Hi Don thanks for answer. I checked diodes D3, D4, D5 and are correctly installed. I make some test after the check for supply you more informations. I turn on the K2 on SSB, I push the PTT, speak into microphone and I have : power output OK, the s-meter follows the voice but the current increase and arrived at Hi Cur limit (also without speak into the microphone). Push the PTT is sufficient for have a current absorbed but the wattmeter dont show any power out. I hope that these additional information are sufficient to comprise the cause of this problem.
Thanks for your help '73 de IZ1DUG Fabio ---------- Initial Header ----------- >From : "Don Wilhelm" [EMAIL PROTECTED] To : "[EMAIL PROTECTED]" [EMAIL PROTECTED] Cc : "elecraft" elecraft@mailman.qth.net Date : Sat, 28 Jul 2007 08:17:10 -0400 Subject : Re: [Elecraft] K2 SSB Problem > Fabio, > > I cannot be specific, but the most probable area causing that trouble is > the area of Q2 and Q3 (those direct the BFO signal either to the > balanced modulator in SSB mode or back to the RF board for CW) or the > balanced modulator U5. > > Check carefully to be certain diodes D5, D4 and D3 are inserted in the > proper direction and in the correct holes. > > 73, > Don W3FPR > > [EMAIL PROTECTED] wrote: > > Hi, > > > > I just finished installing the KSB2 module on my K2 QRP version (full > > optional). I go to operate for the first time but when I push the PTT I > > get this problem: the current absorbed increases (the voltage decrease) > > until it exceeds the value 4 A (set at this value after some test) and the > > K2 switch off. The current and the voltage values reading on the K2 > > display and on the multimeter are the same. I have this problem on all band > > but only in SSB mode (K2 works correctly on CW mode with full power > > 10-13W). The problem is repeated every time when I push the PTT. > > I use the microphone Heil MH-2. > > Any suggestions? > > > > Good weekend > > > > Ciao, > > > > IZ1DUG, Fabio > > > > K2/QRP #1702 and K2/100 #5909 > ------------------------------------------------------ Scegli infostrada: ADSL gratis per tutta lestate e telefoni senza canone Telecom http://click.libero.it/infostrada _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
