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 Forum index » DIY Hardware and Software » Thomas Henry designs
Thomas Henry XR VCO
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crashlander42



Joined: Oct 21, 2006
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PostPosted: Fri Feb 02, 2007 9:03 pm    Post subject: Thomas Henry XR VCO
Subject description: A couple of stupid questions.
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I'm working on my XR VCO and noticed that orientation of the electrolytic caps isn't marked on the parts placement diagram. I'm sure I'm missing something stupid. I also noticed the .22uf cap (CCool isn't on the parts placement. I'm sure the solution is obvious. Those solutions are the ones I'm most likely to miss. Smile
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Scott Stites
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PostPosted: Fri Feb 02, 2007 10:13 pm    Post subject: Reply with quote  Mark this post and the followings unread

Not stupid questions at all.

I've attached a JPG showing where the positive leads of C11 and C12 go.

C8, I believe, is attached directly between J3 and R35 (the linear FM input attenuator).

Have you checked out the BugBrand layout?

Cheers,
Scott


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Scott Stites
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PostPosted: Fri Feb 02, 2007 10:24 pm    Post subject: Reply with quote  Mark this post and the followings unread

Oh, yes, C9 and C10 also!


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crashlander42



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PostPosted: Fri Feb 02, 2007 10:37 pm    Post subject: cap orientation Reply with quote  Mark this post and the followings unread

Thanks for your help!

Any idea about c13? Smile Just that one one and I'll leave you alone.

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Scott Stites
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PostPosted: Fri Feb 02, 2007 10:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

AS Homer Simpson is wont to exclaim: "Doh".

Pictured below.

Cheers,
Scott


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chonald



Joined: May 17, 2006
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PostPosted: Sun Feb 04, 2007 10:56 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'm having this same problem, but with the Bug Brand pcb layout.

Would anyone know about the orientations of the caps in that one?

Also, doesn't the Bug Brand pcb have an extra cap to turn it to a low speed? Where is this, and how is it connect?

Cole
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bugbrand



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PostPosted: Mon Feb 05, 2007 1:53 am    Post subject: Reply with quote  Mark this post and the followings unread

Hiya Cole

Aye, I should have marked it on the pdf.. no time right now I'm afraid, but you can print the pdf and pretty easily figure which way around any polarized caps go. C7x is the cap for lfo - experiment.. something like 4u7 - maybe try a non-polarised cap. Experiment.!.

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Fernando



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PostPosted: Wed Feb 07, 2007 5:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

hi all, is there a pcb available from somewhere? (or amybe a spare from any of you?)
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stahlblau



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PostPosted: Mon Oct 22, 2012 10:47 am    Post subject: Reply with quote  Mark this post and the followings unread

Scott Stites wrote:
Not stupid questions at all.

I've attached a JPG showing where the positive leads of C11 and C12 go.

C8, I believe, is attached directly between J3 and R35 (the linear FM input attenuator).

Have you checked out the BugBrand layout?

Cheers,
Scott


Hi,

i'm just building the xr vco and have the same questions. Unfortunately the attachment isn't available anymore. Can someone help me please?

I wonder where to put c8, r7... Question

Many thanks
André
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