Grahame wich tube is more usefull to focus on to drive dekatrons: the GTE175M or the GDT125T ? I liked to make a clockrate divider beginning with two Elesta EZ10B, followed by three Sylvania 6879's, preferrably driven bij cold cathode tubes, and avoiding semiconductors. the highest frequency to manage is 400kc's
eric -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Grahame Marsh Sent: woensdag 23 maart 2011 18:40 To: [email protected] Subject: Re: [neonixie-l] Re: 3rd try! Mullard Z700 U trigger tubes Some XC24 did go on Ebay - perhaps a year ago now - I missed the auction totally but did ask the vendor if he had more but alas not. However, your suggestion Nick, of using a pair back to back does work fine. In fact mullard documentation suggest that - i.e. using two Z700U rather than a single Z700W (has two triggers). GTE175M does appear on Ebay - I've bought about a dozen. My focus is now on the Z700U - this can be used in ring counters and also as an interstage dekatron link. I usefulness of the Z700U is it has a keep alive cathode and so works in complete darkness. My XC18 trigger tube clock is for demonstration use only - it dies in complete darkness (a 8W UV lamp over it does keep it operating). I also want to try using a Z700U as a relaxation oscillator driving a dekatron as a variable speed spinner a la three neurons. Grahame On 23/03/2011 16:41, Nick wrote: > I'm still looking for some XC24s... never even detected a hint of any > anywhere... > > Nick > -- 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]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB. -- 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]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
