KPA-500 Fault - follow up

[Elecraft mailing list]

All,

I tried to firmly seat all of the connectors.  No change.  I finally pulled them out and only used the keying cable (RCA to RCA).  No change. One thing I noticed is that the KAT 500 was giving me Power and SWR reading, but no amplification from the amplifier.   And if I had any more than 12w of drive power from the K3, the amp would not give me any reading at all. Dropping it back to under 12w, the Pwr/SWR readings would be visible again.

I decided to disconnect the antenna from the KAT 500 altogether and connected straight into the amp. Low and behold, I now have the amp working again!  

Hence, the problem is with the KAT500 tuner.  I am thinking that a factory reset would do the trick. Question is, how do you reset a KAT 500 to factory default? The manual states to do it with a computer.  Any buttons I can push on the tuner itself for restoring the factory defaults?

Thanks,
Ed NI6S
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[Bob McGraw - K4TAX]

You will need the KAT500 Utility to perform a reset to factory values.  
That software is a free download on the Elecraft site.

While you are at it, download all the various software's for each piece
of equipment.  i.e.  K3, P3, KPA500, KAT500.  They allow you to save
parameters, change parameters, update firmware, and reset to factory
values.   And always make a backup after you make changes.  That way
should things get screwy, you can go back to your previous values.

73

Bob, K4TAX


On 5/16/2020 2:28 PM, Edward via Elecraft wrote:

> All,
>
> I tried to firmly seat all of the connectors.  No change.  I finally pulled them out and only used the keying cable (RCA to RCA).  No change. One thing I noticed is that the KAT 500 was giving me Power and SWR reading, but no amplification from the amplifier.   And if I had any more than 12w of drive power from the K3, the amp would not give me any reading at all. Dropping it back to under 12w, the Pwr/SWR readings would be visible again.
>
> I decided to disconnect the antenna from the KAT 500 altogether and connected straight into the amp. Low and behold, I now have the amp working again!
>
> Hence, the problem is with the KAT500 tuner.  I am thinking that a factory reset would do the trick. Question is, how do you reset a KAT 500 to factory default? The manual states to do it with a computer.  Any buttons I can push on the tuner itself for restoring the factory defaults?
>
> Thanks,
> Ed NI6S
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

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