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Subject: Installing the JP8-MK

From: "Verschut, Ricardo" <Ricardo.Verschut@...
Date: 1999-11-12

-----Original Message-----
From: Tom Moravansky [mailto:tmoravan@...]
Sent: Friday, November 12, 1999 12:47 PM
To: G.S.J.Howell@...
Cc: analogue@...
Subject: Re: [AH] Installing the JP8-MK

> Hi all.
> At long last, the Encore Electronics jp8mk Jupiter 8 midi retrofit is
> making its way towards me. :o)
> I'm slightly daunted by the prospect of installing it myself. Whilst I
> solder my own audio and midi leads, and I've fixed up a few MMT8's,
> including installing new EPROMs, the thought of drilling through the
> case is a bit intimidating, especially when you consider what a great
> synth the now fairly rare JP8 is.

A couple tips from someone that's installed one.

1) buy a hole punch. It is the best $25 you can spend.
Many companies make them and they have the exact size
needed for a MIDI jack. The way it works is that you
drill a small hole in the case, fasten the two parts of the
punch through the hole and then tighten the punch. It makes
a perfect hole through the metal.

2) Since you still have to drill a hole, make sure to minimize the
spread of metal shavings. I do this by putting heavy duct tape
on the inside of the case over the hole and then put a second
layer loosely over the same area, forming a sticky 'bag' where I
will drill. After drilling, use the tape to pick up any spare
bits left there.

3) Take your time soldering the wires, make sure you have the correct
pins and wires.

4) The version I had required you to solder wires to the legs of
various ICs. If you're not comfortable doing that, take an old
chip and practice.

5) The MIDI board installs in place of the EPROMs on the CPU board.
If your JP-8 has those chips socketed, it's pretty easy to do.
Otherwise you have to unsolder the original EPROMs and fit sockets
there (or solder the MIDI board directly in place).

6) Take your time. Plan to spend 1 whole day. It may only take
1 to 2 hours, but leave plenty of time and do not rush.


Tom Moravansky tmoravan@...