[Elecraft] KX 1 VFO noise

[k4elv at bellsouth.net]

I sent an email to the group yesterday and received a reply stating that the mailbox was full??  So, I'll resend my request for help.  
I haven't used my KX1 since I completed assembly a few weeks ago. At that time 
all seemed well. In preparation for a trip I got the unit out to test it. I 
found that as the VFO was tuned a "popping or clicking" noise is heard each 
time the display moves. It sounds like statis from a counter?? I seem to recall seeing this mentioned by the group 
but I can't find a reference. Any ideas? External battery voltage is 
approximately 12.4 volts. Internal batteries are low, but I still hear the sound.  Thanks, 
Mike K4ELV