[Elecraft] KAT500 drops out during voice peaks

[Lyn Norstad]

I had a similar problem a couple years ago.  It turned out to be a lightning arrestor device on the 600 ohm OWL that was arcing over.  I replaced it with a higher capacity unit, and the problem disappeared.

73
Lyn, W0LEN

-----Original Message-----
From: elecraft-bounces at mailman.qth.net [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of hawley, charles j jr
Sent: Thursday, February 03, 2022 10:44 PM
To: Jack Brindle
Cc: Elecraft at mailman.qth.net
Subject: Re: [Elecraft] KAT500 drops out during voice peaks

No, it’s always been on manual since I got it. And it never used to do this. Nothing is changed in the shack except in using a 4:1 balun instead of a 1:1. The timing is similar.
Tomorrow I’ll reinstall that and see if it persists.
An arc outside is a thought too. I will check my open wire feed line as well.
Thanks for the replies.

Jack BMW Motorcycles
BMWMOA &RA #224
Chuck KE9UW 

Sent from my iPhone 

> On Feb 3, 2022, at 8:49 PM, Jack Brindle <jackbrindle at me.com> wrote:
> 
> It sounds like you may have the KAT500 set for AUTO. Change it to MAN and it should perform much better.
> 
> The rapid signal changes associated with SSB operation can cause issues with the sampling of the power in the directional coupler,
> causing readings that make the KAT think it needs to do a tune. By using MAN mode you get to decide when a tune is needed,
> making everyone much happier.
> 
> 73,
> Jack, W6FB
> 
> 
>> On Feb 3, 2022, at 6:20 PM, hawley, charles j jr <c-hawley at illinois.edu> wrote:
>> 
>> I've been having my tuner go to high swr a random voice peak.
>> The utility shows the right settings after a drop out but the Amp Key Interrupt box is checked.
>> And the swr showing on the LEDs is high.
>> Not sure what is going on.
>> I get it back to operating at low swr by doing a tune.
>> 
>> ​Chuck Hawley
>> c-hawley at illinois.edu
>> 
>> Amateur Radio, KE9UW
>> aka Jack, BMW Motorcycles
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