Depends on how and where you disconnected the trigger - may need to load down that pin. Can you confirm that lifting the wiper DOES trigger the tube? You could set up the right conditions on the other pins [including trigger] and then interrupt that circuit manually. If it is a 'glitch' from the wiper, a capacitor/resistor network should improve things. Let's see what is forthcoming from all the others here. John K Australia ----- Original Message ----- From: bob harper To: neonixie-l@googlegroups.com Sent: Thursday, March 27, 2014 6:34 PM Subject: [neonixie-l] Re: trigger tube equivilents
hi all...well i have finally got this thing working...all trigger tubes, in the selection system the countdown tubes in the credit unit and the 3 digital display nixie tubes...but ONE remaining problem. the 1st tube on the left in the schematic a GR44 [i have tried another as well] fires when it should, but also when it should not, i disconnected the trigger and it still fires...the problem [i think] is that the K cathode is connected via a wiper contact on a rotating arm to the reset solenoid, which although cleaned and adjusted and tested with the meter, must be occasionally losing its contact [bear in mind the etched track is 50 years old] for a split second.......clip..... -- 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 neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/A7552ABCC17545249339C8D11AEDCD0B%40compunet4f9da9. For more options, visit https://groups.google.com/d/optout.
