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 Rick/WA6ES wrote: > I should of said I am on Page 36 of the Alignment and Test Part 1 so I think > that there is no output, I will check the board anyway, you never know. At > first I did find some points not soldered and took care of them. Still > checking and killing brain cells. > Not sure if the display goes blank when you are transmitting or still > displays the frequency that you are on. I was thinking ground or short but > the backlight stayed on. > > Rick/WA6ES > > ______________________________________________________________ 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
