[Elecraft] KXPA100 PROBLEMS

[bs usb]

I have a KX3 (serial #7551).  I just bought a KXPA100 (serial #1566).

The amp works fine when configured in basic cable setup.  My NYE MB-V-A 
wattmeter indicates 100 watts out to the antenna.

It does not work with the KXPACBL setup.

Both units have the current firmware.

KX3 has tune=nor, txeq=reset, cmp=0, baud rate on both units is the 
same, the amp does not have the optional atu, ant2 has been disabled in 
the configuration since it does not exist.

The amp does not power up when PA MODE = ON is selected in the KX3 
menu.  PA MODE = ON is displayed for a few seconds then reverts back to 
PA MODE = OFF.

The little box with the CAT cable connector has three holes in it,  Two 
of the holes are sealed.  The third hole, located next to the RCA 
connector is open.

I am guessing the problem is either a bad cable or, more likely, 
operator error.  Perhaps a menu term has been set improperly.

One more symptom, If I turn on the amp manually after the PA MODE = ON 
goes to PA MODE = OFF,  both the ON and TX leds come on. When that 
happens I can still hear signals from the KX3 speaker but at reduced volume.

-- 
K5DKZ