Re: voltmeter offset and accuracy in K2
Posted by
JEAN-FRANCOIS MENARD-3 on
Jul 24, 2005; 1:03pm
URL: http://elecraft.85.s1.nabble.com/voltmeter-offset-and-accuracy-in-K2-tp380698p380709.html
Thanks, I will try and let you know my result !!!
73
Le 05-07-24 à 07:32, W3FPR - Don Wilhelm a écrit :
> 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
>
>
======
Jean-François Ménard / VA2VYZ
======
_______________________________________________
Elecraft mailing list
Post to:
[hidden email]
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.htmElecraft web page:
http://www.elecraft.com