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voltage
Posted:
Thu Nov 10, 2005 8:55 amby Nu-tra
I'vebuilt five A12'S so far and they have all been about +-18v on both the negative and positive pin 3 and 5... Before twaeking the amount to +-16v Now this last one I made was at +-20 on pin 3 and 5 before tweaking.. On your instruction manuals it says I shouldbe getting +-14v
I looked over the last 4 pres i built and everthing looks ok... Any suggestions?
V
Posted:
Thu Nov 10, 2005 9:14 amby tele_player
Double check the values of the voltage-setting resistors: R29,R30,R31 and R25,R26,R27, and make sure D5 and D7 are oriented correctly.
Posted:
Thu Nov 10, 2005 9:15 amby tpryan
Are you saying you can't adjust the voltage below +/-20V? Did you follow step 31?
Posted:
Thu Nov 10, 2005 7:33 pmby Nu-tra
No I can adjust it.. Is it too high from the get go is all... Yourinstructions say I should see +-14 I've been seeing +-18-20 is this ok?
Posted:
Thu Nov 10, 2005 8:10 pmby tele_player
When you adjust it, what's the lowest voltage reading you can get?
Posted:
Fri Nov 11, 2005 1:08 amby Nu-tra
about 14
Posted:
Fri Nov 11, 2005 2:26 amby tele_player
That means you didn't do step 31 in the instructions (turn R25 and R29 full counter-clockwise), which sets the voltages as low as possible.
In other words, there's nothing wrong.
Posted:
Fri Nov 11, 2005 11:00 pmby Nu-tra
Thanks! I totally misunderstood the step... I thought I was supposed to see the lowest when I first powered it up.
Have a great weekend...