So... who can help me with the mechanical mounting and hole punching???
Do your cards have an 1731 opamp ? Recently, there's been some threads about the stability of cloned 1731-opamps, but now it looks like the original situation isn't stable either. But... AML-27 card with a small resistor gives the more gain, right ? Very strange you get stablity problems at higher gains, unless the layout is not good.Finally had a chance to play with my AML-27 cards.
I recaped them with BC radials. I built a shunt gain switch using the am-27 values (see.. http://img.photobucket.com/albums/v357/plushmore/QE712/am_27.jpg ) I fired them up with a +-15 volt supply. My early
tests reveal that the they are unstable with gain resistors smaller than 330R..they start to osc somewhere around 300Khz. Therefore mine don't seem to like gains above 55db. At lower gains they seem clean and flat from 15Hz to 30Khz on my scope up to 27 volts out where they start to clip. WOW 30+db!! Wish I had a distortion analyzer. Has any one else
had a chance to play with theirs? Would like to know your findings!
Enter your email address to join: