[Elecraft] K3 TVI on 40 meters only

[Dave Cole]

At least the issue is not important as it is only TV being disturbed, 
not your ham radio receive!  :)

73s and thanks,
Dave
NK7Z
http://www.nk7z.net

On 08/25/2017 03:24 PM, Mike Pilgrim wrote:
> Recently replaced my ic-7600 with a new to me K3.  I don't recall this issue
> when using the ic7600, but I now have TVI in my u-Verse TVs when using the
> K3 on 40 meters, primarily on CW, with diminishing evidence on SSB up to
> 7.2.50 but okay above that.  The symptom is pixilation on the screen, then
> audio blanks out, and finally the set top box will completely lose signal.
> This occurs on two TV operating on wireless set top boxes, and two hardwired
> with CAT-5 cabling.  I have tried on three separate end-fed long wires fed
> by coax through a 9:1 UNUN, two with feedline length of 100' and the third
> approximately 60 feet.  I can operate satisfactorily on all bands from160 to
> 10 Meters with exception of 40 Meters on all three antennas.  The K3 auto
> tuner indicates 1 bar of SWR with output power anywhere from 10 to 100
> Watts.  I have also used an external ATU with same results.  I have looked
> at everything I can think of, including terminating each antenna port with a
> dummy load, but to no avail.  I've traced out all grounds and coax
> connections.  Nothing helps.  What might I be overlooking?  Is there an
> inherent issue in the K3 which might attribute to this symptom?  That seems
> likely since I don't recall this problem when using the same antennas with
> the IC-7600.  I welcome any ideas or suggestions for where to look next.
> 
> Thanks,
> 
> Mike, K5MP
> 
> mpilgrim at bellsouth.net
> 
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