IN-13 Spectrum analyzer
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Dan Foster
Sep 19, 2012, 5:02:25 PM9/19/12
to neoni...@googlegroups.com
Hello everyone,
I am thinking of selling a IN-13 spectrum analyzer, either fully assembled or in kit form. I've just ordered the preliminary boards to get the final prototype together, but it would be 7 bands with a 3.5mm jack input. 12v input from wall power, and possibly a mini USB port. The final product would be around 3.5 inches long and 1.3 inches tall, with the tubes going up from the front. Below is a render of the enclosure to give you an idea of how it might look. I'm still deciding on whether or not to leave the sides open. Let me know what you guys think and if there is enough of a market I will produce some.
Thanks!
Dan
I am thinking of selling a IN-13 spectrum analyzer, either fully assembled or in kit form. I've just ordered the preliminary boards to get the final prototype together, but it would be 7 bands with a 3.5mm jack input. 12v input from wall power, and possibly a mini USB port. The final product would be around 3.5 inches long and 1.3 inches tall, with the tubes going up from the front. Below is a render of the enclosure to give you an idea of how it might look. I'm still deciding on whether or not to leave the sides open. Let me know what you guys think and if there is enough of a market I will produce some.
Thanks!
Dan
Adam Jacobs
Sep 19, 2012, 5:28:52 PM9/19/12
to neoni...@googlegroups.com
Pretty neat. As an audiophile toy, I
suspect that it would sell well. Something to put on top of that
all-tube amplifier.
-Adam
-Adam
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Nicholas Stock
Sep 19, 2012, 5:31:56 PM9/19/12
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Ascending and descending orange glow tubes, why wouldn't it sell! I'd probably tinker with one...;-) Why only 7 channels? May I ask what frequency ranges you decided to sample?
Nick
Adam Jacobs
Sep 19, 2012, 5:34:46 PM9/19/12
to neoni...@googlegroups.com
It would be cool to make one with more
channels for analyzing the quality of your amateur radio
transmissions.. Something to think about for another day. :) My
Swan 500c puts spurious emissions all over the place. I probably
don't want to know what they look like. :S
-Adam
-Adam
Michel
Sep 19, 2012, 5:37:15 PM9/19/12
to neonixie-l
Nice idea! Have you see this 20 tube model already?
http://www.youtube.com/watch?feature=endscreen&v=NqsuAlrJUOc&NR=1
Michel
On Sep 20, 7:34 am, Adam Jacobs <a...@jacobs.us> wrote:
> It would be cool to make one with more channels for analyzing the
> quality of your amateur radio transmissions.. Something to think about
> for another day. :) My Swan 500c puts spurious emissions all over the
> place. I probably don't want to know what they look like. :S
>
> -Adam
>
> On 9/19/2012 2:31 PM, Nicholas Stock wrote:
>
>
>
>
>
>
>
> > Ascending and descending orange glow tubes, why wouldn't it sell! I'd
> > probably tinker with one...;-) Why only 7 channels? May I ask what
> > frequency ranges you decided to sample?
>
> > Nick
>
> >> <mailto:neonixie-l+...@googlegroups.com>.
> > <mailto:neonixie-l%2Bunsu...@googlegroups.com>.
> > For more options, visithttps://groups.google.com/groups/opt_out.
http://www.youtube.com/watch?feature=endscreen&v=NqsuAlrJUOc&NR=1
Michel
On Sep 20, 7:34 am, Adam Jacobs <a...@jacobs.us> wrote:
> It would be cool to make one with more channels for analyzing the
> quality of your amateur radio transmissions.. Something to think about
> for another day. :) My Swan 500c puts spurious emissions all over the
> place. I probably don't want to know what they look like. :S
>
> -Adam
>
> On 9/19/2012 2:31 PM, Nicholas Stock wrote:
>
>
>
>
>
>
>
> > Ascending and descending orange glow tubes, why wouldn't it sell! I'd
> > probably tinker with one...;-) Why only 7 channels? May I ask what
> > frequency ranges you decided to sample?
>
> > Nick
>
> > On Wed, Sep 19, 2012 at 2:28 PM, Adam Jacobs <a...@jacobs.us
> > <mailto:a...@jacobs.us>> wrote:
>
> > Pretty neat. As an audiophile toy, I suspect that it would sell
> > well. Something to put on top of that all-tube amplifier.
>
> > -Adam
>
> > On 9/19/2012 2:02 PM, Dan Foster wrote:
> >> Hello everyone,
> >> I am thinking of selling a IN-13 spectrum analyzer, either fully
> >> assembled or in kit form. I've just ordered the preliminary
> >> boards to get the final prototype together, but it would be 7
> >> bands with a 3.5mm jack input. 12v input from wall power, and
> >> possibly a mini USB port. The final product would be around 3.5
> >> inches long and 1.3 inches tall, with the tubes going up from the
> >> front. Below is a render of the enclosure to give you an idea of
> >> how it might look. I'm still deciding on whether or not to leave
> >> the sides open. Let me know what you guys think and if there is
> >> enough of a market I will produce some.
> >> Thanks!
> >> Dan
>
> >> <https://lh5.googleusercontent.com/-maek3WcQrc4/UFoyqi5UDMI/AAAAAAAAVP...>
> > <mailto:a...@jacobs.us>> wrote:
>
> > Pretty neat. As an audiophile toy, I suspect that it would sell
> > well. Something to put on top of that all-tube amplifier.
>
> > -Adam
>
> > On 9/19/2012 2:02 PM, Dan Foster wrote:
> >> Hello everyone,
> >> I am thinking of selling a IN-13 spectrum analyzer, either fully
> >> assembled or in kit form. I've just ordered the preliminary
> >> boards to get the final prototype together, but it would be 7
> >> bands with a 3.5mm jack input. 12v input from wall power, and
> >> possibly a mini USB port. The final product would be around 3.5
> >> inches long and 1.3 inches tall, with the tubes going up from the
> >> front. Below is a render of the enclosure to give you an idea of
> >> how it might look. I'm still deciding on whether or not to leave
> >> the sides open. Let me know what you guys think and if there is
> >> enough of a market I will produce some.
> >> Thanks!
> >> Dan
>
>
> >> --
> >> You received this message because you are subscribed to the
> >> Google Groups "neonixie-l" group.
> >> To post to this group, send an email to
> >> neoni...@googlegroups.com <mailto:neoni...@googlegroups.com>.
> >> --
> >> You received this message because you are subscribed to the
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> >> For more options, visithttps://groups.google.com/groups/opt_out.
> >> https://groups.google.com/d/msg/neonixie-l/-/1aMMJWi-q3wJ.
>
> > --
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Dan Foster
Sep 19, 2012, 5:41:19 PM9/19/12
to neoni...@googlegroups.com
As for why 7 channels, I found a little IC that breaks down audio into DC components (7 to be exact). I have found a fft that runs on AVR microcontrollers but am not sure of its accuracy or how quick it is. So for now I'm using the IC. I will definitely investigate the fft when I can.
Nicholas Stock
Sep 19, 2012, 5:45:53 PM9/19/12
to neoni...@googlegroups.com
Awesome...now that is some Audiophool bling! I want one!
Dan Foster
Sep 19, 2012, 5:46:38 PM9/19/12
to neoni...@googlegroups.com
Yes, I've seen a lot of neat ones on YouTube. All of them are rather large, though. My board is 3.2 x 1.25 if I remember correctly. So hopefully that's an advantage.
Adam Jacobs
Sep 19, 2012, 5:46:48 PM9/19/12
to neoni...@googlegroups.com
Mind sharing the component part number?
Dan Foster
Sep 19, 2012, 6:02:53 PM9/19/12
to neoni...@googlegroups.com
I'm assuming you're talking about the analyzer? The spectrum analyzer chip is MSGEQ7, which comes in DIP-8 and SOIC-8. You can find it on sparkfun in the DIP package, but the SOIC version is harder to find. I'll dig up the place where you can get it if you want.
Michel
Sep 20, 2012, 1:00:09 AM9/20/12
to neonixie-l
Talking about tube amps, I got a Lafayette LA-214A tube amplifier from
someone about 20 years ago. It's got EL-84 power tubes, 1 for each
channel if I remember well (class-A). I did restore it a bit, the
sound is great and I really like the design as well.
http://xiac.com/Images/Lafayette_LA-214A.JPG
Michel
On Sep 20, 7:28 am, Adam Jacobs <a...@jacobs.us> wrote:
> Pretty neat. As an audiophile toy, I suspect that it would sell well.
> Something to put on top of that all-tube amplifier.
>
> -Adam
>
> On 9/19/2012 2:02 PM, Dan Foster wrote:
>
>
>
>
>
>
>
> > Hello everyone,
> > I am thinking of selling a IN-13 spectrum analyzer, either fully
> > assembled or in kit form. I've just ordered the preliminary boards to
> > get the final prototype together, but it would be 7 bands with a 3.5mm
> > jack input. 12v input from wall power, and possibly a mini USB port.
> > The final product would be around 3.5 inches long and 1.3 inches tall,
> > with the tubes going up from the front. Below is a render of the
> > enclosure to give you an idea of how it might look. I'm still deciding
> > on whether or not to leave the sides open. Let me know what you guys
> > think and if there is enough of a market I will produce some.
> > Thanks!
> > Dan
>
> > <https://lh5.googleusercontent.com/-maek3WcQrc4/UFoyqi5UDMI/AAAAAAAAVP...>
someone about 20 years ago. It's got EL-84 power tubes, 1 for each
channel if I remember well (class-A). I did restore it a bit, the
sound is great and I really like the design as well.
http://xiac.com/Images/Lafayette_LA-214A.JPG
Michel
On Sep 20, 7:28 am, Adam Jacobs <a...@jacobs.us> wrote:
> Pretty neat. As an audiophile toy, I suspect that it would sell well.
> Something to put on top of that all-tube amplifier.
>
> -Adam
>
> On 9/19/2012 2:02 PM, Dan Foster wrote:
>
>
>
>
>
>
>
> > Hello everyone,
> > I am thinking of selling a IN-13 spectrum analyzer, either fully
> > assembled or in kit form. I've just ordered the preliminary boards to
> > get the final prototype together, but it would be 7 bands with a 3.5mm
> > jack input. 12v input from wall power, and possibly a mini USB port.
> > The final product would be around 3.5 inches long and 1.3 inches tall,
> > with the tubes going up from the front. Below is a render of the
> > enclosure to give you an idea of how it might look. I'm still deciding
> > on whether or not to leave the sides open. Let me know what you guys
> > think and if there is enough of a market I will produce some.
> > Thanks!
> > Dan
>
kay486
Sep 22, 2012, 1:23:01 PM9/22/12
to neoni...@googlegroups.com
I would be really interesdted in this! Do you have any indication on final price? Will you sell it assembled or as a kit? Also, would you make only 7 tube version, because id love to see bigger one with 14 tubes or so.
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