Re: [Elecraft] K3 drive level for Q5 Signal 432 Transverter
Thanks Ed! Don’t know how this chain got so scrambled. I’ll run it be Elecraft too! 73, David, NS4V David R. Hourdequin, PE Specialty Heavy Timber Engineer Hayesville, NC 28904 828-421-6216 > On Mar 2, 2022, at 02:03, Ed Cole wrote: > > Tried what you suggested Gary. No joy. The upper limit with the PWR knob > remains at 0.8MW. I can adjust downward but not upward. Need to get a good > power meter on it and see what the actual output is. And, I?ll try the > low-level power calibration process and see what happens. > > Thanks again. > > Any others have any suggestions? > > David, NS4V > > For accurate measurement of power at 1mw, the HP-432A Power Meter is > excellent. But probably Tried what you suggested Gary. No joy. The upper > limit with the PWR knob remains at 0.8MW. I can adjust downward but not > upward. Need to get a good power meter on it and see what the actual output > is. And, I?ll try the low-level power calibration process and see what > happens. > > Thanks again. > > Any others have any suggestions? > > David, NS4V > -- > For measuring mw level RF, the HP-432A Microwave Power Meter is excellent and > reads up to 10-GHz, which probably not needed by most who read this > reflector. They sell used at about $150, but the power sensor and cord are > hardest to find. > > For most reading RF voltage across a 50-ohm dummy load with an oscilloscope > is good. Read the peak voltage and calculate the rms voltage. Vrms = > 0.7071*Vpk. Power = Vrms^2/50. Scope needs to be rated for the frequency > being measured. > > One other note: I have found my K3 will drop power if the load is not low > SWR. Could the input impedance of the Q5 not be 50-ohms? > > I assume the input is similar to the DEMI 432 transverter with a choice of > high power (up to 10w) or low power (down to -20mw). There is a mini-pot for > adjusting Tx drive on the pcb. The Q5 manual should have installation and > tune-up instructions that mention input power requirements and drive > adjustment. > > Probably a call to Elecraft Service might help. > > 73, ED - KL7UW > __ > 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 d...@dremy.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] K3 drive level for Q5 Signal 432 Transverter
Tried what you suggested Gary. No joy. The upper limit with the PWR knob remains at 0.8MW. I can adjust downward but not upward. Need to get a good power meter on it and see what the actual output is. And, I?ll try the low-level power calibration process and see what happens. Thanks again. Any others have any suggestions? David, NS4V For accurate measurement of power at 1mw, the HP-432A Power Meter is excellent. But probably Tried what you suggested Gary. No joy. The upper limit with the PWR knob remains at 0.8MW. I can adjust downward but not upward. Need to get a good power meter on it and see what the actual output is. And, I?ll try the low-level power calibration process and see what happens. Thanks again. Any others have any suggestions? David, NS4V -- For measuring mw level RF, the HP-432A Microwave Power Meter is excellent and reads up to 10-GHz, which probably not needed by most who read this reflector. They sell used at about $150, but the power sensor and cord are hardest to find. For most reading RF voltage across a 50-ohm dummy load with an oscilloscope is good. Read the peak voltage and calculate the rms voltage. Vrms = 0.7071*Vpk. Power = Vrms^2/50. Scope needs to be rated for the frequency being measured. One other note: I have found my K3 will drop power if the load is not low SWR. Could the input impedance of the Q5 not be 50-ohms? I assume the input is similar to the DEMI 432 transverter with a choice of high power (up to 10w) or low power (down to -20mw). There is a mini-pot for adjusting Tx drive on the pcb. The Q5 manual should have installation and tune-up instructions that mention input power requirements and drive adjustment. Probably a call to Elecraft Service might help. 73, ED - KL7UW __ 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] K3 drive level for Q5 Signal 432 Transverter
Thank you Ben! David R. Hourdequin, PE Specialty Heavy Timber Engineer 828-421-6216 > On Feb 27, 2022, at 19:39, w4sc wrote: > > > Reference pp 49 of the K3 manul. Procedure to calibrate the “LP XVERTER > WATTMETER” is presenter there. The “Power Meter” for the LP port is not a > power meter in the general sense…. You will need a scope or meter capable of > accurately measuring RF at the desired frequency.. > de Ben W4SC. > > Sent from Mail for Windows > __ 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] K3 drive level for Q5 Signal 432 Transverter
Reference pp 49 of the K3 manul. Procedure to calibrate the “LP XVERTER WATTMETER” is presenter there. The “Power Meter” for the LP port is not a power meter in the general sense…. You will need a scope or meter capable of accurately measuring RF at the desired frequency.. de Ben W4SC. Sent from Mail for Windows __ 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] K3 drive level for Q5 Signal 432 Transverter
Tried what you suggested Gary. No joy. The upper limit with the PWR knob remains at 0.8MW. I can adjust downward but not upward. Need to get a good power meter on it and see what the actual output is. And, I’ll try the low-level power calibration process and see what happens. Thanks again. Any others have any suggestions? David, NS4V > On Feb 27, 2022, at 3:21 PM, Gary Johnson wrote: > > Sounds like you should do the low-level power calibration using the K3 > Utility. For now, you can increase the maximum, up to 1.5 mW, and presumably > get the desired output. > > Gary NA6O > >> Using the Config Menu, I have set the drive level at the maximum for the >> transverter at 1 MW. However, when I check the drive from the front panel >> PWR knob it reads 0.8MW and I cannot adjust it any higher with the knob. >> Nothing I do seems to change the the PWR knob drive level. I am running SSB >> on 432.095. >> >> Any suggestions would be most appreciated. >> >> Tnx es 73, >> >> NS4V NS4V David R. Hourdequin, PE 828-421-6216 d...@dremy.com www.dremy.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] K3 drive level for Q5 Signal 432 Transverter
Sounds like you should do the low-level power calibration using the K3 Utility. For now, you can increase the maximum, up to 1.5 mW, and presumably get the desired output. Gary NA6O > Using the Config Menu, I have set the drive level at the maximum for the > transverter at 1 MW. However, when I check the drive from the front panel > PWR knob it reads 0.8MW and I cannot adjust it any higher with the knob. > Nothing I do seems to change the the PWR knob drive level. I am running SSB > on 432.095. > > Any suggestions would be most appreciated. > > Tnx es 73, > > NS4V __ 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] K3 drive level for Q5 Signal 432 Transverter
Using the Config Menu, I have set the drive level at the maximum for the transverter at 1 MW. However, when I check the drive from the front panel PWR knob it reads 0.8MW and I cannot adjust it any higher with the knob. Nothing I do seems to change the the PWR knob drive level. I am running SSB on 432.095. Any suggestions would be most appreciated. Tnx es 73, NS4V David R. Hourdequin, PE 828-421-6216 d...@dremy.com www.dremy.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
