moley1390
Member
Hi, I was wondering how to measure the DC across a signal cap, in order to determine if it can be removed - is it as simple as connecting a multimeter (set to, say, 200m DC) and touching the terminals of the cap?
In the following schematic, using the above method, the DC across C8 is 34mV and across C7 is 2.5mV - could either of these be removed? The cap values are C8=10uF/50V and C7=47uF/25V. Also, with the +ve multimeter lead touching the +ve cap leg, both of those voltages were reading negative - is that normal?
I'm planning to upgrade the opamps to, say, OPA2134 or 2228, would this change the DC across them significantly? Current opamps are JRC 4558 (yuck).
Thanks in advance for any help!
In the following schematic, using the above method, the DC across C8 is 34mV and across C7 is 2.5mV - could either of these be removed? The cap values are C8=10uF/50V and C7=47uF/25V. Also, with the +ve multimeter lead touching the +ve cap leg, both of those voltages were reading negative - is that normal?
I'm planning to upgrade the opamps to, say, OPA2134 or 2228, would this change the DC across them significantly? Current opamps are JRC 4558 (yuck).
Thanks in advance for any help!