[Elecraft] K3S Power Creep (again)

[Buck]

I have had the same experience running FT8.

Buck, k4ia
Honor Roll
8BDXCC
EasyWayHamBooks.com

On 3/13/2018 5:46 PM, ab2tc wrote:
> Hi all,
> 
> I have the same problem. Anytime I change something, like band, power or a
> number of other things, power starts up ridiculously low and creeps *very*
> slowly up to the 100W mark. Even without changing anything the actual peak
> power on a transmission can be anywhere between 80 and 120W as indicated by
> my LP-100A. I am not sure if this is a problem with K3S only. I still have
> my old K3 but don't use it often enough to know if this is a K3S problem
> only. I understand Elecraft's policy on not relying on a fast ALC to to
> control power like most of the big three do (causing IMD), but really, does
> it have to be this slow? This is on a fairly new K3S which has been back to
> the factory twice to get the latest upgrades to the transmitter chain. My
> experience is all SSB with 100W set for the power level.
> 
> AB2TC - Knut
> 
> 
> 
> Wes Stewart-2 wrote
>> This is an old subject but with a new wrinkle.  Although I'm observing a
>> drift
>> in power on all bands (and modes) after a band or power adjustment, it's
>> ridiculously slow on 17-meters.  It's taking 5-10 seconds to stabilize.
>>
>> Any change, such as switching to another band and back again or a minor
>> change
>> in power starts the process over.  This is particularly annoying on RTTY
>> AFSK
>> A.  (Please no lectures on how Elecraft ALC is different from other
>> radios, I've
>> been running AFSK RTTY for 10 years with K3s.)  Using the KPA500 power
>> graph as
>> an expanded proxy for the K3S output power, I'm seeing a change from about
>> 50
>> watts to 500 watts after an adjustment. On CW the first dit is about 100W.
>>
>> I reran the power calibration and this appeared to fix it initially but
>> the
>> issue returned.  This was particularly annoying when I was running a
>> digital
>> mode and saw that I was hitting the amp harder than desired.  I tried
>> adjusting
>> power during the transmission and it practically dropped to zero before
>> slowly
>> climbing.  Getting a precise level is difficult.
>>
>> Wes  N7WS
>>
>>
>>
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