[Elecraft] Slowed RS-232 with P3 installed

[Bruce Beford]

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