Graham, Reading some schema's I got in the meanwhile, it looks as the phantastron isn't able to divide frequencies in the MHz region. Yours starts at 60 c/s and the HP532A counter from 10 kc/s and below. Is there any evidence it is possible to divide down from 4MHz to 400 kHz? I am getting afraid that will be very difficult.
eric -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Grahame Marsh Sent: dinsdag 11 februari 2014 23:14 To: [email protected] Subject: Re: [neonixie-l] Phantastron divider On 11/02/2014 22:07, John Rehwinkel wrote: >> I've built a few dividers down to 1Hz and they work phantastically. Always use the 6AS6 and not just any pentode. > However, Eric said he wanted a low power implementation. Which makes me wonder if any of the subminiature pentodes out there could be pressed into service. Due to the way the rod pentodes work, I think they wouldn't work well. I'm guessing the trick is how G3 causes the current to divide between G2 and the plate. I may have to grab some tubes and breadboard some stuff. > > - John > The heater power alone can be just a killer. My (poor) understanding is the design of 6AS6 g3 is as a control grid proper, like g1. And not there to repel secondary electrons from the anode. I would guess that a given pentode must just be road tested to see if it will work - as you say time to breadboard something. G -- 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/52FAA0B4.5020200%40googlemail.c om. 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!AAAAAAAAAAAYAAAAAAAAAPDddShx705MuX20yCpp0vvCgAAAEAAAACtmUy72ZxdLjIj5qv2UgcYBAAAAAA%3D%3D%40zeelandnet.nl. For more options, visit https://groups.google.com/groups/opt_out.
