Yamaha DTXpress/DTXplorer/DTXtreme

> Ed wrote: "OGD, what purpose could the jumper have? Maybe the PCY65S was 
> truncated so that the "three-zones" could be saved for later, meaning 
> the introduction of the XtremeII. The three-zone snare was not an 
> issue because the XtremeII wouldn't have used it. But if Yamaha's 
> upgraded cymbal was merely going to be their usual gum-rubber with an 
> extra FSR-triggered voice, they may have decided to withhold it for 
> the more expensive kit. By now, however, all of that could have 
> changed. Just random thoughts. ultimately to no end."
> 
Ed,

If you notice in the photos for the TP65S there are three Resistors, R1, R2,
R3. Only R1 and R2 exists on the TP65, whick tells me they are used with the
piezo only.

Since the R3 resistor only exists in the TP65S it must be for the Rim
switches. If you had just one common rim switch (like in the PCY65S) then
the second lead present in the stereo cable out could pass that signal
without a need for a resistor.

So I am guessing that the resistor is be used to distinguish the different
between a signal being sent from Rim1 as oppose to from Rim2.

How that could works is like this (guess on my part, if I had to design one,
this is how I would proceed.) Let's say a 12volt signal would indicate that
the Rim1 FSR had triggered, and a say 6 volt signal (in-line resistor
reducing signal from 12 volts to 6 volts) would indicate a Rim2 FSR had
triggered. Simple. 

Since both sides of the FSR ribben in the PCY65S trigger the same sound,
there would be no need for a Resister to determine which of the two sounds
had triggered, and so only a jumper wire would be needed. So that regardless
of which side was struck the same say 12 volts signal would trigger the
common rim FSR switch.

What would be interesting to find out is if you were to buy a resistor that
matches the one in the TP65S and install it in the PCY65S in place of the
jumper and see if the two sides of the rim FSR trigger separate sounds. Then
with little expense and some soldering, the left side of the rim could be
the "Rim1=Bell pad", and the right side of the pad could be "Rim2=edge pad",
leaving the bow as the main cymbal sound.

OGD
 
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