[Elecraft] RS232 failure

[Viggo Magnus Nilsen]

Hello Elecraft Owners. 

I have  earlyer som failure with the RS232 port on my old K3 with KIO3
board. 

The K3/0- mini runs in TERM mode when the K3 is ''cold'', in room temp
it works ok. 

At U1,, pin 8 the voltage runs from +0.4vdc to - 2.4 vdc in approx 5
minutes. 

REPLACED THE Q1 WITH MMBT5088LT1G  (sot 23)  from Mouser. 

Now the voltage on U1 pin8   -6.88 vdc, and the K3/0-mini  play ok so
far. 

The K3 in test is installed '' outside'' for the coming nite, just to
see what happen . 

Hope this can be an idea if you have same trbl with the RS232
port........ 

( Good help from Keith at Elecraft tech) 

73' Viggo  LA9NEA