[Elecraft] Data transmission on 30 meters with PX3 problem

[Martin]

You might want to add a common mode choke.
Look here :

http://www.dg0sa.de/balun1zu4kleinptfe.pdf

It is in german, but the pictures show how easy it is to do. First, the 
choke is shown.
The second core is the 4:1 transformer which you already have.
FT 140-43 cores will do. For higher power, use FT 240-43.
Connect : TRX->choke->Transformer->antenna.


-- 

73, Martin

Ohne CW ist es nur CB...