[Elecraft] My K3 on show no longer works properly

[Bonjour de Marc ! , F4TXR]

Hello everyone ,
My K3 does not work properly in tuning,
I explain myself, even on fictitious load in a totally random way, it 
happens to me from time to time on the bird in series between 
transceiver and charge to me well out 100 w my with many tunes,
I have a lot of ros back during the tests, and from time to time he 
finds the agreement!
What can happen?
Thank you all for your answers ,
73 '
Mark

-- 
**** Pour une petite présentation , n'hésitez pas à visiter ma page sur 
QRZ.com !!!! ****