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<DIV><FONT size=2>I have exactly the same problem. I sell the ModBox add on
for the TR606, and my</FONT></DIV>
<DIV><FONT size=2>pitch sweep circuit is based on the one from The Mix. I
pulled my hair out for 12</FONT></DIV>
<DIV><FONT size=2>hours last night trying to get it to work properly. I
found that reducing the 220ohm</FONT></DIV>
<DIV><FONT size=2>resistor to about 57ohms worked. It is a very finicky and
stupid circuit. I am going</FONT></DIV>
<DIV><FONT size=2>to try and come up with a better design, with a proper
voltage control, so that the</FONT></DIV>
<DIV><FONT size=2>bass drum can be played over a 1 octave range from a
keyboard. Imagine a 303</FONT></DIV>
<DIV><FONT size=2>sequencer playing that!</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>bub</FONT></DIV>
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<DIV style="FONT: 10pt arial"><FONT color=#000000>Ok, heres the deal..
</FONT></DIV>
<DIV style="FONT: 10pt arial"><FONT color=#000000>First off, 220ohms or
LESS to GROUND is NOT KOSHER!! Unless you want to totally fry
something...</FONT></DIV>
<DIV style="FONT: 10pt arial"><FONT color=#000000></FONT>I was alert to
this, and I put in 220k there, knowing that print errors do occur at
times, and no way trusting 220ohms to ground and to still have the unit
survive..</DIV>
<DIV style="FONT: 10pt arial"> </DIV>
<DIV style="FONT: 10pt arial"><FONT color=#000000>Next..</FONT></DIV>
<DIV style="FONT: 10pt arial"><FONT color=#000000>Change the cap from
330uf to 10uf, the 220ohm to 1k, and viola, it works..</FONT></DIV>
<DIV style="FONT: 10pt arial"><FONT color=#000000>Still draws loads of
current (enough to have your leds on your 606 flicker) but much better..
</FONT></DIV>
<DIV style="FONT: 10pt arial"><FONT color=#000000>I would assume that
you could also go to 1uf, and change the 220ohm to 10k, but I dont know
if your rc time constant would be there, but that makes it look as
though there is a 10k ohm to ground, and that might draw quite a bit
less current, which would be good.</FONT></DIV>
<DIV style="FONT: 10pt arial"><FONT color=#000000></FONT> </DIV>
<DIV style="FONT: 10pt arial"><FONT color=#000000>I myself am trying to
get it to drive offa the accent, since the accent is not all that great
anyway, nor is it used much..</FONT></DIV>
<DIV style="FONT: 10pt arial"><FONT color=#000000>Maybe buffer it with
some cmos buffers, and have the option to drive a few more things, like
hihat filter, etc...</FONT></DIV>
<DIV style="FONT: 10pt arial"><FONT color=#000000></FONT> </DIV>
<DIV style="FONT: 10pt arial"><FONT
color=#000000>Rob...</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>