I am in the process of building an audio preamp using valves and I am using nixie tubes to indicate the volume control position. I am using two nixie tubes to indicate the volume and they are being multiplexed via a PIC and 74141.
My question to you fine folk is how should I provide power to the nixie tubes. I have two options available to me: 1) Use the +200V rail being provided via a shunt regulator off the linear regulated +250V rail used for the valve HT. (The +200V is used for providing power to the screen within a magic eye tube). 2) Use a separate SMPS HT source just for the nixie tubes (it is one of the tayloredge designed ones). I have both options available to me, number one being more simple as the HT is already there, however I am concerned that the switching noise from the multiplexing will be heard on the audio output due to the multiplex switching noise propagating onto the HT supply (am I being overly paranoid, or will this not be seen due to the more than adequate capacitance being used on the HT rail). Of course there is option 2, but I then have the concern of the SMPS radiating noise into the audio path. Both options have there pros and cons and I think I may well resort to trying both and seeing what happens but I would love to hear your ideas and suggestions to which you think should be implemented. Regards, Tim -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msg/neonixie-l/-/Q29jIq-xMNkJ. For more options, visit https://groups.google.com/groups/opt_out.
