[Elecraft] Slowed RS-232 with P3 installed

[The Smiths]

If you did turn off the P3 first, make sure that the SUB is turned off too.  I've seen this keep things from loading successfully as well.
 
> From: bruce.beford at myfairpoint.net
> To: elecraft at mailman.qth.net
> Date: Sun, 15 Aug 2010 17:30:39 -0400
> Subject: Re: [Elecraft] Slowed RS-232 with P3 installed
> 
> Johnw, N6AX wrote:
> 
> > I experienced my very first vapor-lock (MCU LD freeze-up) when doing the 
> > V4.05 download with the P3 connected in the RS-232 path......have done 
> > many, many firmware updates since receiving my K3 (S.N 567) with no 
> > glitches at all.......is this a coincidence?
> 
> 
> Did you remember to turn the P3 off BEFORE uploading new firmware to the K3?
> 
> Bruce, N1RX
> 
> 
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