Is it only the transormer or also the deflecion coils that make sound? I am highly interested in the schema! ;-) eric
_____ From: [email protected] [mailto:[email protected]] On Behalf Of Morris Odell Sent: donderdag 18 december 2014 9:37 To: [email protected] Subject: Re: [neonixie-l] Sperry Radar Clock almost done Thanks all for your kind comments. The CRT is a 7ABP7A and the little nixie tube displays the number of satellites visible to the GPS receiver in the master clock wifi sender. I did have the power transformer vacuum impregnated by a transformer shop but to no avail. The noise was minimised by keeping the drive waveform as close to a sine wave as possible and rubber mounting the transformer but at 900 Hz there's obviously some magnetostriction going on that can't be reduced. The noise is picked up by the mechanical structures and putting on the cover makes little difference. Morris -- 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 post to this group, send email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/6915e79d-535e-4f45-bc14-af585fa f6b4f%40googlegroups.com <https://groups.google.com/d/msgid/neonixie-l/6915e79d-535e-4f45-bc14-af585f af6b4f%40googlegroups.com?utm_medium=email&utm_source=footer> . For more options, visit https://groups.google.com/d/optout. -- 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 post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/!%26!AAAAAAAAAAAYAAAAAAAAAPDddShx705MuX20yCpp0vvCgAAAEAAAAI%2BUDMarXMhIsfnAms2i0NEBAAAAAA%3D%3D%40zeelandnet.nl. For more options, visit https://groups.google.com/d/optout.
