[Elecraft] KX1 VFO noise

[K4elv at bellsouth,net]

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.  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 also mimic the noise.  Thanks,  Mike K4ELV