[evlatests] EVLA antennas

[Rob Long]

Ant 18 is up with all 4 IFs, but still has old versions of the L302 (as 
Matt mentioned earlier).

Ant 13 is dead for the evening.  An aluminum spacer was accidentally 
dropped behind the power distribution board in the front-end rack and 
shorted the -48V to ground.  When I got to the antenna to take a look, a 
burned trace on the board was discovered.  The board will be replaced 
tomorrow and the lexan covers that were being installed (to prevent 
accidental shorting!) will be finished as well.  I disconnected the 
vacuum solenoids from all receivers in ant 13 and will hook them back up 
after the FE rack has power again.

Antennas 14 and 16 have the latest version of the T304/T305 (with TPD) 
downconverters installed into IFs A and C.

Rob