[Elecraft] K3 losing RF power

[Paul Ormandy ZL4PW]

Hi all,

More info...

Was unaware of the power recommendations on 50MHz...

I was running 100W calling CQ on 50MHz when the problem suddenly arose.
Maybe running 100W on 6M has been the cause?

If I dial up 100W on any band, RF power as indicated on the K3 display is
70W.

I am unable to get more than 70W on any band...

And running very latest software 4.22.

Cheers,

Paul


Hi all,
>  
>  My K3 has developed a problem...
>  
>  Power output is down to 70W and the LCD back-light flickers on tx. The

"Low Voltage" message flicked

> >  up briefly once.
> >  
> >  I suspect a DC power problem but so saying, the voltage at the rig is
13.9V on transmit at 70W and

> >  the rig is drawing 13A. The problem seems worse on the 6mb.
> >  
> >  If I reduce the output RF control to around 60W, there is no perceptible
LCD flickering.

> >  
> >  I will obtain another 20A power supply tomorrow and see if the problem
persists.

> >  
> >  In the mean time, (apart from running low power), can anyone suggest what
I should start looking for

> >  internally?
> >  
> >  Kind regards,
> >  Paul
-- 
Paul Ormandy ZL4PW ZM4M
www.radiodx.com
www.zl4pw.orcon.net.nz