[Elecraft] K3 - bad CW note

[Ian White GM3SEK]

Curt Knight wrote:
>
>So I wonder if there is an assembly error that might be a contributing 
>factor.  What I'm looking for is some internal part that should be 
>grounded but isn't, or vice versa.  Before I dig into it I'm hoping 
>that those of you with more K3 experience than I have can suggest a 
>place to look.  In the meanwhile, we are going to try for symptomatic 
>relief by using isolation transformers, etc.
>

You might also try a few diagnostic tests using a clamp-on RF current 
meter. You can probably make one in a half-hour from materials on hand, 
like this:
http://www.ifwtech.co.uk/g3sek/clip-on/clip-on.htm#Constr

This meter will show whether or not you really do have significant 
amounts of stray RF; and it will let you measure how much effect your 
treatments are having.

It's so simple, and so effective.


-- 

73 from Ian GM3SEK         'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek