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Simplistic NJFET RIAA
Simplistic NJFET RIAA
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Old 29th May 2012, 09:47 AM   #7701
AndrewT is online now AndrewT  Scotland
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Quote:
Originally Posted by Salas View Post
it really takes off when the second stage is starting to get pushed as a result.
do you mean as the output peaks approach rail voltage?
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Old 30th May 2012, 10:02 PM   #7702
Salas is online now Salas  Greece
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Simplistic NJFET RIAA
Not really, a few volts Pk-Pk are enough to produce 1% THD with high input capacitance JFETS and low degeneration (Rs) we use here for high gain and low noise reasons.
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Old 31st May 2012, 12:06 AM   #7703
ra7 is offline ra7  United States
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Simplistic NJFET RIAA
Salas, do you have any ideas for a balanced phono stage?
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Old 31st May 2012, 12:21 AM   #7704
Salas is online now Salas  Greece
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Simplistic NJFET RIAA
You would just need to rearrange in diff amp mode the whole thing. 3dB more noise, but you can double up on input fets for MC that noise counts.
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Old 4th June 2012, 09:48 AM   #7705
atupi is offline atupi  Romania
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Any opinions about this capacitor RARE!!! 0.047uF 200V PIO Capacitors K40Y-9 Lot of 10 pcs. | eBay
for interstage connection ?
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Old 4th June 2012, 11:46 AM   #7706
merlin el mago is offline merlin el mago
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For interstage can be good, for RIAA NO. I use FT-3.
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Old 4th June 2012, 04:09 PM   #7707
Milos P. is offline Milos P.  Serbia
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I used Russian PIO 47nF(K42-U2) for RIAA but matched them to less than 0.5% with LCR meter. If you can match them, you could use them. The sound you may or may not like, for me , those in the direct signal path are a bit too much colored, bypassing them with good PP might sound interesting.
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Old 4th June 2012, 04:20 PM   #7708
Salas is online now Salas  Greece
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Simplistic NJFET RIAA
They are a bit dark PIO but smooth. Like Jensen but without the accent. They love Teflon bypass. Add BIG subjective anecdotal IMHO non scientific caution sign of course.
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Old 4th June 2012, 05:14 PM   #7709
Milos P. is offline Milos P.  Serbia
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I'm still playing with my RIAA.The last mod is that I changed R1/10R/2W to 5R.
Like it very much and
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Originally Posted by Salas View Post
Add BIG subjective anecdotal IMHO non scientific caution sign of course.
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Old 4th June 2012, 07:17 PM   #7710
Salas is online now Salas  Greece
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Simplistic NJFET RIAA
You doubled the reg's CCS current to hot-rod you mean?
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