[Elecraft] Output power problem

[Ron D'Eau Claire]

Start checking at each part back toward where you do have 13 vdc. Suddenly,
you'll have the bad connection 'bracketed' - no 13 v on one side and 13 v
present on the other side. 

 You may have a badly tinned toroid lead. They can be hard to spot at times
(the lead will look soldered,  but there's actually still a thin layer of
enamel between the wire and the solder in the hole. 

Ron AC7AC

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of JEAN-FRANCOIS MENARD
Sent: Friday, June 25, 2004 11:53 AM
To: elecraft at mailman.qth.net
Subject: [Elecraft] Output power problem


Finally I changed PA transistors Q7 & Q8, because I shorten Q7 between 
Base and Collector by accident with my probe... no big deal...

Now, tuning at 2W I have again these readings:

Both Q7 & Q8

B : 0.6 VDC
C : 0.0 VDC !!! (should be around 13.3 VDC
E : 0.0 VDC

There is also the readings I have with driver Q5 when tuning at 2W

Q5

E : 0.6 VDC
B : 1.2 VDC
C : 13.4 VDC (should be 12.4, but... )

Any idea ???

===============================================
Jean-François Ménard / VA2VYZ
k2 at cima.ca

A