1 Apr
2008
1 Apr
'08
11:10 a.m.
Hi,
Pls, have a look at this description of Signetics 25000 series 9046 XN
component: http://pichotjm.free.fr/humr/2.html
Can you explain me, what is Vff? Is it a good idea to decrease this voltage
in order to increase reliability?
But what will happen with our 50 Hz european supply?
I need help...
(please, answer with simple english)
JM Pichot
2 Apr
2 Apr
3:26 a.m.
I think you need 1kV for Vff so you can use the hiden HSC feature.
50Hz is a little fast for HSC I think .5 to 1Hz should be fine.
-Rik
----- Original Message -----
From: "pichotjm" <pichotjm at free.fr>
To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org>
Sent: Tuesday, April 01, 2008 8:10 PM
Subject: What is a FINO? Need about Vff.
Hi,
Pls, have a look at this description of Signetics 25000 series 9046 XN
component: http://pichotjm.free.fr/humr/2.html
Can you explain me, what is Vff? Is it a good idea to decrease this
voltage in order to increase reliability?
But what will happen with our 50 Hz european supply?
I need help...
(please, answer with simple english)
JM Pichot
4:21 a.m.
PS. HSC should not be mixed with ISC or MS that would give unwanted results
This because HSC is white and ISC brown and MS varies a lot.
----- Original Message -----
From: "Rik" <dr.emiel at xs4all.nl>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Wednesday, April 02, 2008 12:26 PM
Subject: Re: What is a FINO? Need about Vff.
I think you need 1kV for Vff so you can use the hiden
HSC feature.
50Hz is a little fast for HSC I think .5 to 1Hz should be fine.
-Rik
----- Original Message -----
From: "pichotjm" <pichotjm at free.fr>
To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org>
Sent: Tuesday, April 01, 2008 8:10 PM
Subject: What is a FINO? Need about Vff.
Hi,
Pls, have a look at this description of Signetics 25000 series 9046 XN
component: http://pichotjm.free.fr/humr/2.html
Can you explain me, what is Vff? Is it a good idea to decrease this
voltage in order to increase reliability?
But what will happen with our 50 Hz european supply?
I need help...
(please, answer with simple english)
JM Pichot
11:20 a.m.
JM Pichot wrote about the Signetics 9046:
Subject: What is a FINO?
FINO is First-In-Never-Out.
Can you explain me, what is Vff?
Filament voltage.
Is it a good idea to decrease this voltage in order to
increase
reliability?
Not really. If you decrease it sufficiently to extend the life of
the filament, the circuit won't function correctly.
But what will happen with our 50 Hz european supply?
You need to get the 50 Hz rated version of the part. Contact your
Signetics sales representative.
Eric
3:03 p.m.
Hi,
Pls, have a look at this description of Signetics 25000 series 9046 XN
component: http://pichotjm.free.fr/humr/2.html
Can you explain me, what is Vff? Is it a good idea to decrease this voltage
Almost certainly filament (heater) voltage. It should be 6.3V (rms AC, or
I guess DC). Note the sudden vall in Iff if Vff much exceeds 6.3V -- this
is _not_ reversable, if you get to this point, you'll never get much Iff
through the same device in the future.
in order to increase reliability?
No. Too low a Vff leads to a poisoned cathode.
But what will happen with our 50 Hz european supply?
It shoul;dn't make ay difference. Or at least it didn't when I used a
related-technology device.
-tony
6108
days inactive
6109
days old
4 comments
4 participants
participants (4)
-
ard＠p850ug1.demon.co.uk -
dr.emiel＠xs4all.nl -
eric＠brouhaha.com -
pichotjm＠free.fr