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: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of JEAN-FRANCOIS MENARD Sent: Friday, June 25, 2004 11:53 AM To: [email protected] 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 [EMAIL PROTECTED] A _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
