Yes, I found a HP pre-nixie counter that uses it, but no clear theory. eric
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of David Forbes Sent: maandag 10 februari 2014 21:00 To: [email protected] Subject: Re: [neonixie-l] Elesta EZ10/A/B tester refurbished! On 2/10/2014 12:44 PM, Tidak Ada wrote: > Hmm could be, but despite I have heard about it, I am not familiar > with the Phamtastron circuit. Does it deliver a sine or an block/pulse at the output? > I have to look for some clear theory. > > eric Eric, Google does not help with the Phantastron, as someone borrowed the name for a product. The circuit is also called a Miller sweep circuit. It is used in oscilloscopes, and in old digital pulse circuits as a frequency divider. A pentode tube generates a sawtooth wave, and is triggered to reset by a synchronizing signal only when near the end of the sweep. Look at any old HP frequency counter for a decimal divider using the Phantastron. They were also used in early television sync generators. This is why the old television line count was a product of small numbers such as the US 525 line TV: 525 = 5 * 5 * 7 * 3. --David Forbes -- 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/52F92FB5.2060504%40dakotacom.ne t. For more options, visit https://groups.google.com/groups/opt_out. -- 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!AAAAAAAAAAAYAAAAAAAAAPDddShx705MuX20yCpp0vvCgAAAEAAAAP18rwiZcVNDhHs762BnYrkBAAAAAA%3D%3D%40zeelandnet.nl. For more options, visit https://groups.google.com/groups/opt_out.
