[Digital_Hell] DX-7 Noise

[Joe Miklojcik]

I too read this article in MIX, and thought the same thing about my TX81Z.  I
went out and obtained service manuals, and it looks like the the D/A is
fairly well cordoned off from the rest of the system.  Sadly, I'm a software
guy, so I can't go any further with this mod.  I just don't know enough.  I'd
really like to hook up with an engineer who could try this, and I'd be more
than happy to risk sacrificing my TX81Z to the cause.  Also, if someone could
help me figure out how to use an eprom burner to up and download the ROM ...
I'm totally willing to share all of my results.

Barry L Klein wrote:

> This may be what is needed, as I tried replacing the opamps in my DX7 with
> 5534 or whatever series parts and the effort was not worth it.   I think a
> better D/A with a less glitchy circuit would work.  Anyone have a junk DX7
> to try this on?  I don't want to accidentally trash mine.
> Barry
>
> ----------
> From:   Aaron Anderson
> Sent:   Tuesday, December 01, 1998 10:43 PM
> To:     David Evans; David Shipman
> Cc:     digitalhell at resrocket.com
> Subject:        Re: [Digital_Hell] DX-7 Noise
>
> At 10:25 PM -0500 12/1/1998, David Evans wrote:
>
> i was reading in Mix a couple weeks ago about some places that do
> reasonably cheap gear mods.. things like add better converters to
> lxp-1/5s... perhaps it would be a trivial mod to clean up the dx-7's
> output
> stage..