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Post by ppa on Apr 6, 2015 11:05:15 GMT -6
 I am glad to present my new board APP4010 that's a unbalancing board that can use a DOA or an IC opamp as unbalancing item. I have designed it using the input section of my I/O board. This board has been designed for trasparent sound. To avoid electrolityc caps on the signal path this board has a DC servo system inside to avoid offset voltage on out. Moreover, it can be configured with a few of options. It can be powered also with dual 24V rails for the opamps that can run with them. The DC servo can powered with a different power supply if needed or with the same power supply that is used for the DOA (as in picture). Moreover, to simplify all if is needed using a lower power supply voltages for the opamp of the servo, there are two zener diodes to lower the main power supply voltages. The DC servo cannot be used if not needed. |
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Post by Deleted on Apr 7, 2015 18:46:44 GMT -6
Looks like a serious building block for a common task with many options.
Where do you see it's best usage? Upgrading input stages of devices?
Or dedicated input stage of an unbalanced mastering chain?
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Post by ppa on Apr 8, 2015 6:14:33 GMT -6
Looks like a serious building block for a common task with many options. Where do you see it's best usage? Upgrading input stages of devices? Or dedicated input stage of an unbalanced mastering chain? I have designed it as general purpose input stage for unbalancing signal for DIY use. If for example is needed changing an input line transformer this board may be used in this case. I use the same circuit in a few of my DIY projects. Yes, it may be used as upgrading for gears too. As best usage, there is not a rule for using it, I think that it could be used for trasparency sound with a trasparent opamp, but if you would like to hear the sound of a dated opamp it might be a way to do. |
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