[Elecraft] Shutdown on 50MHz CW

[Bill Coleman N2BC]

Similar symptoms here, K3/100 #929 /w 1.96MCU, KAT3.

It never shuts down though and no high SWR warning.  Indicated PA temp jumps 
about 6C at
key down,  I noticed two unexpected relay transfers during one test.

Testing into a Bird 500W dummy load at 100W, a mix of CW and solid key down 
until reaching appx 60C PA temp.
FWIW my power source is a 50A Astron.

I disabled the KAT for the next two tests and did not notice any relay 
transfers.  Tried it a 4th time with the KAT enabled & again no relay 
transfers.

Only symptom here is the apparent RF getting into the PA temp sensing.

73, Bill  N2BC

----- Original Message ----- 
From: "Bruce Osterberg" <n9bx at mchsi.com>
To: "Ian White GM3SEK" <gm3sek at ifwtech.co.uk>
Cc: <elecraft at mailman.qth.net>
Sent: Monday, May 26, 2008 5:37 PM
Subject: Re: [Elecraft] Shutdown on 50MHz CW


> Good Evening:
>
> The exact same thing happens to me also.  All of a sudden I get a High SWR 
> reading but their is none and it happens on 6 meters only.  BTW I am in 
> Bypass Mode as SWR is 1:1
>
> Bruce N9BX 73
> K3 775
>
> PS Which menu command lets you key the rig when in USB for CW without 
> switching to that Mode?
>
>
> Ian White GM3SEK wrote:
>> Paul G4LNA wrote:
>>>
>>> My first reaction is it sounds like RF getting in somewhere, as a matter 
>>> of interest does it happen when you run it into a dummy load?
>>>
>> Yes, with antenna or dummy load, on either port of the KAT3, and with or 
>> without the auto-ATU in line.
>>
>>