[Johnson] Question on a Valiant.

[Ray, W2EC]

There are different shunts involved, make sure you are referring to the
same ones. Sounds like Dutch is referring to R57, the 5.1 ohm shunt (for
the grid current) while Tom is referring to R58 which is the 500ma full
scale shunt 0.202 ohms. There are also several others, R55 and R56 are
2.2 ohm shunts and R59 is the 250ma scale shunt.

Ray W2EC


W4UOC@aol.com wrote:
> 
> In a message dated 7/7/2002 10:34:40 PM Eastern Daylight Time, wb7dyw@ev1.net
> writes:
> 
> > I will take some measurements tomorrow and let you know; I was told that the
> > shunt resistor is the wrong value (I have 5.1 Ohm's now).
> 
> There was a write up in Electric Radio magazine a few years ago tha the shunt
> resistor changes.  It is just a short piece of nicrom wire between the center
> tap of the  high voltage transformer and ground.  I had the same problem with
> one of my Valiants and I shortened the nicrom wire by about 1/4 inche to
> reduce the resistance to .202 Ohm.  Needless to say your 5 Ohms is much to
> high.
> 
> Tom Koch - W4UOC
>  <A HREF="http://members.aol.com/w4uoc/index.html">W4UOC's Home Page</A>
> 
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