Fw: [sdiy] ETI vocoder input amps

[Hallvard Tangeraas]

At 14:19 +0000  09.11.01, Astbury Paul wrote:


>Sorry to break in on this thread, but how did you get hold of the ETI \
>Powertran Vocoder PCB(s)? I assume you must have made them from the PCB
>images in the ETI October '80 article?

Actually I spent a LOT of time and hard work trying to track down the
complete article until I finally succeeded!
I ordered photocopies of the article from the publishers of ETI once I
saw a listing over past articles, but the main board PCB layout was
missing (apparently too big for the magazine), and it had to be ordered
from PowerTran as far as I remember (the company behind the design of
the vocoder who also sold a kit of it).

But PowerTran had long since closed down and nobody knew where to get
hold of the guy who wrote the article.
Then I discovered the Internet (I believe this was back in 1993/94) and
someone replied to me (Jurgen Haible? can't quite remember who it was
right now) saying that he had seen the same article in the German
magazine "Elrad".
I got their address, contacted them, and a week later I had the
complete article including the main PCB layout!

>From then on I found people on the net who lived locally having access
to equipment for making PCBs, so I got all the PCBs made and here I am,
with all boards assembled except those %#&"* input amps which is the
only thing holding me back to complete it!!!

Anyway, getting back to your request...
I have all the pages of the article here, both the Elrad and ETI
articles (the same vocoder) and all the PCB layouts, but there's a file
somewhere on the net which has all of this ready for downloading. Not
sure how good the quality of the scans are, but as far as I remember it
should be decent.
Try searching the web for "ETI vocoder" or something and I'm sure
you'll find it.

Failing that I could probably scan and upload everything I have, but
I'd rather wait till I figure out the input amps so I can document this
properly first, not having everybody else messing around with it as
long as I have.


Hallvard
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