Don, Do you think after the voltage will be "adjust" according to an
external DC voltage and an accurate external volt meter, if we change
later the DC source supply, like a battery with a little bit
different voltage, instead of a standard power supply by example, do
you think there will be or might be another voltage offset or it will
be calibrate for any kind of DC supply in the range of, let say, 12V
to 14V ???
Maybe an error offset will be anyway present, and by changing the DC
source it could increase the offset error and indicate an improper
value again....
Sorry for the clumsy question.... ;-)
Le 05-07-24 à 09:13, JEAN-FRANCOIS MENARD a écrit :
I'm planning to use a little higher value trimmer, so I would be
able to be more or less in a second. I let you know wich one I
use... I would like the really smaller one (in size) that it can
take not much space as the actual resistor.
Le 05-07-24 à 09:03, W3FPR - Don Wilhelm a écrit :
Folks,
After thinking about this voltmeter 'adjustment' a bit more, I
discovered I
had erred. The value of R10 should be INCREASED to make the
reading higher.
Sorry - I guess I had a 'senior moment' and got my head turned
around wrong.
73,
Don W3FPR
-----Original Message-----
Jean-Francois,
You certainly could do that - it should not alter any other
function that I
am aware of. The current display can be trimmed by changing
Control Board
R7.
R10 and R7 are 1% resistors, and that provides repeaability from
one K2 to
another - one could hand-pick from 5% resistors just as well.
I personally would be concerned about leaving a trimmeer in place
because of
the possibility of the setting being changed, but certainly using
a trimmer
to determine the exact value required would be an easy method.
73,
Don W3FPR
-----Original Message-----
Hi Don,
You said : "By lowering the value of R10 ..." Could I just put a
trimmer near that value instead of R10 and tune the trimmer so that
the voltage displayed match more closer the real external
voltage ???
And could I do limilar thing with the current display ???
I don't want to be more catholic than the Pope, but is it
possible to
do those mods ???
Best 73 from a junior ;-)
Le 05-07-23 à 18:56, W3FPR - Don Wilhelm a écrit :
Steve,
Although some have been confused by the readings at first, I don't
see any
advantage in modifying the internal voltmeter to read the external
supply
voltage - what it reads is the actual voltage the K2 is operating
at - but
if changing it is your choice, by all means do it - it should be a
simple
task of padding R10 (or lowering its value a bit).
======
Jean-François Ménard / VA2VYZ
--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.338 / Virus Database: 267.9.4/57 - Release Date:
7/22/2005
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
======
Jean-François Ménard / VA2VYZ
======
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
======
Jean-François Ménard / VA2VYZ
======
======
Jean-François Ménard / VA2VYZ
======
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
