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Old 23rd November 2011, 08:25 AM   #7011
AndrewT is offline AndrewT  Scotland
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Hi Kst,
how much does your 45Vin change during the day/week/year?
5Vdiff in to out needs to be checked for Vdrop on the CCS resistor before committing to that Vdiff.

You could need 50Vdc as nominal input if you really need 40Vdc on the output. Maybe an even higher input, say nominal 55Vdc for a 40Vdc output.
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Old 23rd November 2011, 07:09 PM   #7012
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change?

Maybe I spoke too soon. As per Salas' recommendation on the 1.2R schematic, I'll shoot for minimum 10v difference. Got to see what iron the local surplus shops have.
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Old 23rd November 2011, 10:44 PM   #7013
RCruz is offline RCruz  Switzerland
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What is the current you are using in your v12r ?
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Old 27th November 2011, 10:58 PM   #7014
RCruz is offline RCruz  Switzerland
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Just increased current in my shunts from 200mA to 300mA and the difference is outstanding. Now my 48dB Benz build sounds much wider with greater speed, retaining the "full on" presentation it had before. Dynamics seem better also. Must listen some more before I can be sure.

Now the ccs mosfet produces more heat and the output mosfet is very hot. I did not know the output mosfet would also be hotter.... Must replace the heatsinks for something beeffier
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Old 27th November 2011, 11:01 PM   #7015
Salas is online now Salas  Greece
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At what Volt B+ ?
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Old 27th November 2011, 11:38 PM   #7016
RCruz is offline RCruz  Switzerland
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41Vin for 28Vout as before. I only changed one CCS resistor
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Old 27th November 2011, 11:59 PM   #7017
Salas is online now Salas  Greece
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The voltages are wide enough to heat up significantly for +100mA than before.
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Old 28th November 2011, 07:35 AM   #7018
RCruz is offline RCruz  Switzerland
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Thanks... you have mail Salas.
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Old 29th November 2011, 09:29 PM   #7019
Salas is online now Salas  Greece
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Default ZYX Bloom H

Here is a cartridge not that affordable but not stratospheric either, that I set up and listened on just a Technics 1200 MKII. Gave me a very nice overall impression, good synergy as a whole with the Jfet MC phono. Beyond nice, fundamental tonality is correct I think. Checked on Harbeth SHL5 pair as well.
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Old 29th November 2011, 10:06 PM   #7020
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Here are some clips from the latest incarnation of my deck. I'm using an Audiomods arm and a Dynavector Te Kaitora Rua now. I am still using V1.0 regs but do plan on upgrading to V1.2 when I get round to it (and can get them stable):

Supertramp - Bloody Well Right:
BloodyWellRight-Audiomods-TKR.wav

Adele - Rolling In The Deep:
RollingInTheDeep-Audiomods-TKR.wav

Led Zeppelin - Rock 'n' Roll
RocknRoll-Audiomods-TKR.wav

Lou Reed - Walk On the Wild Side:
WalkOnTheWildSide-Audiomods-TKR.wav
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