Well Don, I went back checked everything, every hole and every solder fleck. Cleaned up pad solder joints and just verified all, did I mention I missed a couple of holes. Plugged in the power and earbuds and I heard noise, tried the keyer and it was making noise, backwards but dits and dahs. I figure the world would switch to left handed being normal, maybe next year. Anyway now I can say I am off to page 38 and winding that L1. I just have to remember this is my training for making the K2 later this year. With the K2 I will slow it down a notch and read twice before doing anything. Thanks Again Rick/WA6ES
Don Wilhelm-4 wrote: > > Rick, > > The K1 display changes to a simulated bargraph to indicate the power > output when keyed. You will not have any power output at this stage of > assembly, so your statement of a 'blank display' may be just fine. > Since the backlight stays on during keying, I should retract my > statement about a power problem. > > The most likely reason for no sidetone is soldering - check to see if > all points are well soldered and none skipped. You do have the AF Gain > advanced do you not? The K1 sidetone varies with the AF Gain setting. > The source of the sidetone is the output from the DAC on the Front > Panel, U2 pin 1. If you have an oscilloscope, you could check to see if > you have an audio signal there when the K1 is keyed. Lacking a 'scope, > connect a pair of leads to an audio amplifier input (line in of a > computer soundcard or an MP3/CD player) and probe at that point to see > if there is any sound - it might not sound great, but you will know if > the signal is present. > The signal leaves the front panel via J1 pin 5. Look at the schematic > for the RF Board sheet 1 in the lower left corner and you will see the > components that the sidetone signal (XFIL/TONE) are applied to. It > makes it way to the AF Amp through the AF Gain control. You should hear > some 'white noise' sound when the AF Gain is advanced. If the audio is > totally silent, you may have a problem with the AF Amp rather than the > sidetone. > > 73, > Don W3FPR > > >> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > -- View this message in context: http://n2.nabble.com/Building-a-K1-no-side-tone-tp4244892p4246602.html Sent from the [K1] mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
