Just providing some information that may help others that have experienced RF slow ramp up to full power when driving Tx audio from a soundcard (typ DATA-A application). I
I had comments back at the time I asked for solutions to check for low audio level. But it was the opposite, in fact! I am using an external emu0202 soundcard (I/F to computer vis USB2.0) which has plenty of level controls for a sound input but none for output via the stereo phone jacks. Going into the operating sw for the soundcard reveals no adjustment of the output audio (usually called playback). I found reference to making adjustments as part of installation of the sw - but none after installation - huh? Well not wanting to go thru all the process of un-installing then re-installinng I looked for an alternative. There was one starring me in the face on the front panel. There is a headphone jack with level control (volume) as part of the on-off control. I unplugged my Tx audio line from the jack at the rear and into the headphone jack and adjusted the TX audio to 4-bar with 5th flickering. I could not accomplish this using the mic level control on the K3 (which doubles as line-in level). Setting the mic=0 results in no audio; setting the mic=1 and it was overloading the K3. The soundcard output was just too hot. Using the headphone jack with headphone level control lets me set it just right. Result. First time I sent test tones form the sw the K3 went thru the gradual RF ramp up. Next time I tried it K3 immediately went to full power with no ramp up...problem solved! 73, Ed - KL7UW, WD2XSH/45 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-? DUBUS Magazine USA Rep [email protected] "Kits made by KL7UW" http://www.kl7uw.com/kits.htm ====================================== ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
