[UK-CONTEST] Preventing IF breakthrough

[John Simkins g8iys]

This must be the best source of ideas to solve my current problem. I am 
attempting to commission a 2m transverter (Elecraft XV144) along with a 
Kenwood TS590S. The combo employs a 28 MHz IF. Given the recent highs on 
28 MHZ, I have discovered enormous signal levels on 10m breaking through 
- even though the transverter antenna input is terminated in a 50 ohm 
dummy load and the IF in/out leads are short and well connected and the 
PTT leads are disconnected. I suspect that the culprit is the dc power 
cable to the transverter which is over a metre long and fresh out of box 
ie no chokes on it. Any experiences and recommendations, please. 73 
John. G8IYS.