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Simplistic NJFET RIAA
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Old 20th January 2013, 03:54 PM   #9091
etoiledusoir is offline etoiledusoir  Canada
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Yes it is night star. In the 19th century people were refering to the same star with two dirrefent names. Etoile du soir and etoile du matin (morining star).

I'm refering to the shematic in the wiki:
Salas Simplistic NJFET Riaa Schematics - diyAudio

Sorry for the ambiguity. Maybe i'll be more clear if I describe what I really want to do.
I'm using for now the shure m97 cartdrige and I have a bunch of 2sk170 matched at 6-6.5 ma that I want to use.
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Old 20th January 2013, 03:55 PM   #9092
Salas is offline Salas  Greece
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Simplistic NJFET RIAA
Quote:
Originally Posted by RCruz View Post
Maybe you could decrease R13 (1k5) instead of increasing Voltage.
Not preferable. Its increasing it actually. Will lose gain, needs Rs mod, and he still needs more drainV in his second stage, it was low for good swing.
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Old 20th January 2013, 03:58 PM   #9093
Salas is offline Salas  Greece
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Quote:
Originally Posted by etoiledusoir View Post
Yes it is night star. In the 19th century people were refering to the same star with two dirrefent names. Etoile du soir and etoile du matin (morining star).

I'm refering to the shematic in the wiki:
Salas Simplistic NJFET Riaa Schematics - diyAudio

Sorry for the ambiguity. Maybe i'll be more clear if I describe what I really want to do.
I'm using for now the shure m97 cartdrige and I have a bunch of 2sk170 matched at 6-6.5 ma that I want to use.
Briefed clearly. Will reply in time and in detail.
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Old 20th January 2013, 03:59 PM   #9094
buzzforb is offline buzzforb  United States
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Salas,
can i not bring up the second stage drain voltage by lower rs? They did not have 43R in Smd, so i have a 33R and 10R in series.
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Old 20th January 2013, 03:59 PM   #9095
RCruz is offline RCruz  Switzerland
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Simplistic NJFET RIAA
[QUOTE=Salas;3334495] Its increasing it actually. QUOTE]

What do you mean Salas ?
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Old 20th January 2013, 04:01 PM   #9096
buzzforb is offline buzzforb  United States
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Lowering 1k5 would lower voltage and gain. Would need more degeneration ann less idss to ,aintain same gain level, correct
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Old 20th January 2013, 04:08 PM   #9097
Salas is offline Salas  Greece
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Yes.
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Old 20th January 2013, 04:10 PM   #9098
Salas is offline Salas  Greece
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[QUOTE=RCruz;3334503]
Quote:
Originally Posted by Salas View Post
Its increasing it actually. QUOTE]

What do you mean Salas ?
Its preferable to increase than to decrease much there for various reasons.
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Old 20th January 2013, 04:10 PM   #9099
RCruz is offline RCruz  Switzerland
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I am not understanding... lowering 1k5 can lower gain, but voltage at collector should rise
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Old 20th January 2013, 04:10 PM   #9100
Salas is offline Salas  Greece
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Buzz, have you got any 6.8R for Rs?
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