BC550 BC560 Very low noise RIAA - Page 5

sinigersky · 23rd January 2007, 01:52 PM

Has anyone tried the RIAA preamp? I am also interested in building one.

AndrewT · 23rd January 2007, 05:11 PM

Hi,
I don't know if anyone has built it, maybe not even the designer!

lineup · 5th June 2008, 08:01 AM

Quote:

Originally posted by lineup

This low noise riaa
is easy to build - opamp style with common transistors
and will have very great performance - if my sims are somewhat correct.

I think a good PCB prototype silksheet
would be of interest and use for 'Analogue people'
.

Now

when the hype of the day is about Low Noise
this project is interesting.

It shows what we can do by using low cost transistors
---> in parallell
to achieve reduced input noise

Quote:

2T - 3dB
4T - 6dB lower noise, as used in my symmetrical design here ~ half the noise
8T - 9dB
16T - 12 dB, same as 1/4 of noise of 1T

Lineup

good & low cost audio regards

GlidingDutchman · 5th June 2008, 08:43 AM

Quote:

Originally posted by peranders
It looks like the Elektor SUPA, decades ago.

It is indeed - more-or-less.

Just a week ago I fiddled with this circuit (Elektor) but I got no sound from my modules...

D

peranders · 5th June 2008, 10:43 AM

I'll guess you have to trouble shoot then.

Have you checked the currents in the amp?

GlidingDutchman · 5th June 2008, 10:53 AM

Quote:

Originally posted by peranders
I'll guess you have to trouble shoot then. Have you checked the currents in the amp?

Chucked it in the parts bin... I now use an EAR 834P from a friend!

I am just not that good at understanding electronic circuits...

D

jam · 5th June 2008, 02:13 PM

Anyone consder using two of these gain blocks with passive eq between them or a split with passive and active eq?

Jam

peranders · 5th June 2008, 02:25 PM

Check my sig below

jam · 5th June 2008, 02:27 PM

When will you have it finished?

Jam

peranders · 5th June 2008, 07:19 PM

If you click at the link you can read all about it.

23rd January 2007, 01:52 PM	#41
sinigersky diyAudio Member Join Date: Sep 2004 Location: Germany	Has anyone tried the RIAA preamp? I am also interested in building one. __________________ GeleTheMaster / SINIGERSKY AUDIO

5th June 2008, 10:43 AM	#45
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	I'll guess you have to trouble shoot then. Have you checked the currents in the amp? __________________ /Per-Anders (my first name) or P-A as my friends call me Tube Buffered Gainclone in work \|Thread

5th June 2008, 02:25 PM	#48
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Check my sig below __________________ /Per-Anders (my first name) or P-A as my friends call me Tube Buffered Gainclone in work \|Thread

5th June 2008, 07:19 PM	#50
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	If you click at the link you can read all about it. __________________ /Per-Anders (my first name) or P-A as my friends call me Tube Buffered Gainclone in work \|Thread

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23rd January 2007, 05:11 PM	#42
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, I don't know if anyone has built it, maybe not even the designer!

5th June 2008, 02:13 PM	#47
jam diyAudio Member Join Date: May 2001 Location: Charlotte,NC,USA	Anyone consder using two of these gain blocks with passive eq between them or a split with passive and active eq? Jam

5th June 2008, 02:27 PM	#49
jam diyAudio Member Join Date: May 2001 Location: Charlotte,NC,USA	When will you have it finished? Jam

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