[Elecraft] P3 abnormal shut off problem

[Don Wilhelm]

Tom,

If you have not yet made the K3 switch to the 1 amp output, that alone 
could explain the problem, especially if you have the SVGA option in 
your P3.  The 0.5 amp source is marginal in the P3 without any options.

73,
Don W3FPR

On 10/28/2019 11:17 PM, Tom Azlin W7SUA wrote:
> Thanks Don.
> 
> I measured the power supply sag at the power supply to be about 0.05 
> volts. Replaced the cables with larger gauge and still had a problem, 
> perhaps internal to the K3. Switched to feeding the P3 directly from the 
> power supply ( an Astron 70, but switch to Alinco 50 amp with same 
> results) and now the P3 is rock solid. I did order the K3 mod to raise 
> the current limit from 0.5 to 1 amp as suggested by Elecraft. And will 
> be making that Aux DC out to P3 cable of heaver gauge.