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Question about measuring volts??
Posted:
Fri Sep 23, 2005 10:27 amby Nisso27
Hey all im on the testing part of my first A12 and i measure j1 pin 4 to pin 3 and i measure 25.30 volts and -26.30 volts on pin 4 to pin 5 .So that seems to be to high and to low from the +/- 14v so what did i do wrong ??
Posted:
Sun Sep 25, 2005 6:07 pmby Nisso27
anyone?? im stuck here no idea what to do ive read other posts and all seems to be fine jsut getting these messed up measurements
Posted:
Mon Sep 26, 2005 3:27 amby tele_player
Are you measuring the voltages at U1 (you wrote J1) ?
Assuming your answer is YES, I'd verify:
- that you've turned R25 and R29 fully counter-clockwise
- that the regulators haven't been swapped. They look the same, but they're different.
Posted:
Mon Sep 26, 2005 8:00 amby Nisso27
yes U1 i mean
Posted:
Mon Sep 26, 2005 8:17 amby Nisso27
bahhh im dumb i was turning them clockwise
but now i turn them counter clockwise and im setr at pin 4-3 16.19 V and 4-5 -16.20 v are those within spec for the sca op-amp??
Posted:
Mon Sep 26, 2005 9:20 amby tpryan
The SC25 will work from +/-15V up to +/-24V. I usually set them up for +/-18V, which gives a maximum peak-peak output of 60V.
Posted:
Mon Sep 26, 2005 9:26 amby Nisso27
Great i have mine set exactly to +/- 18V
now to do this final test and ill have 1 done weeeee