[Elecraft] KAT500 question...

[Dave Cole]

Hi Don,

Good idea, thanks.  I will do just that.  My station is due for a total 
rebuild in the next month, and I will be implementing a patch panel for 
all connections...  That should take care if the issue if that is it...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 11/18/20 2:20 PM, Don Wilhelm wrote:
> Dave,
> 
> In that case (no relay clicks), I would examine all connections in the 
> feedline carefully.
> My thinking is that there is something that changes conduction quickly 
> (slightly bad connection) when power is applied.
> 
> If it starts again, see if it continues when running into a dummy load.
> 
> 73,
> Don W3FPR
> 
> On 11/18/2020 4:59 PM, Dave Cole wrote:
>> Hi,
>>
>> Thank you for the response...  I was running the tuner in MAN mode...  
>> I did the tuner training a while ago...  No relay clicks are 
>> associated with the SWR jump.
>>
>> Interestingly enough, the entire issue seems to have ceased 
>> happening...   I am sure it will come back, as I have seen it before...
>>
>> 73, and thanks,
>> Dave (NK7Z)
>> https://www.nk7z.net
>> ARRL Volunteer Examiner
>> ARRL Technical Specialist, RFI
>> ARRL Asst. Director, NW Division, Technical Resources
>>
>> On 11/18/20 1:38 PM, Don Wilhelm wrote:
>>> Dave,
>>>
>>> Are you running with the KAT500 in MAN or TUN?
>>> After you have trained the KAT500 to the antenna (see the manual for 
>>> the bin sizes for each band), you should switch it to MANual.  That 
>>> will keep it from trying to TUNe when you first transmit.
>>>
>>> 73,
>>> Don W3FPR
>>>
>>> On 11/18/2020 2:56 PM, Dave Cole wrote:
>>>> Hi,
>>>>
>>>> I have a quick question regarding operation of my KAT500 tuner.  I 
>>>> have a K3 feeding a KPA500, feeding the KAT500, feeding a 6BTV 
>>>> vertical which is tuned up well, and can run with the tuner in 
>>>> bypass, and keep SWR below 1.7:1 on all bands...
>>>>
>>>> If I am using the KAT500 as a tuner, and I watch the SWR indicator 
>>>> on the KAT500, for an instant, at key-down, I see greater than 3:1 
>>>> SWR, then it drops to normal, all in within a few milliseconds, to 
>>>> microseconds.  Every so often this will fault the amp.
>>>>
>>>> If I put the tuner in bypass everything is normal...  No issues, the 
>>>> SWR indicator operates as normal, the amp never faults...
>>>>
>>>> Anyone have a guess as to what is happening?
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