

Than I used 330u BG std as well as 470u BG std.... very similar results.... maybe 330 is a little faster but noise is equal to the Silmic.

When I swaped for the 680u BGN I got much lower noise.... incredible.... it is so silent I can turn the volume full up and almost hear nothing..... So I am wondering if another nonpolar might do the same.... Nichicon nonpolar are quite inexpensive.... do you know if those are ok ?
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Old 14th November 2010, 06:04 PM   #5244
RCruz is offline RCruz  Switzerland
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Quote:
Originally Posted by merlin el mago View Post
Balanced ready to adjust, 1st attempt only with two old regs. V1.0 RS

Click the image to open in full size.
What are those silmics for ?
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Old 14th November 2010, 06:45 PM   #5245
Salas is offline Salas  Greece
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Originally Posted by merlin el mago View Post
I used Pana FM & Muse KZ & isn't the same.
Weren't they both adequate? Was it noisier with one over another?
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Old 14th November 2010, 07:23 PM   #5246
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Quote:
Originally Posted by RCruz View Post
Hi Merlin

I tryed SilmicII 470u and got those nice bass / upper bass but lacking snap in the highs.

Than I used 330u BG std as well as 470u BG std.... very similar results.... maybe 330 is a little faster but noise is equal to the Silmic.

When I swaped for the 680u BGN I got much lower noise.... incredible.... it is so silent I can turn the volume full up and almost hear nothing..... So I am wondering if another nonpolar might do the same.... Nichicon nonpolar are quite inexpensive.... do you know if those are ok ?
I see you are looking for less noise so only I can suggest do it "L-Cancelling Pairs" with BG N series, you need only 4 caps more to try...
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Old 14th November 2010, 07:26 PM   #5247
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Originally Posted by Salas View Post
Weren't they both adequate? Was it noisier with one over another?
My opinion is subjective but surely are less noise the BG.
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Old 14th November 2010, 07:28 PM   #5248
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Originally Posted by RCruz View Post
What are those silmics for ?
I use caps that I have on hand so Nichicon KZ & Elna Silmic II for 1st aproach & set up, once all is going on well I will change for BG.
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Old 14th November 2010, 09:12 PM   #5249
RCruz is offline RCruz  Switzerland
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In your schematic, those silmics serve what purpose ?
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Old 15th November 2010, 08:50 AM   #5250
Thomo is offline Thomo  United Kingdom
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Ricardo, have you tried bypassing a Silmic II with a small Polyprop? I like Silmic + Vishay MKP1837 in some places.

One channel of my RIAA finished by the way guys, just haven't had time to test and build the other channel yet.

Cheers, Lee.
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