[Elecraft] K2 Original problem of High Current and Low Power

[Jimithy66]

Other problems discovered along the way with this partially
assembled kit.

Hi Don,

Thank you so much for sticking with me on this.

K2  #2438 Ver. A with no updates.

I had measured 1.48V at bases of Q7 and Q8. (installed.)

And as you suggested I removed the PA transistors

and now measure 0.63 at base terminals with PAs out.

I don't know how you figured that it was PA Q7 and Q8

that were bad Don but you were spot on !

It looks like the PA bias circuit is working but would

like your opinion.

The table in the manual for Q13 says:

E = 0.6V

B= 1.3V

C= 7.5V (With PA transistors in)


My voltages are :

E= 0.63

B= 1.2

C= 8.17 (With PA transistors out)


Think I should go ahead and put the new PA

transistors in leaving the old bias transistors

Q11 and 13 in place ?

Thanks

73,

Jim / W1FMR

PS... The 8T transmit voltage is 8.19v.