HI CUR on 15 meters

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HI CUR on 15 meters

Kirk Brown-2
I  get a HI CUR warning on 15 meters when connected to my 40 meter dipole. I
can only run about 7 Watts before the limit (2.5 amps) is reached. I am
getting full output (12 Watts) and about 2.25 amps draw when the dummy load
is connected. My SWR is ok on 15--about 1.4:1--and I am getting out ok. 40
is fine. I have some TVI issues on 15 but I think that is a separate issue.
This is a stock K2 with no upgrades.
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RE: HI CUR on 15 meters

Don Wilhelm-3
Kirk,

There are several possibilities.

On the K2 side, you could have one too many turns on L23 and/or L24 causing
the LPF to be tuned a bit too low.  This usually shows up with a test on a
dummy load, but is worth checking anyway.

At your antenna, the SWR alone does not tell the whole story - what is the
resistance and the reactance when measured with an antenna analyzer?  If
there is a significant amount of reactance, it could de-tune the low pass
filter in the K2, and if the resistive element is not near 50 ohms, that
will also tend to cause problems.

If the Low Pass filter is found to be OK, you could try lengthing or
shortening your feedline and electrical 1/8 wavelength for 15 meters at a
time (up to 3/8 wavelength total) to see if you can achieve a feedpoint
impedance that will work better.  You could also use an antenna tuner with
that antenna.

73,
Don W3FPR

> -----Original Message-----
>
> I  get a HI CUR warning on 15 meters when connected to my 40
> meter dipole. I
> can only run about 7 Watts before the limit (2.5 amps) is reached. I am
> getting full output (12 Watts) and about 2.25 amps draw when the
> dummy load
> is connected. My SWR is ok on 15--about 1.4:1--and I am getting out ok. 40
> is fine. I have some TVI issues on 15 but I think that is a
> separate issue.
> This is a stock K2 with no upgrades.
>
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