[Elecraft] Elecraft] K3 K144XV spurious signal on 144,414.1

[Dave]

Its also by far the loudest sprog I can hear on the 3 K3/K144XV combos I
have tested. Unfortunately for me it stops me hearing the PI7RTD and ON0VHF
beacons 400km away unless they drift to a frequency that I can use my 250Hz
filter to dig them out

Dave
G4FRE 

From: "Sverre Holm (LA3ZA)" <LA3ZA at nrrl.no>
To: elecraft at mailman.qth.net
Subject: [Elecraft] K3 K144XV spurious signal on 144,414.1
Message-ID: <1429428332185-7601496.post at n2.nabble.com>
Content-Type: text/plain; charset=us-ascii

I would appreciate it if other owners of the K3-K144XV would check for this
signal.

It appears as if it is a regular input signal, i. e. it tunes normally. But
it is still there even if the 2m antenna is disconnected or the input is
shorted, so it seems to be internally generated.

I have tried all the tricks I know such as moving of internal cables in the
K3. I also updated the K144XV firmware and that got rid of the spur at the
36th harmonic of the 4 MHZ K144XV processor crystal at 144,005.

But the 144,414.1 spur remains, close to the SK4MPI beacon at 144,412 which
is one of the main indicators of propagation here.