Topband: Bi-Directional Beverage Question - DXE Polarity

[Bob Eldridge]

1.  It could be a convenient accident.
2.  If on purpose, the answer is probably "Just in case this is 
useful".  But then you would expect DXE to draw attention to it .
3.  Useful that this has been "discovered" and brought to our 
attention.
Bob VE7BS
>> So other than phasing two Beverages, has anyone found a reason why 
>> DX
>> Engineering does this?