Jeremy and List; (See below) My guess on power variations would be: 1. Core/winding variations in the RF PA output inductors and capacitors 2. Variations in the DDS lowpass filter inductors/caps 3. Variations in freq response of Q4, Q5 or Q6 4. Bad Q6
Jay W6CJ -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jeremy Cowgar Sent: Thursday, August 04, 2005 8:20 AM To: [email protected] Subject: Re: [Elecraft] KX1 #01221 Alive but shy of stated power? Why the difference, they are all the same rig why would it change from rig to rig? Jeremy KB8LFA Coote, Jay wrote: >Jeremy and List; >Your KX-1 turned out better than mine. My 10 MHz band is weak and >noisy on receive plus I had the following transmitter problems: >I had 4 watts/7MHz and 10 MHz, 2.6 watts/14 MHz at 13.8V; 1.4 >watts/7MHz and 0.8 watts/14 MHz at 9.0V. >I've tried the changes in R11 and R30 to increase power output, however >this just increases power and does nothing for my 14 MHz power roll-off. >Mine obviously does not meet spec and it is good to have suggestions on >what to try next from Elecraft. I've heard of people getting 4 watts >or more, nearly flat across all three bands. That power rise on 14 MHz >at 9V does sound odd... I would have guessed it to be around 1 watt. >Is your power supply at 9V delivering enough current or is there a >voltage >drop- possibly preventing a relay from opening/closing and changing the >specs of the RF filters on the PA?... A guess. > > _______________________________________________ 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
