[Elecraft] Oscilloscope help part 2 ;-)

[JEAN-FRANCOIS MENARD]

My oscilloscope have only an input amplifier bandwidth of 14 Mhz 
maximum... will it be enough to adjust all bandpass on all bands ???


Le 04-06-20, à 18:29, Don Wilhelm a écrit :

> When adjusting the bandpass filters for transmit, I do use a 'scope.
> The 'scope is doing nothing more that acting as a sensitive analog RF
> voltmeter, so nothing complex is required on setting the 'scope time 
> base.
>
> Just connect the 'scope probe across the dummy load (I use a 10x 
> probe),
> press TUNE on the K2 and you should see an RF envelope display on the 
> 'scope
> face - if not adjust the vertical amp and the trigger level until 
> something
> is displayed - then set the time base so you are seeubg the CW envelope
> rather than a few cycles of the RF.
>
> As you adjust the bandpass filter, you should see the vertical 
> deflection on
> the 'scope face shrink and grow in response to the tuning - adjust for 
> the
> largest display height.
>
> 73,
> Don W3FPR
>
> Life is what happens when you are making other plans
>
> ----- Original Message -----
>
> My second question is, like in the manual of the K2 on page 75
> regarding 40 meter transmitter alignement, telling that we could use an
> oscilloscope to adjust all band pass filter in the K2.
>
> Ok, now I have one, but now where do I put my probe in the K2 and what
> should I expect to see on the scope when the bandpass are correctly
> adjust or disadjust ??? I should expect that I go the same way for all
> bandpass filters ???
>
> As a newbie I am, I must have a more detail routine to do some stuff
> like this. But be sure this will help me !!! ;-)
>
>
>
===============================================
Jean-François Ménard / VA2VYZ
va2vyz at rac.ca

Club d'Astronomie Amateur de Sherbrooke
Club Radio Amateur de l'Estrie

Mon site web personnel : http://homepage.mac.com/jfmenard
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