Seventh Circle Audio

by **Nisso27** » Fri Sep 23, 2005 10:27 am

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 ??

by **Nisso27** » Sun Sep 25, 2005 6:07 pm

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

by **tele_player** » Mon Sep 26, 2005 3:27 am

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.

by **Nisso27** » Mon Sep 26, 2005 8:00 am

yes U1 i mean

by **Nisso27** » Mon Sep 26, 2005 8:17 am

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??

by **tpryan** » Mon Sep 26, 2005 9:20 am

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.

by **Nisso27** » Mon Sep 26, 2005 9:26 am

Great i have mine set exactly to +/- 18V

now to do this final test and ill have 1 done weeeee

Seventh Circle Audio

Question about measuring volts??

Question about measuring volts??

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