[Elecraft] K3 - Removing screws with split lock washers - care...

[Stewart Rolfe]

When loosening screws that have split lock washers underneath, the washer
often turns with the screw initially and scores (or worse) the
underlying copper earthing ring; earthing could be affected but also
there may be copper 'filings' floating around the rest of the board.


I've just replaced the DSP board on K3 #145 due to a minor
fault which only came to light after fitting the KRX3 (scratchy audio
for 10 -15 minutes after switch on while the front panel warms up and
which disappears when the aux dsp is removed - presumably a faulty aux
dsp I/O on the main dsp board); I found I'd slightly damaged the
mounting holes while removing the 3 metal pillars that support the aux
dsp pcb.


If I was doing this for another reason which meant
re-installing the main dsp board it would be much better in this
particular instance to hold the screw still with a cross-head
screwdriver and loosen by undoing the pillar on the other side with a
nut driver; that way the washer should stay still and not scrape the
copper ring.


Incidentally, dealing with Elecraft support was easy,
efficient and totally painless. If only the rest of life was this
good......

Apologies to anyone who has read this before when I originally posted this message via Nabble; for some reason Nabble didn't want to forward it here.


73,


Stewart Rolfe, GW0ETF


(Hoping to be C56/GW0ETF with the rejuvenated K3 late Feb/early March...)