Re: [Elecraft] K1 test signal generator oscillator
Perhaps the 5 MHz rock is a third overtone cut. My experience, I've never been successful in getting a third overtone cut to oscillate on the fundamental frequency. 73 Bob, K4TAX On 2/11/2016 9:38 AM, zabarnick . wrote: I recently built the small test oscillator circuit shown in the K1 manual. Using a 5 MHz crystal, my circuit built on a breadboard oscillates on the third overtone at 15 MHz, rather than the fundamental. Any suggestions as to why and how to modify the circuit to oscillate on the crystal's fundamental frequency? Steve N9SZ __ 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 Message delivered to rmcg...@blomand.net __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] K1 test signal generator oscillator
I recently built the small test oscillator circuit shown in the K1 manual. Using a 5 MHz crystal, my circuit built on a breadboard oscillates on the third overtone at 15 MHz, rather than the fundamental. Any suggestions as to why and how to modify the circuit to oscillate on the crystal's fundamental frequency? Steve N9SZ __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K1 test problem
I have no direct experience with the K1, but the first think I would look for is the diodes installed backward. The band will be on the output (negative) end of the diode. The next thing to look for is that all the diodes are open. Willis 'Cookie' Cooke, TDXS DX Chairman K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart On Sunday, May 4, 2014 12:02 PM, Leroy Bellefeuille wrote: I am a first time "K1" builder and am having a very difficult time getting the proper voltage measurements for the test on page 46 of the manual. Test point J7 pin 8 should be 3.8vdc I get "0" The test points on Diodes "D9","D10","D11","D13", all measure "0" Any suggestions as to how to go about troubleshooting these problems? I have had no problems up to this point, but this has me stumped. __ 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 Message delivered to wrco...@yahoo.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K1 test problem
> I am a first time "K1" builder and am having a very difficult > time getting the proper voltage measurements for the test on > page 46 of the manual. > Test point J7 pin 8 should be 3.8vdc I get "0" > The test points on Diodes "D9","D10","D11","D13", all measure "0" Are you sure you performed this step correctly, just before taking the voltage readings: "Place the transmitter in TUNE mode (key-down), by holding the W P M + and W P M - switches simultaneously." Mike / KK5F __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K1 test problem
You have no voltage coming into the T/R switch from the 6T voltage rail. Do you have the 6T voltage anywhere? Do a TUNE and check the voltage at P1 pin 7 - it should be near 6 volts. If OK there, you can go on, but if nothing there, you will have to backtrack to the Front Panel Board - the voltage comes from the MCU FP U1 pin 7 - check to see if there is voltage there. If you did have 6 volts at P1 pin 7, all is good on the Front Panel, so go on to the RF Board. Check the ends of R38. If you have voltage at one end, but not the other, check the R38 soldering. R38 OK, then go on to check RFC3 - same thing, check for voltage at both ends - check soldering if you have voltage at only one end. If soldering is OK, check the resistance of RFC3 - it should be quite low. If RFC3 is fine and has voltage at both ends, check the orientation and soldering of the diodes, particularly D9. 73, Don W3FPR On 5/4/2014 1:01 PM, Leroy Bellefeuille wrote: I am a first time "K1" builder and am having a very difficult time getting the proper voltage measurements for the test on page 46 of the manual. Test point J7 pin 8 should be 3.8vdc I get "0" The test points on Diodes "D9","D10","D11","D13", all measure "0" Any suggestions as to how to go about troubleshooting these problems? I have had no problems up to this point, but this has me stumped. __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] K1 test problem
I am a first time "K1" builder and am having a very difficult time getting the proper voltage measurements for the test on page 46 of the manual. Test point J7 pin 8 should be 3.8vdc I get "0" The test points on Diodes "D9","D10","D11","D13", all measure "0" Any suggestions as to how to go about troubleshooting these problems? I have had no problems up to this point, but this has me stumped. __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] K1 test
Test...my posts are not making it through. Greg Doughty __ 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
Re: [Elecraft] K1 test supplies
Greg, Other than your DMM and dummy load, you will not need anything else if all goes well. A comment on your "multimeter" -- if that is an older analog type, you should replace it with a DMM (digital type) because the analog type uses a high voltage for measuring resistance and will turn active devices into conduction and give you erroneous readings. Even an inexpensive DMM like the type that go on sale for less than $10 at places like Harbor Freight will work just fine. The signal generator (I assume the XG2) can be used for making MDS measurements and setting the S-meter response. If you run into trouble, you may need a stronger signal source on each of the K1 bands covered - another transmitter operating into a dummy load will do for that task. If you have trouble with the transmit section, you will need an RF Probe to do Transmit Signal Tracing. 73, Don W3FPR ki4...@cox.net wrote: > So I get my K1 today, and would like to know what, if any test gear I > need. I have a multimeter, and I am putting together the mini modules > dummy load and signal generator. I would like to get the spectrograph > software for my touch, but I guess that is where I need suggestions. > Thanks and happy building. > > Greg Doughty > KI4BBL > __ > 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 > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.800 / Virus Database: 271.1.1/2796 - Release Date: 04/07/10 > 02:32:00 > > __ 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
[Elecraft] K1 test supplies
So I get my K1 today, and would like to know what, if any test gear I need. I have a multimeter, and I am putting together the mini modules dummy load and signal generator. I would like to get the spectrograph software for my touch, but I guess that is where I need suggestions. Thanks and happy building. Greg Doughty KI4BBL __ 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
