Yamaha CS80

Hi Steve,

I'm keen, i might also need some fader caps and other bits if you have them?


Andrew

> steve kodnel <dzlvs8@...> wrote:
> 
> If anyone wants a voice card from a Yamaha CS-50, I have one for sale. 
>  It works perfect.  I'm  not sure how much to ask for one but I am 
> going to say $300 obo right now.  
> Also, if you need any other parts, please let me know, I may still have 
> them available.Thanks,
> Steve
> 
> 
> --- On Sat, 5/14/11, jkjelec@... <jkjelec@...> wrote:
> 
> From: jkjelec@... <jkjelec@...>
> Subject: Re: [yamahacs80] Pitch Drop When Using Sustain 1
> To: yamahacs80@yahoogroups.com
> Date: Saturday, May 14, 2011, 4:13 PM
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> OK, this is what I found: 
> 
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> 
> I was thinking that it had to be this, that I cut and saved from AH (I 
> think) a few years ago: 
> 
> 
> 
> "Seems the SH card collects debris over the years from being near the 
> front   
> 
> of the machine, underneath the keyboard, and this reduces its 
> effectiveness   
> 
> as an insulator. The impedance of the input to the SH amps (CA3140T) is 
> in   
> 
> the order of 1.5 T Ohms (1500 Meg Ohms!) and the SH caps are quite small 
> for   
> 
> this application (0.22uF) so it doesn't take much to cause that voltage 
> to   
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> leak away. Some good old household dust plus several gigs in smokey   
> 
> theatres (this was the eighties, don't forget) would probably be enough. 
> 
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> I found if I lifted the end of the caps which feed to the CA3140T's from 
> the   
> 
> PCB, Pin 3 of the CA3140T's and also the 4066 Gate outputs and 
> wire-linked   
> 
> them together away from the surface of the PCB, the problem goes away. 
> There   
> 
> is still a very small voltage drop but even with full Sustain 
> (Yamaha-speak   
> 
> for Release) the change in pitch isn't noticeable. 
> 
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> I'm guessing this must be a common fault, as the CS-60 card I have 
> exhibits   
> 
> the same problem. 
> 
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> 
> Lucid." 
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> 
> jkjelec 
> 
> 
> 
> ----- Original Message ----- 
> 
> From: "lucidsound" <lucidsound@...> 
> 
> To: yamahacs80@yahoogroups.com 
> 
> Sent: Thursday, May 12, 2011 2:33:54 PM 
> 
> Subject: [yamahacs80] Pitch Drop When Using Sustain 1 
> 
> 
> 
> Has anyone else come across the quirk whereby if using long release 
> times in Sustain Mode 1, the oscillator pitch drops slowly when the 
> notes are released?  Switching to Sustain II brings the notes back to 
> the correct pitch. 
> 
> 
> 
> I figure this is something to do with the Keyboard SH card, and voltages 
> leaking away from the capacitors. 
> 
> 
> 
> Any suggestions or previous experiences of this problem welcome! 
> 
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> 
> Thanks, 
> 
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> 
> Lucid. 
> 
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> Yahoo! Groups Links 
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