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Old 28th November 2012, 08:39 PM   #1271
orelli is offline orelli  Italy
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With the Ohm's law (V=IR) , Vp-p will be 0.016x680=10.88V, Vp=5.44V and Vrms will be
5.44x0.707=3.84V. I'm right?
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Old 29th November 2012, 10:38 AM   #1272
EUVL is offline EUVL  Europe
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My understanding is that full range current should be 4mA.
But those people who own 9018's or 9012's can tell you better.


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Old 29th November 2012, 05:29 PM   #1273
orelli is offline orelli  Italy
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The BII service manual says " 16mA peak to peak at each output". 16mA peak to peak are 8mA peak, and 8x0.707=5.6mArms.

5.6mA = 0.0056 A, for the Ohm 's Law, 0.0056A x 680R = 3.8 VRMS.

I never seen 4mA.
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Old 29th November 2012, 06:26 PM   #1274
rolls is offline rolls  Switzerland
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Quote:
Originally Posted by orelli View Post
The BII service manual says " 16mA peak to peak at each output". 16mA peak to peak are 8mA peak, and 8x0.707=5.6mArms.

5.6mA = 0.0056 A, for the Ohm 's Law, 0.0056A x 680R = 3.8 VRMS.

I never seen 4mA.
Both are correct. 4mApkpk/Dac output, and there are 4 parallel dacs in stereo mod.
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Old 5th January 2013, 02:47 AM   #1275
EUVL is offline EUVL  Europe
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Someone at some fishy forum was looking for a Spice model of the SEN IV.
Of course we have; this one for SEN V18 together with a simulated ES9018 output.

This is meant for you to play around with.
The FFT is not accurate, so don't quote THD figures from this.
For that we have other methods / models.




Patrick
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File Type: asc ES9018_SEN_V18.asc (2.7 KB, 96 views)
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Old 5th January 2013, 04:10 PM   #1276
Bemused is offline Bemused  United Kingdom
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Many fishy thanks Patrick, pleased your still looking after me.
Pleased it works with LTSpice as its the only one I can use although only in a novice manor but it will help with my diy enjoyment and maybe teach me something also.

Loving SEN by the way and surprised more or not using it with there Buffalos.

Taking your advice and moving to differential inputs on power amps in the near future.
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Old 5th January 2013, 06:54 PM   #1277
EUVL is offline EUVL  Europe
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That's a pity........

I have a much improved version of the XCEN on my lab table waiting to be finished.
Should solve all the thermal drift problems and lower noise floor further.
But seems not required anymore.




Say Happy New Year for me to the fishy gang,
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Old 7th January 2013, 12:17 PM   #1278
Bemused is offline Bemused  United Kingdom
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Good news about XCEN Patrick but bad news for me as it means choices.
I am better with no choices :-)
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Old 7th January 2013, 12:49 PM   #1279
EUVL is offline EUVL  Europe
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You can always (choose to) have both.




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Old 26th January 2013, 05:29 AM   #1280
EUVL is offline EUVL  Europe
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There were some discussions elsewhere about using the SEN circuit for very high current output DACs.
Examples include using multiple ES9018s in parallel.

For such application, it is perhaps worth considering that the circuit bias be at leat 4~8 times that of the total DAC output.
You can always using many many 2SK369Vs in parallel, e.g. 8x to get to 200mA bias.
But if you are looking at such bias current, you might also consider the LU1014 triode cell as used in the DAO.

The DAO SE all-FET Class-A ZGF Headphone Amplifier

I have not tried this myself, so just an idea.


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