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BC550 BC560 Very low noise RIAA
BC550 BC560 Very low noise RIAA
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Old 23rd January 2007, 01:52 PM   #41
sinigersky is offline sinigersky  Germany
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Has anyone tried the RIAA preamp? I am also interested in building one.
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Old 23rd January 2007, 05:11 PM   #42
AndrewT is offline AndrewT  Scotland
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Hi,
I don't know if anyone has built it, maybe not even the designer!
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Old 5th June 2008, 08:01 AM   #43
lineup is offline lineup  Sweden
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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
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File Type: png bc550-560-superlownoise-riaa-v1.0.png (27.1 KB, 1434 views)
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Old 5th June 2008, 08:43 AM   #44
GlidingDutchman is offline GlidingDutchman  South Africa
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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
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Old 5th June 2008, 10:43 AM   #45
peranders is offline peranders  Sweden
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BC550 BC560 Very low noise RIAA
I'll guess you have to trouble shoot then. Have you checked the currents in the amp?
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Old 5th June 2008, 10:53 AM   #46
GlidingDutchman is offline GlidingDutchman  South Africa
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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
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Old 5th June 2008, 02:13 PM   #47
jam is offline jam  United States
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Anyone consder using two of these gain blocks with passive eq between them or a split with passive and active eq?

Jam
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Old 5th June 2008, 02:25 PM   #48
peranders is offline peranders  Sweden
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BC550 BC560 Very low noise RIAA
Check my sig below
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Old 5th June 2008, 02:27 PM   #49
jam is offline jam  United States
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When will you have it finished?

Jam
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Old 5th June 2008, 07:19 PM   #50
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
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BC550 BC560 Very low noise RIAA
If you click at the link you can read all about it.
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