MOTM

I looked through the archives for the mod to give the 800 full ADSR with
only a gate signal,
but only came across the jumper wire from the Q1 collector method.

There was also mention of using a 5k resistor.

What is the best method?  ie. Synthtech approved.

Which side would the collector of Q1 be?

Thanks,

Mark

> I looked through the archives for the mod to give the 800 full ADSR with
> only a gate signal,
> but only came across the jumper wire from the Q1 collector method.
>
> There was also mention of using a 5k resistor.

That's the one. I just used a jumper, with no problems. Others have stuck a
5K resistor in the line due to paranoia about potential transients or shorts
when plugging / unplugging a trigger input.

I attached my wire not to the Q1 collector but to the top of the board at
the nearest resistor connected directly to the collector (schematics are at
home, so I don't know which resistor). I then cable tied the extra wire to
one of the bundles going to the jack.

> Which side would the collector of Q1 be?

The collector pin can be deciphered from the schematic. The lead that
connects perpendicularly to the vertical line in the transistor symbol is
usually drawn from the left, and is the BASE. The lead that emanates from
the vertical line at an angle with an arrowhead is the EMITTER. The other
lead emanating at an angle without any arrow is the COLLECTOR.

Dave Bradley
Principal Software Engineer
Engineering Animation, Inc.
daveb@...

If you look at the transistor from the front, facing the flat side, the
leads are

Emitter   Base   Collector

left-to-right.

Paul S.

-----Original Message-----
From: Dave Bradley <daveb@...>
To: motm@onelist.com <motm@onelist.com>
Date: Monday, July 19, 1999 1:23 PM
Subject: RE: [motm] MOTM-800 ADSR Mod


>From: "Dave Bradley" <daveb@...>
>
>> I looked through the archives for the mod to give the 800 full ADSR with
>> only a gate signal,
>> but only came across the jumper wire from the Q1 collector method.
>>
>> There was also mention of using a 5k resistor.
>
>That's the one. I just used a jumper, with no problems. Others have stuck a
>5K resistor in the line due to paranoia about potential transients or
shorts

>when plugging / unplugging a trigger input.
>
>I attached my wire not to the Q1 collector but to the top of the board at
>the nearest resistor connected directly to the collector (schematics are at
>home, so I don't know which resistor). I then cable tied the extra wire to
>one of the bundles going to the jack.
>
>> Which side would the collector of Q1 be?
>
>The collector pin can be deciphered from the schematic. The lead that
>connects perpendicularly to the vertical line in the transistor symbol is
>usually drawn from the left, and is the BASE. The lead that emanates from
>the vertical line at an angle with an arrowhead is the EMITTER. The other
>lead emanating at an angle without any arrow is the COLLECTOR.
>
>Dave Bradley
>Principal Software Engineer
>Engineering Animation, Inc.
>daveb@...
>
>
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