Bottlehead Forum
General Category => Technical topics => Topic started by: feras on December 23, 2019, 11:54:59 AM
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I assembled Eros2. It works fine. I noticed 1 mismatch between the provided schematic (page 7 manual) and provided assembly instructions. In the schematic EF86 point A6/B6 is connected to C4S OB point and resistor 90R9 which goes to 7308's C2/C7.
In the instruction manual a 90R( resistor is connected between A6/B6 and 9/10 or 14/5. From 9/10 and 14/15 is connection to C4S and trough one more 90R9 resistor to C2/C7.
In the schematic option signal goes from EF86 to 7308 though one 90R9, but according to the assembly instructions via 2 resistors.
Which option is correct? I tried both and have no preference for sound.
Thanks
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In the schematic EF86 point A6/B6 is connected to C4S OB point and resistor 90R9 which goes to 7308's C2/C7.
In the instruction manual a 90R( resistor is connected between A6/B6 and 9/10 or 14/5. From 9/10 and 14/15 is connection to C4S and trough one more 90R9 resistor to C2/C7.
The manual does not have the plate stoppers for the EF86 because they are not absolutely necessary. They are certainly not harmful, and since they made the build a bit easier to do, we opted to include them.
Which option is correct? I tried both and have no preference for sound.
It's very unlikely that you'll hear any difference between the configurations. I would leave them in personally, but then again I'm the one who put them there in the first place...
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Thank you for the response.
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Theoretically those resistors add a tiny bit of noise, but I have them in my Eros 2 also.
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Theoretically those resistors add a tiny bit of noise
Or they prevent a tiny bit of oscillation ;)