Discussion about the Korg PolySix synthesizer

Hi Stef!

>i have two questions: First, should it be a problem to use 74HC08/7408
>instead of the original 74LS08? I´ve figured out strange problems with
>using them (specially with IC31).

The HC-Parts have CMOS logic levels...
If you use HCT-parts that have TTL levels you should have luck...

Ciao
Peter

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Kapsch TrafficCom AG Vienna / Austria
http://www.kapsch-trafficcom.com/
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Hi Ullrich,

the 7408 isn´t the problem. If i remove the 5114 RAM and use the 764HC08
Series, then the Polysix works without Patch-Key-LED flicker. If i don´t
remove the RAM and turn the Variable Resistor right-located on the Power
Supply, then the Buttons will also stop to flicker, but only unless i
don´t turn any Knobs. If i turn a Knob or press six Keys on the
Keyboard, then the Keys will start to flicker again and i hear some
distorted sound on my Speakers (somewhat like a bad connected audio
cable).

The newest problem is that my Octave and Wavefom-Switches doesn´t work
any longer,the Poly produces only PW-Sound at 4". The blue Cable and
their connectors on the Knob-Board and the KLM-367 are ok. I had the
same problem a while ago, but it only happened when the RAM was removed,
now it happens when the RAM is removed -and- when it is inserted. I
strongly believe that the RAM is now definitively defect, so i have to
order a replacement part and try it again.

Thanks!

Stef







Ullrich Peter <peter.ullrich@kapsch.net> schrieb am 26.01.2004,
13:04:41:

> Hi Stef!
>
> >i have two questions: First, should it be a problem to use 74HC08/7408
> >instead of the original 74LS08? I´ve figured out strange problems with
> >using them (specially with IC31).
>
> The HC-Parts have CMOS logic levels...
> If you use HCT-parts that have TTL levels you should have luck...
>
> Ciao
> Peter
>
> \|/
> (o o)
> --oOOO--(_)--OOOo------------------------------------------------------
> Ing. Peter Ullrich
> Hardware & Software Developer / Electronic Musician
> Kapsch TrafficCom AG Vienna / Austria
> http://www.kapsch-trafficcom.com/
> -----------------------------------------------------
> *Tel: +43 (0)50 811 2265
> * Fax: +43 (0)-50 811 2209
> *EFax: +43 (0)50 811 992265
> .oooO *Email: mailto:peter.ullrich@kapsch.net
> ( ) Oooo. ----------------------------------------------------
> \ ( ( ) Private Homepage: http://www.ullrich.at.tt
> -----\_)----) /--------------------------------------------------------
> (_/
>
> This e-mail and any attachment and the included information are confidential,
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