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Old 29th October 2010, 03:38 PM   #5141
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Hi Lee

RIAA spreadsheet link "kabusa"

http://www.kabusa.com/riaa.htm

Enjoy

Cheers
Felipe

Quote:
Originally Posted by Thomo View Post
I've just tweaked the resistors on my original board to the values shown in the pdf file hosted earlier in the thread. I also have a shuntreg built on veroboard which has been untested for a couple of years, so hopefully I can have a listen later today.

Ricardo, are you still following this thread?

Lee.
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Old 29th October 2010, 03:44 PM   #5142
Salas is offline Salas  Greece
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Quote:
Originally Posted by Joshua_G View Post
1. Which version will have lower noise and better sound, your 60-63dB version, or your 36-46dB version + your pre-pre?
2. Wouldn't your pre-pre benefit from your Shunt Reg.?
3. Is there a benefit in adding capacitance multiplier after a Shunt Reg.?
1. Best will be the pre pre + the recommended 45dB, bar the K170V 1R Rs double Jfet that the Swiss Franz guy once did. Don't mix individual targeted tweaks for Idss and cartridges I prepared for members with the meaning of version. The last general recommended ones are in the update/evolution link in post #1. Will copy the pre pre there too I guess.
2. You can feed it 9V with a dropping/cleaning RC filter from the general B+ coming from the shunt reg as a pre reg if integrated in same box/pcb, skipping 7809. Dropping R value/wattage will be determined of what main B+ is used and pre pre's 14mA draw.
3. In the very first stage for LMC yes. There will be 10-20nVrtHz at least from even best regs. Even if you make the shunt with ROHM or Hitachi super low noise TO-92s in its gain loop error amp. Its very good for noise but we need further local filtering to ensure we exploit the input fets spec for 0.2mV-0.25mV PITA carts. Lovely tone wimps non the less.
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Old 29th October 2010, 03:46 PM   #5143
Salas is offline Salas  Greece
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Quote:
Originally Posted by merlin el mago View Post
Hi Lee

RIAA spreadsheet link "kabusa"

http://www.kabusa.com/riaa.htm

Enjoy

Cheers
Felipe
Don't recommend arbitrary calculator. The values are integrated in each circuit. There will be errors else.
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Old 29th October 2010, 03:58 PM   #5144
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Quote:
Originally Posted by Salas View Post
Don't recommend arbitrary calculator. The values are integrated in each circuit. There will be errors else.
Ooooops sorry
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Old 29th October 2010, 04:06 PM   #5145
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Thanks, Salas.
How about having 3 2SK170 in parallel on the pre-pre?
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Old 29th October 2010, 04:34 PM   #5146
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Default Schematics & psgr pdf

Links for schematics:

63db-Version 10,5mA IDSS Post 2795 output cart 0.25mV
Simplistic NJFET RIAA

60db-Version 8,2mA IDSS max. Post 3138 ouput cart 0.4mV
Simplistic NJFET RIAA

60db-Version 11.0mA IDSS for DL103 R Post 3767 ouput cart 0.25mV
Simplistic NJFET RIAA

60db-Version 8,5-8,7mA IDSS Post 3069 output cart 0.25mV
Simplistic NJFET RIAA

56db-Version 8,0-9,0mA IDSS Post 1814 output cart 0.25mV-0.5mV
Simplistic NJFET RIAA

55db-Version 6,6mA IDSS for Lyra Dorian Post 4141 output cart 0.6mV
Simplistic NJFET RIAA

52db-Version for 0,5mV MCs Post 236
Simplistic NJFET RIAA

48db-Version 8,0-9,0mA IDSS Post 1813 output cart 0.8-1mV
Simplistic NJFET RIAA

46db-Version for Benz ACE Post 240 output cart 0.8mV
Simplistic NJFET RIAA

43db-Version 4,0mA IDSS Post 4600 MM output cart 4mV
Simplistic NJFET RIAA

41db-Version 8,0-9,0 mA IDSS Post 1812 output cart 2-5mV
Simplistic NJFET RIAA

38db-Version 4,0 mA IDSS Post 5118 MM output 4mV
Simplistic NJFET RIAA

36db-version 7,0-8,0 mA IDSS Post 417 MM 3.5mV
Simplistic NJFET RIAA

pgsr pdf Links for schematics:

63db-Version 10,5mA IDSS Post 2795 output cart 0.25mV
Simplistic NJFET RIAA

60db-Version 8,2mA IDSS max. Post 3138 ouput cart 0.4mV
Simplistic NJFET RIAA

60db-Version 11.0mA IDSS for DL103 R Post 3767 ouput cart 0.25mV
Simplistic NJFET RIAA

60db-Version 8,5-8,7mA IDSS Post 3069 output cart 0.25mV
Simplistic NJFET RIAA

57dB-Version 8-8,5mA IDSS Post 4945 output cart??? MC
Simplistic NJFET RIAA

56db-Version 8,0-9,0mA IDSS Post 1814 output cart 0.25mV-0.5mV
Simplistic NJFET RIAA

55db-Version 6,6mA IDSS for Lyra Dorian Post 4141 output cart 0.6mV
Simplistic NJFET RIAA

52db-Version for 0,5mV MCs Post 236
Simplistic NJFET RIAA

48db-Version 8,0-9,0mA IDSS Post 1813 output cart 0.8-1mV
Simplistic NJFET RIAA

46db-Version for Benz ACE Post 240 output cart 0.8mV
Simplistic NJFET RIAA

45db-Version 8,0-8,5mA IDSS Post 4945 output cart??? high MC-MM
Simplistic NJFET RIAA


43db-Version 4,0mA IDSS Post 4600 MM output cart 4mV
Simplistic NJFET RIAA

41db-Version 8,0-9,0 mA IDSS Post 1812 output cart 2-5mV
Simplistic NJFET RIAA

38db-Version 4,0 mA IDSS Post 5118 MM output 4mV
Simplistic NJFET RIAA

36db-version 7,0-8,0 mA IDSS Post 417 MM 3.5mV
Simplistic NJFET RIAA

20db-Version 7mA IDSS Post 4945 Low MC pre-pre output cart 0.25mV
Simplistic NJFET RIAA


20db-Version 8.5 or 7.5-9mV IDSS Post 3695 Low MC pre-pre output cart 0.4mV 9V battery powered
Simplistic NJFET RIAA


psgr pdf Post 2706 (thanks to Ikoflexer) can be downloaded here: http://www.cs.toronto.edu/~relu/audi...Package-V1.zip

Cheers

Felipe
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Old 29th October 2010, 04:36 PM   #5147
Salas is offline Salas  Greece
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Quote:
Originally Posted by Joshua_G View Post
Thanks, Salas.
How about having 3 2SK170 in parallel on the pre-pre?
Too much gain in the pre pre's case. There are no degeneration resistors. If OTOH you make them GR to keep the transcoductance at bay, you lack on noise again. In general to realize less than what 2 devices like that can do in a simple practical build, really exploiting 4-8, the measures around them are becoming heroic. Then even the simple multiplier ain't enough.
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Old 29th October 2010, 05:01 PM   #5148
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Hi Salas ,

you mean the 44db-Version from Franz Gysi on Post 3887 ?
There are 2 other Versions or Iterations with 60db on Post
3831 + 3742 !
Can you please confirm the right version together with your Pre-Pre ?

Thanx in advance !

Jürgen
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Old 29th October 2010, 05:10 PM   #5149
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He he, you will not find it, because Franz took description guide and subbed his finally higher IDSS K170V than he initially had thought.

The 45dB is the HiMC/LowMM one recommended in the evolution/update link from post #1.
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Old 29th October 2010, 05:17 PM   #5150
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Quote:
Originally Posted by Salas View Post
Too much gain in the pre pre's case. There are no degeneration resistors. If OTOH you make them GR to keep the transcoductance at bay, you lack on noise again. In general to realize less than what 2 devices like that can do in a simple practical build, really exploiting 4-8, the measures around them are becoming heroic. Then even the simple multiplier ain't enough.
Sorry, I don't understand. Can you please rephrase it?
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