Cgs synth

There are two possible reasons 1) Are you putting them in backwards?
2) they aren't LM3900, despite whatever is written on them.

>I forgot to mention i'm getting all the correct power to the correct pins

and am not finding any shorts between any of the pins.

>
>--- In cgs_synth@yahoogroups.com, "adematteo" <adematteo@...> wrote:
>>
>> Hey guys, I just put together the SSG and it's not working so i tried to

switch out the lm3900's after giving the board some continuity testing and
looking over the board briefly, i still need to do a lot more
troubleshooting but what i wanted to ask about was this,

>> when i switched the lm3900's out it froze my system up as if there was a

short in the power supply.I did some tests to see but couldn't find a short
anywhere so i put the old ones back in and system powered back on fine so i
switched them out with brand new ones i had and it cooked them within
seconds of powering up.

>>
>> Like i said i still have a bunch of leg work to do to figure out why it's

not working but am confused that some of the lm3900's would create what
appears to be a short and the others seem to have no effect ?

>>
>> Thanks, Tony
>>
>
>
>
>
>------------------------------------
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>Yahoo! Groups Links
>
>
>
>

_______________________________________________________________________
Ken Stone sasami@... otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>