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Simplistic NJFET RIAA
Simplistic NJFET RIAA
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Old 23rd May 2010, 02:12 PM   #3711
Salas is offline Salas  Greece
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Simplistic NJFET RIAA
Quote:
Originally Posted by merlin el mago View Post
Gain x10, how many dB 20?
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Originally Posted by massimo View Post
Quote:
Originally Posted by merlin el mago View Post
@Salas
How many dBs?
20dB=x10 times. 30dB=x31.6 times. 40dB=x100 times. 50dB=x316 times. 60dB=x1000 times.
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Old 23rd May 2010, 02:15 PM   #3712
merlin el mago is offline merlin el mago
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Quote:
Originally Posted by Salas View Post
20dB=x10 times. 30dB=x31.6 times. 40dB=x100 times. 50dB=x316 times. 60dB=x1000 times.
I will print, another lesson than now I know, thank you Salas.

If need 26dBs can I add other SK170BL in parallel?
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Old 23rd May 2010, 02:34 PM   #3713
Salas is offline Salas  Greece
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No, gain isn't fixed like that. Its not power.
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Old 23rd May 2010, 02:37 PM   #3714
merlin el mago is offline merlin el mago
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It's possible do something similar for 26dBs?
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Old 23rd May 2010, 02:42 PM   #3715
Salas is offline Salas  Greece
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Yes, you just use 33R for R1, 1k6 for R2, and 12V for V1 battery or whatever. That will give 26dB=x20 times.
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Old 23rd May 2010, 02:49 PM   #3716
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Old 23rd May 2010, 09:51 PM   #3717
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Simplistic NJFET RIAA
Quote:
Originally Posted by Salas View Post
20dB=x10 times. 30dB=x31.6 times. 40dB=x100 times. 50dB=x316 times. 60dB=x1000 times.
Is there a formulae for that calc ?
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Old 23rd May 2010, 09:57 PM   #3718
Salas is offline Salas  Greece
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Gain=20log(Vout/Vin) dB
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Old 23rd May 2010, 10:24 PM   #3719
RCruz is offline RCruz  Switzerland
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So is this correct ?

48dB=x251times
57dB=x709times
63dB=x1406times
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Old 23rd May 2010, 10:40 PM   #3720
Salas is offline Salas  Greece
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48dB=251, 57dB=708, 63dB=1412 by windows calculator. Yes, correct.
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