[Elecraft] [KX3] Hi Curr Warning

[Gary Hawkins]

Hi Gerry,

The unit does not appear to be hot.

Gary

On 12/13/2013 4:20 AM, Gerry leary wrote:
> Is the radio getting too hot?
>
> Sent from my iPhone this time
>
>> On Dec 12, 2013, at 9:11 PM, Gary Hawkins <gary at hawkins-zhu.com> wrote:
>>
>> Hi Ron,
>>
>> Thanks for your response but could you clarify.
>>
>> On the 12/10m bands I'm not sure of the VSWR of the antenna, but the VSWR reported by the ATU was 1 to 1, so basically the amp was perfectly matched and should have been OK.  Now the fact that I had the radio set for 10W rather than 8W on 12/10m might be an issue if the KX3 was over driving.  However, I'd made the assumption that the KX3, knowing it's band, would just limit automatically - that might not have been correct.
>>
>> Gary KK6GXD
>>
>>
>>> On 12/12/2013 6:56 PM, Ron D'Eau Claire wrote:
>>> Not just "low" antenna impedance, but high SWR. The output stage is less
>>> efficient when the SWR is high so it draws more current to produce the
>>> requested output.
>>>
>>> 73 Ron AC7AC
>>>
>>> -----Original Message-----
>>> From: elecraft-bounces at mailman.qth.net
>>> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Gary Hawkins
>>> Sent: Thursday, December 12, 2013 4:36 PM
>>> To: elecraft at mailman.qth.net
>>> Subject: [Elecraft] [KX3] Hi Curr Warning
>>>
>>> On my last two SOTA outings I've experienced HI CURR warning with the KX3.
>>> I've read this is associated with low battery voltage or low antenna
>>> impedance.  I think at one time there was also a software bug associated
>>> with specific settings that was fixed with a firmware release.
>>>
>>> My setup consists of KX3, with ATU, 1/4 wavelength vertical cut for 20m.
>>> SLA battery, well charged, operating above 12V under load. Antenna fed from
>>> 50ft co-axial cable, 30ft counterpoise connected to ground of KX3.  TX power
>>> set to 10W
>>>
>>> Both times I was operating on 15 or 10m.  ATU was tuned, showing 1:1.0
>>> match.
>>>
>>> Does anybody have any idea what is causing the HI CURR warning?
>>>
>>> After it happens, TX power reduces to 5W.  CMP and ALC bars display - no
>>> matter what I do I can't get these indicators to go in favor of SWR and RF.
>>> Even if I power off the KX3 it still comes up in this display mode.
>>> Finally, for no apparent reason, after five to ten minutes it then seems to
>>> switch back to SWR and RF display.
>>>
>>> Looking forward to your input,
>>>
>>> Gary
>>> KK6GXD
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