Mike,
With the blue toroids, you do have the updated KPA100. Can I assume
that this problem is a recent occurrence rather than a problem that has
always been there?
Yes, removing and jumpering out the KDSP2 will likely stop it (or just
try putting it in bypass), but that is not the source of the real
problem, it is just the source of the 'pop'.
I would suggest digging into the KPA100 a bit. Lay the KPA100 on its
'back' on a book or box to the right of the K2, remove the shield and
make the diode voltage measurements. Hopefully that will reveal an anomaly.
73,
Don W3FPR
On 6/10/2015 12:45 AM, Mike Fanning wrote:
Thanks for the quick reply Don! I checked the 8R setting and it was indeed set
to hold (and is set there again after toggling it to make sure). I do have the
KDSP2 option with the KPA100, but after peeling off the right side panel I see
two baby blue toroids. The K2 is serial number is 5882 and it was purchased in
December 2006. The KPA100 was bought at Dayton in 2009. I think it took me
another year to get around to building it, so it was probably buttoned up about
5 years ago and has been the backup/receive only rig since doing all the
alignment checks. This will be the first time I have really done any
transmitting with it since adding the KPA100 (I’ll make sure to revisit the PA
screws as instructed). You have given me something else to check though - I
need to pull the KDSP2 and see if that affects the problem. I’m wondering if
there were other upgrades to either the K2 or KDSP2 that might affect this as
well?
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