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 > > > > > > > > > > > > > > -- > > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/a1334243-476e-4730-acc7-4988a1430eb4n%40googlegroups.com. >
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