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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Bob Cordell's VinylTrak
Bob Cordell's VinylTrak
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Old 2nd July 2018, 02:41 PM   #101
Adams_Leo is offline Adams_Leo  China
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Quote:
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Finally....

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Very nice JOB!!!!

Leo
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Old 2nd July 2018, 03:04 PM   #102
Edmond Stuart is offline Edmond Stuart  Netherlands
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Chapeau !!!
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Old 11th July 2018, 07:41 PM   #103
Black Jack is offline Black Jack  Ukraine
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Some measurements

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(SRP-MC my version of Bob Cordell`s VinylTrak)

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To be cont.

Last edited by Black Jack; 11th July 2018 at 08:00 PM.
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Old 11th July 2018, 08:21 PM   #104
Bob Cordell is offline Bob Cordell  United States
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Quote:
Originally Posted by Black Jack View Post
Some measurements

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(SRP-MC my version of Bob Cordell`s VinylTrak)

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To be cont.
Looks good!

Cheers,
Bob
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Old 11th July 2018, 09:25 PM   #105
Black Jack is offline Black Jack  Ukraine
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It is interesting that in the right channel there is a delta 0.35 dB with the left channel.
Probably because some mismatch in DC-Servo components values.
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Old 11th July 2018, 09:29 PM   #106
Bob Cordell is offline Bob Cordell  United States
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Quote:
Originally Posted by Black Jack View Post
It is interesting that in the right channel there is a delta 0.35 dB with the left channel.
Probably because some mismatch in DC-Servo components values.
Yes, I noticed that. The delta begins to exceed 0.1 dB at 30 Hz. You are probably right about it being the DC servo.

Cheers,
Bob
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Old 18th October 2018, 04:19 PM   #107
Dontsov is offline Dontsov  Russian Federation
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I have a question regarding Wilson current mirror. Do I have to match Q10 and Q11 (Q29 and Q30 as well) for better performance?
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