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 Forum index » DIY Hardware and Software » Thomas Henry designs
The Thomas Henry "Clangora"
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State Machine
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PostPosted: Tue Dec 19, 2006 8:11 am    Post subject: Reply with quote  Mark this post and the followings unread

A chip that may be harder to get is the NE570 compander IC using in the Clangora . It is available at Small Bear:

http://www.smallbearelec.com/Detail.bok?no=235

Mouser carries it but in an SOIC and will require an adapter:

http://www.mouser.com/search/refine.aspx?Ntt=NE570

Here is another good supplier of electronic components and HW:

(Debco Electronics)

http://safe.dhwd.com/cgi-bin/debco/index.html

They also carry the CA3080 and LM13700: (just in case you want to use that instead of the NE570 but some modifications will be needed of course)

http://safe.dhwd.com/cgi-bin/debco/search.html

http://safe.dhwd.com/cgi-bin/debco/search.html

Hope these sources help ...

Bill
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Uncle Krunkus
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PostPosted: Tue Dec 19, 2006 8:45 am    Post subject: Reply with quote  Mark this post and the followings unread

Hey Bill,
isn't the NE570 a compander?
The 3080 and the LM13700 are TOAs.

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State Machine
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PostPosted: Tue Dec 19, 2006 10:08 am    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
Hey Bill,
isn't the NE570 a compander?
The 3080 and the LM13700 are TOAs.


Yes, but he is not using it like a compression/expansion unit but in more of a straight VCA role. The basis of companding is the use of voltage controlled amplifiers and the close monitoring of signal levels. There are two independent sections in the NE570. With some modification of the original Clangora circuit, I would imagine that the LM13700 could be made to do the same thing as the NE570 since the OTA is the basis of most VCA's. The LM13700 is more widely available and cheaper and it has a better S/N ratio than a CA3080. Also, the Iabc control current is better isolated on the LM13700 part than on a CA3080 as I have mentioned before in other topics on the forum.

I have not looked back on the article lately in it's entirety but I believe Tom's reasoning was that two VCA sections could be made from one NE570 and that the distortion and noise specification is better using this part. So, you can make two VCA sections with one LM13700 also if you could not get a NE570.

Bill
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PostPosted: Tue Dec 19, 2006 3:00 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for explaining that Bill.
I can see I still have much to learn. Smile
I've learned so much hanging out here, I forget sometimes that my theoretical background is a bit shaky! Embarassed

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State Machine
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PostPosted: Tue Dec 19, 2006 6:43 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
Thanks for explaining that Bill.
I can see I still have much to learn. Smile
I've learned so much hanging out here, I forget sometimes that my theoretical background is a bit shaky! Embarassed


I am happy to help always and I personally have learned from all of you. I feel like I know you all Very Happy
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Photon



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PostPosted: Fri Oct 19, 2007 1:31 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'm now building the Clangora module and I prepared this parts placement graphic to aid in assembly. I thought I'd post it here in case anyone needs a copy. Its been a really big help.

Its basically the two images from the original article superimposed over each other with the components clearly outlined. I have a higher res. version if anyone needs.

I'll be posting more clangora updates as I make progress. stay tuned...


peter


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PostPosted: Fri Oct 19, 2007 3:29 pm    Post subject: Reply with quote  Mark this post and the followings unread

does anyone have a clean looking, 1:1 copy of the PCB art? I've got the one from here, but its not sized so well. I'm in the process right now of re-doing one, but if one already exists why not just use that...
-justin
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State Machine
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PostPosted: Fri Oct 19, 2007 3:38 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
Its basically the two images from the original article superimposed over each other with the components clearly outlined. I have a higher res. version if anyone needs.

I'll be posting more clangora updates as I make progress. stay tuned...


Nicely done. I love this circuit. It really can make some "way out there" sounds !! Here is a picture of my breadboard. No PCB ... Shocked

Bill


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Photon



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PostPosted: Fri Oct 19, 2007 4:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

goodrevdoc wrote:
does anyone have a clean looking, 1:1 copy of the PCB art? I've got the one from here, but its not sized so well. I'm in the process right now of re-doing one, but if one already exists why not just use that...
-justin


hey Justin

Reduce it to 64% on a photocopier and you'll be all set. I had to figure this out by trial and error. I'm weird the guy at the copier holding a 16 pin IC socket to each copy and muttering to himself.

P.
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PostPosted: Fri Oct 19, 2007 4:17 pm    Post subject: Reply with quote  Mark this post and the followings unread

Bill
*very nice job*. Those little socketed modules are very cool. I've seen those before in various prototyped things at work but never worked that way myself.

I'm psyched to get this done. I etched the panel earlier today on my lunch break. I've got the PCB mostly populated so I'll post a photo this weekend.

Peter
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State Machine
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PostPosted: Fri Oct 19, 2007 5:27 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
I'm psyched to get this done. I etched the panel earlier today on my lunch break. I've got the PCB mostly populated so I'll post a photo this weekend.


Yes, I am really interested to see the result Cool

Thanks for sharing the project. Very Happy
Bill
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Etaoin



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PostPosted: Fri Oct 19, 2007 11:25 pm    Post subject: Reply with quote  Mark this post and the followings unread

Funny how I seem to have completely missed this thread while I have been working on PCB's in this thread: http://electro-music.com/forum/topic-19835.html.

I etched the boards straight from the GIF I had (after figuring out the right scaling). Didn't run into any problems:


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Last edited by Etaoin on Fri Oct 19, 2007 11:29 pm; edited 1 time in total
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PostPosted: Fri Oct 19, 2007 11:27 pm    Post subject: Reply with quote  Mark this post and the followings unread

No sound samples from mine though. I already sold it on (including, sadly, three of my four LM566's...)
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PostPosted: Sat Oct 20, 2007 4:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

nice job, Etaoin.
I'm surprised you sold it. Were you disappointed with it?

Mine won't be finished as soon as I had predicted. I somehow forgot to order one of the parts. Somehow I always forget something Crying or Very sad . Must be pathological...
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PostPosted: Sat Oct 20, 2007 10:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
I somehow forgot to order one of the parts. Somehow I always forget something. Must be pathological...


If I always ordered all of the parts I probably would have been out of DIY years ago. Its that project lapse and stock of parts that keeps me building! Also thanks for the scaling advice. I tried that originally with not much success but will give it another go before re-laying out another board.
-justin
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PostPosted: Sun Oct 21, 2007 5:44 am    Post subject: Reply with quote  Mark this post and the followings unread

Something is either back-ordered, I forgot to order it, they neglected to send it, its the wrong part, or the capacitors are HUGE! Shocked

If you continue to have trouble, I have the pcb image at the right size. I may even have it on press n peel. Let me check tomorrow and if I have it I could mail them to you. I'll let you know.

Pete
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PostPosted: Sun Oct 21, 2007 8:43 am    Post subject: Reply with quote  Mark this post and the followings unread

Here's my Frac panel design. I'll post the actual panel soon.

Peter


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PostPosted: Sun Oct 21, 2007 11:03 am    Post subject: Reply with quote  Mark this post and the followings unread

Photon wrote:
nice job, Etaoin.
I'm surprised you sold it. Were you disappointed with it?


I never finished it. Needed the money for something else.

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PostPosted: Sun Oct 21, 2007 12:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
Here's my Frac panel design. I'll post the actual panel soon.


I really like your FRAC layout. Very well done Exclamation

Bill
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PostPosted: Sun Oct 21, 2007 2:56 pm    Post subject: Reply with quote  Mark this post and the followings unread

Yes, I like it too...
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PostPosted: Sun Oct 21, 2007 4:35 pm    Post subject: Reply with quote  Mark this post and the followings unread

Perhaps a little OT, but save a spot next to your Clangora. Thomas wasn't the least bit unoccupied this summer...... Wink
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Photon



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PostPosted: Sun Oct 21, 2007 5:57 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks everyone.

The panel is etched and I'll be drilling holes and trimming it to size tomorrow. I'll try to put a photo up of the actual panel soon.


Scott Stites wrote:
Perhaps a little OT, but save a spot next to your Clangora. Thomas wasn't the least bit unoccupied this summer...... Wink


Shocked I'm almost out of real estate in my cabinet.
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PostPosted: Sun Oct 21, 2007 8:44 pm    Post subject: Reply with quote  Mark this post and the followings unread

Scott Stites wrote:
Perhaps a little OT, but save a spot next to your Clangora. Thomas wasn't the least bit unoccupied this summer...... Wink


Enough of the winks. Let's start a new thread and uncork this puppy for the EM crowd.

To get the ball rolling, its name is: the Mega Percussive Synthesizer.

Modesty prevents me from mentioning it is the most versatile percussion synth ever conceived. Oops, I just did. We better let Scott take this over on another thread.

And now back to your regularly scheduled Clangora...

Thomas Henry

P.S.: no hard-to-find parts!
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PostPosted: Sun Oct 21, 2007 10:22 pm    Post subject: Reply with quote  Mark this post and the followings unread

Oh boy. You're killing me Thomas. Keep em coming.

pete

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PostPosted: Mon Oct 22, 2007 3:53 am    Post subject: Reply with quote  Mark this post and the followings unread

Freakin' hell! Thomas & Scott = whirlwinds!
You know you're drowning us all, right?!
(though I suspect people don't mind!)

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