Google for "in13 nixie" and the first hit is this:
http://www.ledsales.com.au/cart.php?target=product&product_id=157
http://www.ledsales.com.au/cart.php?target=product&product_id=157
wim said:I bought some nixie bargraph's (IN-9 and IN-13) an i intend to use them as audio VU-meters for my amp, but i seems to be a hard job to "google" a schematic to drive them.
Is here anyone who can help me getting a schematic or so?
As usual, the neonixie-l group on Yahoo!!!! is your friend. (I note that several of us lurk here, including the incredible Alek and his home-made tubes - he's still the only person we know to have made a home-made nixie.).
See the files section:
Files > Other readout technologies > Neon Bargraph Indicators
For drivers, see:
VU driver for IN-13 & IN-9
Various driving strategies for IN-9 & IN-13
A simple kit to play with...
HTH
Re: Re: Nixie bargraph as a audio VU-meter
Hi Nick, another Neonixie member and DIYaudio lurker
nickds1 said:(I note that several of us lurk here, including the incredible Alek and his home-made tubes - he's still the only person we know to have made a home-made nixie.).
Hi Nick, another Neonixie member and DIYaudio lurker
Has anyone here built a very simple circuit with, say, an ECC81 / 12AT7 driving the above. What I'm thinking of is two bargraph circuits to monitor the cathode current of the OP valves. (current mirror ?)
I think it would be interesting to build an RTA with 31 of these.
https://www.youtube.com/watch?v=x0NJhbx9IYM
https://www.youtube.com/watch?v=qLzXueWH8qo
I once built one with cheap parts I had laying around.
The IN9/13 tube here is represented by a 2k resistor.
Only problem i remember was the lin/log conversion (the opamp with two transistors) wasnt very stable. You need to glue the two transistors together for temp correction.
If I had to remake it, i'd simply use an old radio tube: EBF80
If you are using balanced signals in all your amps, like me, it's a piece of cake to design a circuit to use this tube to drive an IN9/13
The IN9/13 tube here is represented by a 2k resistor.
Only problem i remember was the lin/log conversion (the opamp with two transistors) wasnt very stable. You need to glue the two transistors together for temp correction.
If I had to remake it, i'd simply use an old radio tube: EBF80
If you are using balanced signals in all your amps, like me, it's a piece of cake to design a circuit to use this tube to drive an IN9/13
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