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STEREO.TXT
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Text File
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1992-03-07
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6KB
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134 lines
Name : David Ashcroft
Project : Stereo Sound output for Atari STFM (Without Throughport)
Address : (See Profile)
Date : 2 June 1993
Disclaimer
This project should not damage your ST in any way as long as it is
constructed as directed. However, I will not be held responsible for
any damage you should create while making or using this device. If
when it is plugged in - the screen should become distorted etc, switch
off immediately and recheck the soldering - you may have inadvertently
soldered two parts of the plug together. In all my use of the device I
have never experienced any problems and please do not let this
disclaimer put you off building the project - it will just save my ass in
the case of some silly bugger coming near his ST with a soldering iron!
______________________________________________________________________
The project outlined below is very easy to build and basically gives
the STFM the same sound output as the STE - although in this project
the Stereo is 'Simulated Stereo'. The only sacrifice is that this
project can not be operated at the same time as anything is connected to
the monitor port.
The project costs only a few pounds and does not call for any
modifications to your beloved ST at all. The project is easy enough
for anyone with a VERY basic practical knowledge of soldering to
build.
First of all is a list of parts needed - alongside them are the MAPLIN
ELECTRONICS catalogue numbers and prices so you can obtain the parts
very easily. MAPLIN shops can be found all over the country, but I
have also included the Address and Phone number of the Mail Order
warehouse in case you can't easily get to a shop.
There is one part listed as optional, in reality it is better to buy it
as you will more than likely need it. It enables you to put the ST's
sound output into your average tape recorder etc. So in my opinion
- if you want the best - get the rest!. Oh, and the lead is grey, so
it blends in with your ST Setup!
----------------------------------------------------------------------
- Part - Catalogue Code - quantity - Price -
----------------------------------------------------------------------
- 13-Pin DIN Plug - JW95D - 1 - £1.45 -
- Lapped 4-core Grey - XR92A - 1 - £0.32 -
- Plug Plas 3.5 - HF80B - 2 - £0.60 -
- 2x3.5 Mono/3.5 Ste (optional) - JM91Y - 1 - £0.98 -
----------------------------------------------------------------------
- £3.35 -
---------
You will also need : - Solder and a Soldering Iron and two small
pieces of speaker wire (maximum about 15 cm/6 inches long - I have not
included this is the parts list because it can be bought cheaper at
your local DIY shop etc!)
Unscrew the back of the 13-Pin plug, and you are faced with an array of
tags to solder wires on to - the only tags that you need to be
familiar with are the 4th pin on the top row, pin 1 and the very
bottom pin - pin 13
O O O O 1
O O O O
O O O O
O
13
Solder two of the wires to pin 1 (note the colours - for example I
will use red and blue). Then solder the other two wires to pin 13
(again note the colours).
Rescrew the back of the plug back on.
At the other end of the cable there should now be 4 wires sticking
out.
Open the back of the 3.5mm Mono jacks
Then solder each of the wires that you connected to pin 1 (in my case
red and blue) to the terminal at the top of the Mono jacks (each of
the wires goes to a different socket).
Now solder each of the other two wires (the ones connected to pin 13) to
the other terminals on each of the sockets.
CONGRATULATIONS - YOU NOW HAVE 'SIMULATED STEREO' OUTPUT
To get it working, just plug in the monitor plug to the monitor socket
and then get your amplifier ready (or ZY-FI speakers - from EVESHAM
MICROS). If your amplifier does not accept the "2 Mono Jack input"
then I suggest that you buy the Two 3.5mm Mono Sockets to 3.5mm Stereo
plug - listed as optional in the parts list.
WHAT TO DO IF IT DOESN'T WORK
If you have followed the instructions it should have worked. If
however it does not, check all of the solder connections to make sure
that there is no short circuit or broken wires anywhere. If you have
done all this and there are no mistakes then you should try de-
soldering the wires at the jacks and re-arranging the way that the
wires are connected - try this one jack at a time, de-solder then swap
the two wires about. If it still doesn't work, then why don't you send
ALL of the parts to me and I will have a go at fixing it for you!
However, don't anyone bother trying to send me unassembled kits for
assembly - I don't have the time!
Happy Stereo!
Oh and bye the way - this text file is not in the public domain, it is
for the use of ICTARI members only !
**********************************************************************
MAPLIN MAIL ORDER ADDRESS
P.O. BOX 3
Rayleigh
Essex SS6 8LR Tel:(0702) 554161
(They take credit cards)
**********************************************************************