You can use what you like, but 100K doesn't improve the performance
with long interconnects, where the capacitance of the cable becomes
a factor with respect to the output impedance of the source.
The capacitance of the Jfets is about 30 pF, which gives an input rolloff
frequency of about 300 KHz for the halfway position of a 100K pot.
It's not a real problem either way.
with long interconnects, where the capacitance of the cable becomes
a factor with respect to the output impedance of the source.
The capacitance of the Jfets is about 30 pF, which gives an input rolloff
frequency of about 300 KHz for the halfway position of a 100K pot.
It's not a real problem either way.
I am doing a final rework on the board, as I figured out a clever way to increase
the range of some of the filter settings without more parts.
This will be done maybe today, and I will see prototypes in a week or so. A week
after that I will have checked it, and then orders for parts can proceed.
I don't think it will be available before the end of the month. More like August.
the range of some of the filter settings without more parts.
This will be done maybe today, and I will see prototypes in a week or so. A week
after that I will have checked it, and then orders for parts can proceed.
I don't think it will be available before the end of the month. More like August.
Finished and test boards here in the lab. I am working on the documentation,
and have informed the store of its pending availability.
Most sincere thanks!
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