Re: [neonixie-l] IN-13 tubes

[Mac Doktor]

On Jun 22, 2021, at 6:43 AM, Paul Parry <pa...@bad-dog-designs.co.uk> wrote:

Having a sort through, and came across 35 unused IN-13 Nixies, and 12 that have just had extended wires soldered on, so 47 in total. I used to make Spectrum analysers, and then couldn't get the tubes. These are no use to me now and will just sit in a drawer, so open to offers or even better, swaps for regular Nixies :)

Nice! But I know that if I have to ask I can't afford them. 8/

Terry Bowman, KA4HJH
"The Mac Doctor"

https://www.astarcloseup.com

“...the book said something astonishing, a very big thought. The stars, it said, were suns but very far away. The Sun was a star but close up.”—Carl Sagan, "The Backbone Of Night", Cosmos, 1980

[Nick Andrews]

Well since I am an admitted hoarder of cool shite, I'm interested.  I have some on order already, but more is better, right?  Do you have an idea of what you want for them?  And where are you?  Your email suggests you're in the UK, so shipping cost could be a factor.  I am in San Antonio.  If multiple parties want some, it might be cost effective to ship all of them going to the USA in one package and then relay them out.  I'd be willing to help with that if that is the case.  Thanks!

On Tue, Jun 22, 2021 at 5:43 AM Paul Parry <pa...@bad-dog-designs.co.uk> wrote:

Having a sort through, and came across 35 unused IN-13 Nixies, and 12 that have just had extended wires soldered on, so 47 in total. I used to make Spectrum analysers, and then couldn't get the tubes. These are no use to me now and will just sit in a drawer, so open to offers or even better, swaps for regular Nixies :)

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[Robert]

How many analysers did you end up making?

Rob

On 23 Jun 2021, at 17:15, Nick Andrews <nickja...@gmail.com> wrote:



Well since I am an admitted hoarder of cool shite, I'm interested.  I have some on order already, but more is better, right?  Do you have an idea of what you want for them?  And where are you?  Your email suggests you're in the UK, so shipping cost could be a factor.  I am in San Antonio.  If multiple parties want some, it might be cost effective to ship all of them going to the USA in one package and then relay them out.  I'd be willing to help with that if that is the case.  Thanks!

On Tue, Jun 22, 2021 at 5:43 AM Paul Parry <pa...@bad-dog-designs.co.uk> wrote:

Having a sort through, and came across 35 unused IN-13 Nixies, and 12 that have just had extended wires soldered on, so 47 in total. I used to make Spectrum analysers, and then couldn't get the tubes. These are no use to me now and will just sit in a drawer, so open to offers or even better, swaps for regular Nixies :)

<IMG_20210622_113052.jpg>

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[Paul Parry]

Hi All,

I deleted the post about an hour after creating it, so many people have asked me for the tubes, and I've long since promised them to someone in the group. 

In total I made 14 or 15 Spectrum Analysers, but they were hard work and very fiddly.. quite relieved in the end to have closed the line down!
All made from solid mahogany / walnut / Oak with machined brass, and totally analogue in design. 

Best wishes,

Paul

[Audrey]

Absolutely gorgeous, nice work

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[Alex]

Hi Paul,

Can I ask what electronics you used for these? Was it completely custom or something bought in? I know I have a case of in13 somewhere (and many cases of in9) so should plan something with them and this looks very nice!

Cheers, Alex

[Joe Croft]

That is very pretty!!!

-joe

[Nick Andrews]

Wow, those are really nice!  Not cheap in any way, I'll bet.  Would you mind sharing the circuitry?

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[Robert Norman]

Rob

On 24 Jun 2021, at 16:51, Nick Andrews <nickja...@gmail.com> wrote:



Wow, those are really nice!  Not cheap in any way, I'll bet.  Would you mind sharing the circuitry?

On Thu, Jun 24, 2021 at 2:54 AM Paul Parry <pa...@bad-dog-designs.co.uk> wrote:

Hi All,

I deleted the post about an hour after creating it, so many people have asked me for the tubes, and I've long since promised them to someone in the group. 

In total I made 14 or 15 Spectrum Analysers, but they were hard work and very fiddly.. quite relieved in the end to have closed the line down!
All made from solid mahogany / walnut / Oak with machined brass, and totally analogue in design. 

Best wishes,

Paul

<Oak Array.jpg>

<Array_6.jpg>

<Last_Array.jpg>

On Wednesday, 23 June 2021 at 18:14:33 UTC+1 Robert wrote:

How many analysers did you end up making?

Rob

On 23 Jun 2021, at 17:15, Nick Andrews <nickja...@gmail.com> wrote:



Well since I am an admitted hoarder of cool shite, I'm interested.  I have some on order already, but more is better, right?  Do you have an idea of what you want for them?  And where are you?  Your email suggests you're in the UK, so shipping cost could be a factor.  I am in San Antonio.  If multiple parties want some, it might be cost effective to ship all of them going to the USA in one package and then relay them out.  I'd be willing to help with that if that is the case.  Thanks!

On Tue, Jun 22, 2021 at 5:43 AM Paul Parry <pa...@bad-dog-designs.co.uk> wrote:

Having a sort through, and came across 35 unused IN-13 Nixies, and 12 that have just had extended wires soldered on, so 47 in total. I used to make Spectrum analysers, and then couldn't get the tubes. These are no use to me now and will just sit in a drawer, so open to offers or even better, swaps for regular Nixies :)

<IMG_20210622_113052.jpg>

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[Paul Parry]

Hi Alex,

The electronics were custom designed, and one of the members of this group kindly did the PCB layout / design.  There was an analogue processing board that had 2 channels ( 10 pictured, so 20 channels ) That contained a butterworth filter for selecting the desired frequency band, you can see at the bottom of the board the relevant components are fitted, as they determine the frequency so during test and setup they get fitted. The rest of the circuitry linearizes the signal and then some circuitry to drive the IN-13. 

There is then another board that isolates and amplifies the incoming audio, and provides the 120v dc for the tubes.

Here's a view of the complete set up inside the case: 

They are quite a job to put together, as I only made them in small quantities, the boards were all SMT assembled by hand which took a good 30 hrs to build up a set up, and then each channel had to be individually 'tuned' so you need a calibrated signal generator and a scope, but as it is all analogue you end up with an instantaneous response and the selectivity of the channel is very precise.

Best wishes,

Paul

[Nick Andrews]

Wow, that's some really sweet work there!

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[Alex]

Crikey, that is a bit of work, a very tidy and a neat solution!

I think I would be tempted to do a linearising, buffering and driver stage for each tube that takes in an analogue input from a DAC which then just sweeps across with a DG type multiplex switch IC to each tube driver, that would then let a micro do the audio frequency binning using a FFT but also allow for lots of effects and variations... Yours is nice and elegant though, mine will probably stay as a thought process!

Thanks for sharing!

[Joe Croft]

Very impressive Paul. I especially like the use of analog filters, seems so much more in place with nixie tubes. A lot of pain to set up and keep calibrated, but for the sake of art, it was a good desision!

-joe

On Fri, 2021-06-25 at 01:10 -0700, Paul Parry wrote:

Hi Alex,

The electronics were custom designed, and one of the members of this group kindly did the PCB layout / design.  There was an analogue processing board that had 2 channels ( 10 pictured, so 20 channels ) That contained a butterworth filter for selecting the desired frequency band, you can see at the bottom of the board the relevant components are fitted, as they determine the frequency so during test and setup they get fitted. The rest of the circuitry linearizes the signal and then some circuitry to drive the IN-13. 

There is then another board that isolates and amplifies the incoming audio, and provides the 120v dc for the tubes.

Here's a view of the complete set up inside the case: 

They are quite a job to put together, as I only made them in small quantities, the boards were all SMT assembled by hand which took a good 30 hrs to build up a set up, and then each channel had to be individually 'tuned' so you need a calibrated signal generator and a scope, but as it is all analogue you end up with an instantaneous response and the selectivity of the channel is very precise.

Best wishes,

Paul

On Thursday, 24 June 2021 at 09:31:44 UTC+1 Alex wrote:

Hi Paul,

Can I ask what electronics you used for these? Was it completely custom or something bought in? I know I have a case of in13 somewhere (and many cases of in9) so should plan something with them and this looks very nice!

Cheers, Alex

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[Will Yager]

If anyone wants to build an IN-13 or IN-9 based analyzer, I have all my schematics etc available on GitHub for this project: http://yager.io/vumeter/vu.html

https://github.com/wyager/vumeter/

Software (DSP and tube control) is written in Rust. Schematics in KiCad. 

Will

On Jun 25, 2021, at 04:10, Paul Parry <pa...@bad-dog-designs.co.uk> wrote:

Hi Alex,

The electronics were custom designed, and one of the members of this group kindly did the PCB layout / design.  There was an analogue processing board that had 2 channels ( 10 pictured, so 20 channels ) That contained a butterworth filter for selecting the desired frequency band, you can see at the bottom of the board the relevant components are fitted, as they determine the frequency so during test and setup they get fitted. The rest of the circuitry linearizes the signal and then some circuitry to drive the IN-13. 

There is then another board that isolates and amplifies the incoming audio, and provides the 120v dc for the tubes.

<IMG_20171115_1216430.jpg>

Here's a view of the complete set up inside the case: 

<IMG_20180802_150246.jpg>

They are quite a job to put together, as I only made them in small quantities, the boards were all SMT assembled by hand which took a good 30 hrs to build up a set up, and then each channel had to be individually 'tuned' so you need a calibrated signal generator and a scope, but as it is all analogue you end up with an instantaneous response and the selectivity of the channel is very precise.

Best wishes,

Paul

On Thursday, 24 June 2021 at 09:31:44 UTC+1 Alex wrote:

Hi Paul,

Can I ask what electronics you used for these? Was it completely custom or something bought in? I know I have a case of in13 somewhere (and many cases of in9) so should plan something with them and this looks very nice!

Cheers, Alex

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<IMG_20171115_1216430.jpg>

<IMG_20180802_150246.jpg>

[Simon Law]

Beautiful work Paul!

[Bill Notfaded]

Will that's a pretty neat project as well.  The time you must have put into figuring out the best way to handle the code must have had some trial and error for sure!  The way you can put any number of 4 tube boards together and it adapts is really neat.

Bill