Don, Thanks for the help, I'll do them tonight when I get home. Given that there are 4 trimmers per band, is there any specific sequence that I follow to adjust them?
73, Denny - KI3F Begin forwarded message: > From: Don Wilhelm <[email protected]> > Date: March 1, 2012 8:36:49 AM EST > To: Dennis Rayfield <[email protected]> > Cc: Elecraft email list <[email protected]> > Subject: Re: [Elecraft] K1 Transmitter problem > Reply-To: [email protected] > > Denny, > > Adjust the trimmers for maximum power. If the power goes above 5 watts, > bring it down by repeatably tapping the WPM- button or exit TUNE and set the > OUT menu to a lower value. > > Remember that you are adjusting for a peak - and if the power output goes too > high, you will not be able to see the peak of the tuning because the > transistors have reached their peak capability. That is why you need to keep > the power low while tuning. > > 73, > Don W3FPR > > On 3/1/2012 6:47 AM, Dennis Rayfield wrote: >> OK, I assumed that tweaking the trimmers on the filter board would just move >> the power out small bits. such as if you have the power out set at P2.0, >> the trimmers would tune between P1.7 and maybe P2.3. I want in and starting >> adjusting them, and I get power out now in the right ranges, and fact I can >> trim them for much higher than what I set the power for. I'll go back and >> read the ALC stuff tonight, and make sure I understand it. >> >> Should I adjust the trimmers for max output, or to what I set the power out >> to be with the menu? >> >> 73, >> >> Denny - KI3F >> >> >> >> On Mar 1, 2012, at 6:12 AM, Dennis Rayfield<[email protected]> wrote: >> >>> Don, >>> >>> Thanks for your questions and helping me work through this. The RF >>> voltages I'm seeing are (on 30 M) are: >>> >>> PRE - .068 >>> ATTN - .023 >>> OSC - .014 >>> MIX - .105 >>> BUF - 1.37 >>> TR1 - .62 >>> BPF - .076 >>> >>> The DC voltages on page 46 were all within the ranges indicated. >>> >>> The output power in tune show P0.1 on all bands except 15M, there it moves >>> up to P0.3 and stops there. I'll check the RF voltages at all points on >>> all bands tonight after work... >>> >>> 73, >>> >>> Denny >>> >>> >>> >>> On Feb 29, 2012, at 10:17 PM, Don Wilhelm<[email protected]> wrote: >>> >>>> Denny, >>>> >>>> Tell us more - what band, and what >>>> rf voltage are you reading at the Transmit mixer output (pin 4) How >>>> about th DC voltages? >>>> >>>> 73. >>>> Don W3FPR >>>> >>>> On 2/29/2012 10:04 PM, Dennis Rayfield wrote: >>>>> I've build an RF Probe, and worked through the transmitter signal tracing >>>>> section. All of the voltages are within range until I get to the >>>>> band-pass filter. I'm just reading .07 volts rather than the 0.5-1.0 >>>>> that it should read. I have the 4 band module (40, 30, 20, 15) and the >>>>> relays click when I change the bands. >>>>> >>>>> Thanks for any help. >>>>> >>>>> 73, >>>>> >>>>> Denny - KI3F >>>>> >>>>> >>>>> >>>>> On Feb 28, 2012, at 10:12 PM, Don Wilhelm<[email protected]> wrote: >>>>> >>>>>> Dennis, >>>>>> >>>>>> It sounds like you need to turn the manual to the Transmit Signal >>>>>> Tracing section in the back of the manual. >>>>>> Once you isolate the failure to a specific stage, we can help you >>>>>> isolate to the component level. >>>>>> Right now, all we can say is that there is a problem somewhere in the >>>>>> transmit path. >>>>>> You might want to check for soldering problems, unsoldered components or >>>>>> those where the solder did not flow out adequately onto both the >>>>>> component lead and the thru-plated hole. Re-flow the soldering with a >>>>>> hot soldering iron - 750 degF if you used leaded solder, 800 degF if you >>>>>> used unleaded solder. >>>>>> >>>>>> 73, >>>>>> Don W3FPR >>>>>> >>>>>> On 2/28/2012 9:58 PM, Dennis Rayfield wrote: >>>>>>> I'm building a K1 and have everything finished and am at the stage for >>>>>>> transmitter alignment and test. I use the out menu to set the output >>>>>>> to 3 watts, but when I put it into tune mode it immediately shows P0.1 >>>>>>> on the display and there is no power out. When I take it out of tune >>>>>>> and go back to the out menu, that still shows 3 watts. >>>>>>> >>>>>>> Any suggestions where I should start with this? >>>>>>> >>>>>>> Thanks for any suggestions. >>>>>>> >>>>>>> >>>>> ______________________________________________________________ >>>>> 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 >>>>> >>>> ______________________________________________________________ >>>> 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 >> ______________________________________________________________ >> 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 >> ______________________________________________________________ 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
