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Old 27th December 2019, 09:07 PM   #2241
Peter Daniel is offline Peter Daniel  Canada
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No need to balance any bias currents, just use 1K for R3 and keep everything else the same.
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Old 28th December 2019, 07:55 AM   #2242
M M is offline M M  Sweden
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Quote:
Originally Posted by Peter Daniel View Post
No need to balance any bias currents, just use 1K for R3 and keep everything else the same.
Thanks Peter!

Short follow-up question:
If I were to increase R1, would that require any bias balancing? I was simply looking at this from a standard op amp perspective, perhaps incorrectly.

/M
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Old 28th December 2019, 02:15 PM   #2243
Peter Daniel is offline Peter Daniel  Canada
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No problem changing R1 value, I usually bypass that resistor completely.
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Old 26th January 2020, 10:43 AM   #2244
slungu is offline slungu  Germany
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I got a 3875 standard kit and was wondering if I could use some 1000uF Panasonic caps instead of the provided ones that are 2700uF. I saw in the opening posts that C1/C2 were specified to 4.7uF-100uF and wanted to know what lead to higher capacitance in between back then and today.
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Old 26th January 2020, 05:13 PM   #2245
Peter Daniel is offline Peter Daniel  Canada
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Yes, no problem using 1000uF Panasonic caps.
C1/C1 are not recommended to be used any longer.

The main caps, Panasonic FC 1500/50, are sometimes on backorder, and then I need to substitute them with something else not to further delay order shipment.

Some people tried those 2700uF Chemicons in the past and claimed they sounded better then stock caps.
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