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John Curl's Blowtorch preamplifier part II
John Curl's Blowtorch preamplifier part II
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Old 10th April 2012, 06:23 PM   #22141
PMA is offline PMA  Europe
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John Curl's Blowtorch preamplifier part II
IMO it is high time for the CIRCUIT again, some might have forgotten and some might have never known
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Old 10th April 2012, 06:27 PM   #22142
gk7 is offline gk7
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Quote:
Originally Posted by elektroj View Post
...
It's a SONY !
That gain module is from their top of the line crossovers TA-D88 and TA-D900.
...
At least the the TA-D900 is from 1981 (not from the 70)
(I have the service manual here).
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Old 10th April 2012, 06:58 PM   #22143
Joshua_G is offline Joshua_G  Israel
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Quote:
Originally Posted by PMA View Post
IMO it is high time for the CIRCUIT again, some might have forgotten and some might have never known
This circuit looks to me blameless. Possibly as good as it can get for a SS based line stage.
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Old 10th April 2012, 07:23 PM   #22144
wayne is offline wayne  United States
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John Curl's Blowtorch preamplifier part II
John you kicked butt on page 48 of the new Absolute sound for best preamps ever.(May/June)
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Old 10th April 2012, 07:46 PM   #22145
john curl is offline john curl  United States
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Thanks Wayne, I have not seen that issue, or even the April issue of TAS. I hope they still send me the magazine. It is almost impossible to get it any other way.
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Old 10th April 2012, 07:55 PM   #22146
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John Curl's Blowtorch preamplifier part II
Quote:
Originally Posted by Joshua_G View Post
This circuit looks to me blameless. Possibly as good as it can get for a SS based line stage.
After several years, I have some new sims of this circuit, and it proves to be perfect.
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Old 10th April 2012, 08:18 PM   #22147
elektroj is offline elektroj  Europe
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Quote:
Originally Posted by gk7 View Post
At least the the TA-D900 is from 1981 (not from the 70) (I have the service manual here).
gk7,
According to the vintageknob TA-D900 is just repackaged TA-D88.
Can you check your service manual and tell me if the gain blocks in D900 look the same as this one?
http://www.diyaudio.com/forums/analo...ml#post2977922

Thanks,
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Old 10th April 2012, 08:41 PM   #22148
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Yes, they seem to be the same.
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Old 10th April 2012, 08:53 PM   #22149
Steve Eddy is offline Steve Eddy  United States
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Quote:
Originally Posted by gk7 View Post
Yes, they seem to be the same.
IN PUT. OUT PUT.

se
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Old 10th April 2012, 08:55 PM   #22150
simon7000 is offline simon7000  United States
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John,

You have a rival here! Someone actually built one of Pavel's ideas!

MOSFETs + OpAmp. Pavel Macura's designed amplifier.
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