Discussion about the Korg PolySix synthesizer

Also,  most of the switching diodes I have seen say 4148 or 914 on them
Zener numbers are 4733 or similar.  Pretty different.

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On Thu, 2/11/16, Bob Grieb bobgrieb@yahoo.com [PolySix] <PolySix@yahoogroups.com> wrote:

 Subject: Re: [PolySix] Re: The Post I wanted to make....
 To: PolySix@yahoogroups.com
 Date: Thursday, February 11, 2016, 8:43 AM
 
 Zener diodes are made to
 break down with reverse voltage
 If you put a
 ten k resistor in series and then apply six volts with a
 power supply in the reverse direction, it should be easy to
 tell what is a 4148 and what is a zener
 
 Assuming the zener voltage is five or less
 
 
 --------------------------------------------
 On Wed, 2/10/16, jw_dewdney@yahoo.com
 [PolySix] <PolySix@yahoogroups.com>
 wrote:
 
  Subject: Re:
 [PolySix] Re: The Post I wanted to make....
 
 To: PolySix@yahoogroups.com
  Date: Wednesday, February 10, 2016, 10:47
 PM
  
  well it's great
 that
  you mentioned that - I THINK I spotted
 a ZENER instead of a
  1N4148 at D3....
 though it's a bit hard to tell them
 
 apart... Perhaps a ZENER got into my signal diode drawer
  somehow (understandable!) .. although it
 didnt' make
  much of a difference in the
 end result... so i'm just
  circuit
 tracing around now - one WEIRD thing i noticed is
  that the ground plane of the top of the board
 is not
  connected to the ground plane of the
 bottom (apparently by
  design?) - odd... on
 the other side of the board it's
 
 connected to CN10's +5V pin....