Simplistic NJFET RIAA - Page 771 - diyAudio
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Old 29th May 2012, 08:47 AM   #7701
AndrewT is offline AndrewT  Scotland
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Quote:
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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, 09:02 PM   #7702
Salas is offline Salas  Greece
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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 30th May 2012, 11:06 PM   #7703
ra7 is offline ra7  United States
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Salas, do you have any ideas for a balanced phono stage?
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Old 30th May 2012, 11:21 PM   #7704
Salas is offline Salas  Greece
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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, 08:48 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, 10:46 AM   #7706
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For interstage can be good, for RIAA NO. I use FT-3.
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Old 4th June 2012, 03:09 PM   #7707
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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, 03:20 PM   #7708
Salas is offline Salas  Greece
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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, 04:14 PM   #7709
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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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Add BIG subjective anecdotal IMHO non scientific caution sign of course.
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Old 4th June 2012, 06:17 PM   #7710
Salas is offline Salas  Greece
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You doubled the reg's CCS current to hot-rod you mean?
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