Altitude indication and PTT switch

[Don_Jack]

Hi everyone, hopefully you can help me with a problem I have.
Everytime I push the PTT switch, the altitude indicator on my SkyView goes up by a thousand feet or and then stabilises.

Any thoughts what may be causing this?

Thanks for any advice.

Don

 

[tniel7331]

Antenna cable is in or too close to Dynon wiring. Every time you key radio that EMI is showing on indicator

 

[Rhino]

Might also be poor quality antenna cable.

 

[airguy]

Is this an older kit? Some of the original EMS units were susceptible to EMF, and Dynon did an upgrade on them.