Bob, I can't give you a measurement number right away, I do not have a working KX1 here at the moment, but that value may be possible tomorrow or Friday. If you do not hear quite a loud signal with the 50 uV output from the XG2 (or XG1 with a 20 meter crystal) - with the RF Gain at full clockwise and the AF Gain between 25 and 35% of rotation, then there is something wrong.
How is the transmit power output? If that is OK, then the low pass filter is likely OK, and you might want to look at T2. The KX1 audio is not super strong, and having good volume does depend on using sensitive headphones. If your headphones do not have an sensitivity rating greater than 108 dB/mW, then your headphones may be the major problem, see the KX1 manual page 62. 73, Don W3FPR Bob Jones wrote: > I've just completed a KX1 build with the 80/30m option and auto atu. > > It works on all bands but 30m and 20m require the volume control to be fully > clockwise and even then it's quiet. I've carried out the recommended checks > and everything appears to be fine. > > Having read the previous posts on 'low audio' there's an element of > subjectivity regarding what this means. > > Does anyone know of a definitive measurement I can make to see if this radio > is working as well as it should? > > For example, I have the XG1 and can inject a 14.060 MHz signal at 1 microvolt > or 50 microvolts. With the bandwidth set to maximum, what level of signal > should I expect on the input or output of the audio amplifier, or at any > other point in the circuit? > > Any advice gratefully received. > > Bob, G3YIQ > > > > > ______________________________________________________________ > 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 > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.0.238 / Virus Database: 270.11.18/2009 - Release Date: 03/18/09 > 07:17:00 > > ______________________________________________________________ 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
