[Elecraft] K3 - 2.73/1.98 Clicks on Power On

[Stewart Baker]

That should take care of it....

T.I.A.

73
Stewart G3RXQ
On Fri, 12 Dec 2008 12:47:29 -0800, Eric Swartz - WA6HHQ, Elecraft 
wrote:
> Hi Mike,
>
> It is. This is something that doesn't show up all the time so we 
were
> not aware of it until it was noted here on the list recently.
>
> We're adding an additional power on mute time delay to the 
firmware
> right now.
>
> 73, Eric
>
> Mike Scott wrote:
>> The power on rush of noise is almost earsplitting here in 
headset and
>> external speakers, K3 serial 509. It lasts for about a quarter 
of a second.
>> If I had the volume turned up it could cause damage to a 
speaker or my ears,
>> it is that loud. For this reason alone it should be a high 
priority fix.
>> Perhaps just blank the receiver in the turn on sequence for 
enough time to
>> cover the transient.
>>
>> It has existed over the last several firmware updates. I notice 
that it is
>> worse when the bandwidth is set wider such as 2.7 KHz SSB mode. 
It does not
>> matter if a signal is present or not. I have high background 
noise level
>> here (S-7) so I expect that might be equivalent to having a 
signal present.
>>
>> When set for CW at 400 Hz the momentary noise is there but 
much-much subdued
>> and not objectionable at all so CW operators may not notice the 
effect. The
>> effect is there in SSB/Data/CW modes. I don't hear it in 
AM/13KHz.
>>
>>
>> Mike Scott - AE6WA
>> Tarzana, CA (DM04 / near LA)
>> K3-100 #508/ KX1  #1311
>>
>>
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