I seem to remember Morris posting that he had used a Phantastron in
something of his?
John K.
----- Original Message -----
From: [email protected]
To:
Cc:
Sent:Mon, 10 Feb 2014 12:59:49 -0700
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.net.
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/fbae2d4fd62070fed0b008c553681a7477bc1055%40webmail.internode.on.net.
For more options, visit https://groups.google.com/groups/opt_out.
