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Old 27th July 2010, 07:03 PM   #4191
Salas is offline Salas  Greece
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No, its wrong. Don't Eagle anything more till I give you your final circuits.
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Old 27th July 2010, 07:21 PM   #4192
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OK. It was good practice to get back up to speed with Eagle again so it wasn't wasted work.
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Old 27th July 2010, 10:39 PM   #4193
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Salas, Thanks for your offer. Here is the Idss of the pairs Ihave choosen

Q1 = 0.0102mA
Q2 = 0.0088mA
Q3 = 0.0100mA
Q5 = 0.0065mA

The cartridge is a Denon DL-103R.

I look forward to your suggestions for design.
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Old 28th July 2010, 01:31 AM   #4194
Salas is offline Salas  Greece
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Impossible. Do we talk in Ampere maybe? I need 4 pairs in between 7-10mA.
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Old 28th July 2010, 01:59 AM   #4195
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Correct, the proper unit is Amps.

I have a pair for each Q1, Q2, Q3, and Q5 at those currents listed above. From the pdf, I thought that Q1 and Q3 should be the highest Idss, Q2 should be between 8-9mA and Q5 should be low somewhere in the neighborhood of 5-6mA.
If Q5 needs to be > than 7mA I have several pairs that match up 7.3, 7.4, 7.6, 7.7mA.

so to type correctly with proper units.
Q1 = 10.2mA matched pair
Q2 = 8.8mA matched pair
Q3 = 10.0 mA matched pair
Q5 = 6.5mA matched pair with options to go higher if needed.
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Old 28th July 2010, 02:08 AM   #4196
Salas is offline Salas  Greece
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OK, tomorrow you will have your double jfet cascoded headamp phono with staggered idss pairs and b1 style ac coupled buffer cct with max gain possible to wake up your 103R, plus a properly wired remote sense V1.0 reg with adjustable Norton Vref, not Zener.
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Old 28th July 2010, 12:49 PM   #4197
Salas is offline Salas  Greece
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Quote:
Originally Posted by SGregory View Post
Salas, Thanks for your offer. Here is the Idss of the pairs Ihave choosen

....

The cartridge is a Denon DL-103R.

I look forward to your suggestions for design.
Here you are, good luck, and let us know.
Attached Images
File Type: gif SGregory.gif (8.1 KB, 234 views)
File Type: gif SGregoryReg.gif (8.6 KB, 233 views)
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Old 28th July 2010, 01:17 PM   #4198
massimo is offline massimo  Italy
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So the new "B1 style" buffer has become official?
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Old 28th July 2010, 01:23 PM   #4199
NPower is offline NPower  Portugal
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Hello Salas
What is the main difference between previous RIAA filter and this one ?
Previous
R3-43K
R4-6.8K
C3-16nF
This one
R3-47K
R4//R12-6.8K+1M
C3-15nF

Brgds
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Old 28th July 2010, 01:26 PM   #4200
Salas is offline Salas  Greece
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Quote:
Originally Posted by massimo View Post
So the new "B1 style" buffer has become official?
Maybe, it plays OK and I had spares to put there. SGregory has spares and needs gain. I used it in my LMC so not to lose a few mVRMS too, since it has almost infinite load. I haven't done an exactly same build with and without so to tell. Since its load is a two legged made device it can be exchanged with a resistor and evaluate in a build.
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