A couple more things. You don’t need an oscilloscope for the D/A
adjustment. It’s just a lot of finicky turns of VR6 and VR7 and watching the
Program LEDs. For the MG and PWM, you can probably just set their ranges to your
own personal preferences without an oscilloscope. If it sounds good to you and
you are the only one playing it, why not? For PW VR3 adjustment, the objective
is to get the pulse width down to zero when the knob is at 10. As you turn up
the PW knob, the pulse will get thinner and thinner until the note you are
playing is no longer audible. This is used in some patches to “turn off” the
oscillators so only the filter resonance and sub-oscillator can be heard.
Don B.
Sent: Wednesday, April 24, 2019 8:09 AM
Subject: Re: [PolySix] Re: PolySix only works in test
mode?
The D/A Adjustment is the most critical to getting all knob ranges correct.
If the thing boots up properly every time, then the Reset circuit adjustment is
probably okay. The filter tracking is all done on the KLM-366 and you need to
get the KLM-367 calibrated first.
They only list 4 items for KLM-367 check and adjustment:
(1) Reset circuit
(2) D/A adjustment
(3) MG adjustment
(4) PW/PWM check and adjustment
I should mention two important things. Correct +/-5V and +/-15V supplies
need to be set first. If you tweak these later, you may have to recalibrate
everything else. That picture of the “Normal setting” is important. Make sure
all knobs and switches are set just like the picture before attempting the D/A
adjustment or anywhere else in the service manual where they tell you to start
with the normal setting.
Don B.
Sent: Wednesday, April 24, 2019 1:09 AM
Subject: Re: [PolySix] Re: PolySix only works in test
mode?
Thank you! Yes, i'm really glad that it's working this well right off the
bat. I don't own an oscilloscope so it might be a while until I can calibrate it
if I do it on my own. How crucial is it to calibrate the polysix?
The
only things i've noticed are the attack, decay, and release knobs only really
responding in the VCA when turned about halfway up, which could be normal
behavior for all I know. There's still a good range from 5-10, and the filter
still seems responsive at levels below 5. The only other issue besides that is
that the resonances on the filters aren't perfectly tuned when using key
tracking. Nothing too
major.