MOTM

That's what I was missing.  Thanks Dave.

Dave

djbrow54 wrote:
> 
> 
> The only path to ground is through U1A. For this switch to be on, the
> control must be high and hence the gate must be low. If the gate is
> low, the 555 is reset, so Q is low and U1C and U1D are off. The gate
> low also disables U1B. There is no source, just sink, and trigger
> won't do anything since the 555 is reset.
> 
> Dave
> 
> --- In motm@yahoogroups.com <mailto:motm%40yahoogroups.com>, David
> Moylan <dave@...> wrote:
>>
>> I'm looking over the schematic of the MOTM-800 and wonder if a
>> problematic situation could arise if:
>>
>> 1. Something is jacked into gate defeating the false gate of R15,
>> but itself not providing a gate, which would leave the release leg
> of
>> the 4066 on.
>>
>> 2. Attack and Release set to 0.
>>
>> 3. A trigger pulse occurs
>>
>> It seems as though this would set up a fairly low resistance path
> from
>> 15 volts to ground through the attack and release legs of the 4066.
> Is
>> this not so? Or is the voltage at C9 and Th provided by the divider
>> made up of the 2 legs enough to then turn off the attack leg via the
> 555?
>>
>> Dave Moylan
>>
> 
>