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FS output stage for B3SE(ES9018) with Lundahl LL1684 and Vishay S102C Foil resistors
FS output stage for B3SE(ES9018) with Lundahl LL1684 and Vishay S102C Foil resistors
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Old 1st May 2018, 12:24 PM   #1
schultzsch is offline schultzsch  Europe
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Join Date: Mar 2009
Default FS output stage for B3SE(ES9018) with Lundahl LL1684 and Vishay S102C Foil resistors

Hello,

I am selling my B3SE dac output stage.

The stage includes 4x Vishay S102C 336r00 0.01% precision resistors as I/V resistors. It has also a 22nf cap placed in parallel with the resistors acting as a low pass filter. On the output of the transformer I have also the zobel as per lundahl datasheet
The actual configuration looks like this(missing the output zobel from the schematic

Click the image to open in full size.

Please note that in this configuration only 2 of the 336r resistors are used(the other 2 are soldered on the board but not used).

I have started with something inspired by Joe Rasmussen and after did the above mood. Here you can see a schematic of Joe`s idea(you have all resistors on the board for this schematic, it only needs to change the connections of the resistors) :

Click the image to open in full size.


And now some photos with the boards and the transformers :

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.


I have managed to do also some thd test at 20hz, 300hz and 1khz. The rms output voltage was 200mv in all the cases and the transformers were connected to the B3SE dac that was generating the signal.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Please note the the B3SE dac mounts above the the output board.
For any other info please send me a message.

I would like to get SOLD for everything without shipping and paypal fees.

Last edited by schultzsch; 30th June 2018 at 04:09 PM.
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Old 1st May 2018, 10:21 PM   #2
passive420 is offline passive420  United Kingdom
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Old 2nd May 2018, 05:58 AM   #3
schultzsch is offline schultzsch  Europe
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Please try to right click and open them in a new tab.
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Old 9th May 2018, 11:19 AM   #4
schultzsch is offline schultzsch  Europe
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Old 15th May 2018, 05:14 AM   #5
schultzsch is offline schultzsch  Europe
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180€ shipped to europe
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Old 22nd May 2018, 11:18 AM   #6
schultzsch is offline schultzsch  Europe
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Old 2nd June 2018, 09:10 AM   #7
schultzsch is offline schultzsch  Europe
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Old 8th June 2018, 01:39 PM   #8
schultzsch is offline schultzsch  Europe
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Old 8th June 2018, 02:01 PM   #9
dady is offline dady  Croatia
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Old 8th June 2018, 03:20 PM   #10
schultzsch is offline schultzsch  Europe
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