[Elecraft] Sub rx "S" meter

[telegrapher at att.net]

I attached my 6 meter beam to the SUB rec. this am as it appears 6 mtrs is about gone for a while.  Anyway while reading thru the manual to see if the sub rx was working as it should i noticed the S meter reading setting up around 35 over S9 with the antenna  hooked to the RX ANT in.  WOW.  Disconnected it and the reading fell back to around 25 over 9.  Is there an adjustment to get this down to a respectable reading?  A calibrate circuit for the SUB rx?  I was in bSET btw like the book said.  When using the regular receiver it works as it should, just the sub rec is way out of line.  And i do hear the difference when i disconnect the antenna so it's something inside.  Or am i doing something else wrong?  What a radio.

Larry
W0OGH