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I Built a Wersi Organ
My Wersi Organs
by Joe
Sayers
Joe
gives us an interesting view of his own experiences of building the Wersi Cosmos
from kit form.
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1) I Suppose it
all started whilst Mary and I were on holiday in September 1981.
Monday morning, it was raining cats and dogs, we decided to go and look
at a back street D.I.Y. shop who were agents for a firm that supplied
organ kits. We were made most welcome and permitted to play any of
the assembled organs in stock. |
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2) On our return
home we found that the supplier had sent a newsletter with the address
of their nearest stockist. It was then decided that a trip to
Birmingham would be made. We returned home with a car full of
boxes containing all the bits and pieces to build a Wersi Cosmos Organ,
plus twelve instruction manuals (some in German) and a bank balance some
£1550 lighter. |
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3) The following
day I unpacked box No.1 and read the first two manuals. One being
general instructions which told you what various electronic parts looked
like. The other related to description and construction of the
first printed circuit board.
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4) After some
three hours work I had finished the first board - the main power supply
for the organ. The manual carefully explained how to connect the
P.C.B. via a transformer to the mains. It carried on to say if
there is no smoke or 5th November fireworks display continue with the
test procedure (three voltage tests). There were no sparks or
smoke so with my brand new multi-meter I went ahead with the tests.
Success - it worked first time. |
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5) The second
P.C.B. was much more complicated, in fact each successive one seemed to
get more complicated with hundreds of bits and pieces. I should
say that most P.C.B.s are tested immediately on completion and of course
it would be too much to expect everything to work first time.
However, help was always available at the other end of the telephone
from the suppliers engineers who were most helpful. |
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6) One
morning at 07.30 the wooden cabinet arrived ready for me to assemble all
the P.C.B.s, Keyboards, Rhythm Unit, Pedals etc., so after some ten
weeks of work soldering thousands of resistors, diodes, capacitors,
transistors and integrated circuits (some of which had as many as 40
pins) on the P.C.B.s. I was ready for the big 'switch-on'. |
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7) The initial
'switch-on' procedure was quite lengthy. The P.C.B.s were to be
connected with several wiring harness. Some wires are soldered to
various Boards others are connected by plugs on to pins which I had
soldered on the Boards. I started according to the instructions
manual, connecting some plugs leaving other un-connected. The
manual said 'switch-on' for a few seconds, watch out for smoke'!
Would it work? Would it burn up? |
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8) With my son standing by
with the fire extinguisher and my wife suddenly deciding she had some urgent
shopping to do, I pressed the switch. Great - no smoke. We then
proceeded according to instructions. Test this, adjust that etc. It
took about four hours. I played a tune. The organ worked as it
should. We collapsed exhausted.
The Wersi Cosmos Organ cost me,
with some tools, multi-meter and soldering iron about £1600 including the stool.
To buy the organ ready assembled would have cost me about £4100. Building
the organ myself has given me the knowledge of how it works. It has also
given me a great sense of achievement.
December 1982
Since building the Cosmos Organ I
have added some extras, the total cost being about £2100. I had no real
problems.
Joe Sayers
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