[Elecraft] K144XV Strange Readings

[Michael Eberle]

Dave,

Yes that is exactly what it appears to be doing.  My frequency counter 
is showing RF at 153.600 MHz regardless of what part of the band it is 
tuned to.  I removed the K144XV Reference Lock Board and there was no 
change.  Is there anything that can be done to correct this, or do I 
need to send it back to Elecraft?  I just bought it 2 months ago so it 
shouldn't be an early production run board.

Thanks,
Mike KI0HA

On 5/17/2013 6:50 PM, WW2R Elecraft wrote:
> Both my early edition K144XV were not unconditionally stable and were swr
> intolerant
>
> I think you will find that the 3:1 swr is because it is oscillating "out of
> band". Try listening on a scanner. I have experienced this on my two k144xv
> and g4ddk had the same issue with his. One example produced 162MHz, one
> 168MHz one around 158MHz. When you tune or speak it stabilizes and generates
> on 2m   My k144xv were fine if I operated at the bottom end of 2m where the
> swr was 1.1:1 but my antenna swr rose to 1.6:1 at around 144.8MHz  and above
> this point it showed the instability you mentioned
>
>
> Mine were replaced with the later production run k144xv (the one without the
> centre spacer, but that could just be coincidence!) and the issue has not
> arisen since
>
> Dave
>
> G4FRE
>
>
>
>   
>
> Message: 19
> Date: Fri, 17 May 2013 05:26:24 -0500
> From: Michael Eberle <mteberle at mchsi.com>
> To: Elecraft at mailman.qth.net
> Subject: [Elecraft] K144XV Strange Readings
> Message-ID: <519605D0.20209 at mchsi.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> I've noticed strange behavior on both the W2 watt meter and a
> cross-needle meter when using my K3 on 2 meters.  Just curious if anyone
> has had problems like this?  In SSB mode, keying the mic without any
> audio causes the watt meter to show about 3 watts output power and 3:1
> SWR.  However If I hold the TUNE button and put out a carrier It shows
> the expected 7-10 Watts forward with normal low SWR.  It also appears to
> show normal readings while speaking into the mic, but goes to the
> unusual readings with in between audio peaks.
>
> Thanks
> Mike KI0HA
>
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