ETI/Powertran/Elrad vocoder

[Magnus Danielson]

From: Hallvard Tangeraas <hall at oslo.online.no>
Subject: Re: ETI/Powertran/Elrad vocoder
Date: Tue, 20 Jun 2000 11:35:05 +0200

> At 04:21 +0200  19-06-2000, Magnus Danielson wrote:
> 
> >> The input amp that you had working -is it a completely remade PCB?
> >
> >Nope, just did some rewiring.
> 
> Good, then there's still some hope for me ;-)

Yes. ;)

> >> Yup, a lot of patience is also needed ;-)
> >
> >Yeah, don't forget to buy a big bag of patience at your next round at
> >the supermarket. Have another lollipop while you are at it.
> 
> I don't think my supermarkewt sells patience-bags that big, but then
> again I might have another go at that lollipop ;-)

Oh, so they don't carry the big bags in Norway? Hmmm.... a few
lollipops usually compensates well thought.

> To tell you the truth, I'll be glad when I can finally connect all the
> modules of the vocoder together, apply power, wait for a few seconds
> and see no smoke, try it out and have it work!!!

Ah. I did it the other way around, namely connect everything up and
then start killing of bugs.

> >> But first I just want to make it work "out of the box" before I ruin it
> >> with modifications ;-)
> >
> >Love to hear more about those.
> 
> We'll get to it ;-)

OK. Now you have promissed ;)

> >> For the PCB I've colour coded some of the connection points
>   [....]
> >> Then you could mail me the edited image. I don't think the list will be
> >> too happy to receive attachements.
> >
> >No, they usually are not happy, but passing URLs is another game ;)
> 
> Yup. I also run a mailing list myself (see my signature), and I've
> actually made it impossible to add attachements (i.e. very large
> messages).

Well, it is really up to the preference of the maintainer and also the
list members.

> >> Perhaps we should even take this discussion off the list
> 
> >Well, unless someone screems I think we can keep it up. I for one find
> >it interesting to read about other peoples debug sessions, there are
> >things to pick up. We don't contribute to many emails anyway.
> 
> Sometimes though, there are quite a lot of messages here. I wish there
> was a digest so I could receive one collective message each day instead
> of many small ones. Do you know of any such thing?

No, I don't think there is one. Maybe it should be considerd.

> >Please check the updated version at:
> >
> >http://home.swipnet.se/cfmd/synths/schematics/eti_amp.html
> >
> >I hope that the added picture helps to remove some questions.
> 
> Thanks! I've taken a look at it briefly, and I can certainly see why I
> have had problems. I never understood that the RV1 potmeter should have
> one of the side-pins connected to where there wasn't even a hole on the
> PCB!
> No wonder it never worked.

Right!

I understood that you got confused and ended up with a dysfunctional board.

> I'm currently looking into the jack connectors, to make sure I figure
> that out correctly and am drawing an illustration for that, so when I'm
> done I can upload some more pictures which you can "approve" compared
> to your circuit.

OK.

> >I also learned the hard way that I need to spend some more time with
> >GIMP.
> 
> Ah, a Linux user?

Bingo! Since many, many years.

> That's pretty cool, to see someone not worship bill gate$ ;-)

;^)

I get my Doze at work.

> I'm an Atari ST and Apple Mac user myself, so no windoze
> in sight here ;-))

Well, these things happend.

> I'll get back to the circuit in a little while, and after that we can
> try to cooperate until we both complete our vocoder -do you have a lot
> of work left? What's not done at your end?

I have to get the second input board into shape, then trim up the
whole thing and possibly have to track down any other fault.

Cheers,
Magnus