[Elecraft] K3/KPA500/KAT500 SWR problem

[Jim Bennett]

Dick - 

I've had my K-line (K3/P3/KPA500/KAT500) running here for a while on almost all the bands, mostly CW. I have yet to have it act up this way, or any other way, for that matter. I use an 88 foot long doublet at 45 feet for 40-6 meters, and two separate Inverted L antennas for 80 and 160. Single 6 foot long copper clad steel ground rod right outside the shack window.

Jim / W6JHB

On   Monday, Dec 30, 2013, at  Monday, 10:15 AM, Richard Solomon wrote:

> OK, so now we have heard from a few folks that have this problem.
> 
> As a soon to be purchaser of a similar set-up, I am quite concerned.
> What is the solution to this problem ?
> 
> I read one post about putting the Tuner in Manual mode, but I also
> read that another user has had the problem in Manual mode.
> 
> How does one fix this ?
> 
> 73 es HNY, Dick, W1KSZ
> 
> 
> On 12/30/2013 11:10 AM, Joe K2UF wrote:
>> I have had a similar thing happen to me also.  I have been in a contest on a
>> run freq. and suddenly the KPA500/KAT500 will fault.  This is on CW.  If I
>> do a 'tune' the amp/tuner will retune and I can continue.  Of course in the
>> few seconds it takes I will usually lose the freq.
>> 
>> 73,  Joe K2UF
>> 
>> -----Original Message-----
>> From: elecraft-bounces at mailman.qth.net
>> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of KD0Q-Glenn
>> Sent: Monday, December 30, 2013 9:24 AM
>> To: elecraft at mailman.qth.net
>> Subject: Re: [Elecraft] K3/KPA500/KAT500 SWR problem
>> 
>> I experience this as well, only on 80 meters with the KPA500 in
>> operate.  Always thought that it was RF getting into the KAT500 sensing
>> as I can usually back off to 300 Watts, force a KAT500 re-tune and continue.
>> 
>> Glenn - KD0Q
>> 
>> On 12/30/2013 07:59, Bill W2BLC wrote:
>>> This is exactly why I want to see this complete discussion in full
>>> view. It is a problem here also - occurring often and without any
>>> obvious cause. Putting the tuner in AUTO or in MANUAL does not stop it
>>> from happening. The tuner does not seem to understand the term MANUAL.
>>> 
>>> My experience is from 75 meters - with no change in antennas - and
>>> will occur on oft used frequencies in the middle of a transmission.
>>> The tuner just suddenly decides it is time to make noises. I do not
>>> use other bands and the antenna is a dipole that present no problems
>>> to other rigs and tuners (read as nothing wrong with the antenna or
>>> feedlines, which have all been completely checked).
>>> 
>>> AT the very least, I now know I am not alone with this problem.
>>> 
>>> Thanks,
>>> 
>>> Bill W2BLC  K-Line
>>> 
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>> 
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> 
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