[Elecraft] K3 power output on SSB

Fri Apr 2 19:44:34 EDT 2010

Joe
Tuner works just fine everything is just like a 100 / 200 watt Yaesu is 
driving the VL-1000 my Quadra
is over ten years old and was built when Yaesu had the company it is the 
second version
I want to say of the original released.

I use the K3 [TUNE] button for tuning the tuner and band changing, I do 
not change the power level.
  I put the amp out put into a dummy load then use the [F-set] button  
and  [TUNE] on the K3
the amp will change bands using this method with anything over 50 watts 
or so. One of these
days I will do up a band data cable for the band selection of the 
Quadra. The Quadra has worked
flawless from day one.The switching power supply has been on all these 
years with out a hitch. I hear the
maintenance feature exercising the relays in the middle of the night 
regularly.

Regards
Art
ka9zap

On 4/2/2010 6:08 PM, Joe Subich, W4TV wrote:
> Art,
>
>    
>> My work around is to not connect the radios ALC then engage the
>> input attenuator on the amp that limits the drive input to 100
>> watts the amp and the K3  has been doing just fine since the
>> born on date June 13 09, so I have forgotten about this issue
>> all together.
>>      
> Do you have enough drive to operate the tuner with the attenuator
> on or have you tried it in that configuration?
>
> I have a pair of Quadras waiting to be mated with my pair of K3s
> once I get done with some antenna work and shack cleaning.
>
> 73,
>
>     ... Joe, W4TV
>
>
>
>
>    
>> -----Original Message-----
>> From: elecraft-bounces at mailman.qth.net
>> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Arthur
>> Nienhouse
>> Sent: Friday, April 02, 2010 6:05 PM
>> To: Elecraft post
>> Subject: Re: [Elecraft] K3 power output on SSB
>>
>>
>> I have a similar issue  with my K3 VL-1000 combination the
>> amp would key
>> up full power then fold back slowly until it was running
>> about 1/2 output. No amount of reducing the mic or power
>> settings changed this behavior
>> and still have the right output. Even setting drive for lower
>> amp output it still marched backwards something is triggering
>> a fold back when it
>> is not required to. I do not see any spike on key up so I
>> don't think it
>> is a
>> key up timing issue.
>>
>> My work around is to not connect the radios ALC then engage the input
>> attenuator on the amp that limits the drive input to 100
>> watts the amp
>> and the K3  has been doing just fine since the born on date
>> June 13 09,
>> so I have forgotten about this issue all together.
>> I don't use the VL-1000 all the time but when I do it works seamless
>> with no ALC related problems at all.
>>
>> My K3 serial #3142 has the latest up date I can't remember if
>> this issue
>> was there from the first time I used the amp with the ALC
>> connected or if it was something that started with a later
>> update in firmware, I think
>> it was ok at first because I was surprised when the issue
>> first showed up.
>>
>> Regards
>> Art
>> ka9zap
>>
>>
>> On 4/2/2010 2:36 PM, Bruce McLaughlin wrote:
>>      
>>> Don:
>>>
>>> For what it may be worth, I was in contact with Don, N4ZZ,
>>>        
>> the other
>>      
>>> day and he was complaining about a momentary, periodic drop
>>>        
>> in power
>>      
>>> output from the K-3 of approximately 50% while driving his
>>>        
>> amplifier.
>>      
>>> He was using the latest firmware version 3.79.  He had not had that
>>> problem before.  I had downloaded version 3.79 but have held off
>>> installing it until we see whether there is in fact a
>>>        
>> problem.  I am
>>      
>>> using version 3.77 and the output is quite stable as it has
>>>        
>> been all
>>      
>>> along.  I think I should mention I have seen one or two other
>>> references regarding similar problems from other posting as well.
>>> Although Don's problem is not exactly the same as Tom's it does
>>> mention unstable power output on sideband.  Perhaps this warrants
>>> further investigation.
>>>
>>> Bruce-W8FU
>>>
>>> -----Original Message-----
>>> From: elecraft-bounces at mailman.qth.net
>>> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Don Wilhelm
>>> Sent: Tuesday, March 30, 2010 8:34 AM
>>> To: Juha - oh6os
>>> Cc: elecraft at mailman.qth.net
>>> Subject: Re: [Elecraft] K3 power output on SSB
>>>
>>> Juha,
>>>
>>> Tuning within any band will not reset the power output controls,
>>> however changing bands does reset it.
>>>
>>> As Joe has mentioned, do the power calibration, it will help.  The
>>> power control mechanism does use the data obtained from the TX gain
>>> calibration, so yes they are related.
>>>
>>> 73,
>>> Don W3FPR
>>>
>>> Juha - oh6os wrote:
>>>
>>>        
>>>> Not so good behavior on the contest, where is alltime tuning.
>>>>
>>>> juha - oh6os
>>>>
>>>>
>>>>
>>>>
>>>>          
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