Are the trannies situated like the silk screen on the pcb or reversed? They
should be reversed.
should be reversed.
On Tuesday, October 9, 2012, ch1nard wrote:
> **
>
>
> Okay, i have been staring at this for almost a week without making any
> progress so its time to start asking around for help on figuring out what
> might be wrong with my DUSG build
>
> I am running this off +/-15v power supply and i have all the connections
> appear to be correct with no magic smoke escaping
>
> What is happening is that the output lights are lit up constantly.
> When i hook it up to a scope it appears that both halves are cycling
> (triangle) at about only 300mV p/p
> -fiddling with the rise/fall gives minor variations but is still a
> triangle. (never hits saw or ramp)
> -feeding LFO into VC in shows the same minor variances as fiddling with
> the rise/fall knobs. bipolar control seems to work
> -feeding a signal IN combines the signal with this triangle oscillation
> -trig and end do nothing
>
> now everything 'appears' to be wired up correctly and there were a couple
> of lifted pads that i was able to jumper patch around.
> building this as part of a 'best of cgs' BOG panel, so the wiring is well
> documented.
>
> I have verified +/- voltage being delivered to all the TL072's and
> verified + voltage for the LM3900's
> ground appears to be delivered as well.
> all the trans are correct value and orientation (2N3904 and 2N3906) where
> applicable
>
> Anyways, eyes are too tired to look at this anymore tonight...
> time to smoke a bowl and watch some doctor who.
>
>
>
--
________________
rico loverde
415.596.6255
ricoloverde.com
[Non-text portions of this message have been removed]