Hello, I am not sure what your signal source is for your calibration and I have not researched this topoc on this reflector so it may be covered in detail by others. I will convey what I have found about S meter calibration.
"SMTR SC" and "SMTR OF" affect each other so if you change on you have affeced the other. There are several combinations that will yeild S9. If you have a signal generator and or a power meter you will see the relationship. I tried the calibration with the Elecraft generator and found it to be accurate at S9 and S3 as advertised. When I checked the K3 S meter with my signal generator at values other than S9 and S3 I found the meter to be off significantly. Through trail and error using my 8640B sig gen I found that if I played with different values of SC and OF that I could bet the S meter do display very accurately from S1 to S9+30 and everything in between. If you have access to a good signal generator and spend some time you can make the S meter very accurate. If you only have the Elecraft generator you will be accurate at S3 and S9 but beyond that you wont know. I hope this helps, Ken, N0QO Graham Kimbell (G3TCT) wrote: > > I get very optimistic readings on my S meter above S9. I calibrated the S > meter on 7MHz as per instructions and everything seemed ok with SMTR OF > =26. According to my calculation 50uV is -73dBm. I increased the input and > got the following readings:- > > -53dBm (should be S9+20) reads 9+30 on 6m and 9+35 on 40m > -43dBm (sh be S9+30) reads 9+45 on 6m and 9+55 on 40m > -37dBm (sh be S9+36) reads S9+60 on 6m and would be more on 40m if the > meter went further. > > Anyone else notice this? > Should I change the value of SMTR SC and if so, to what? > > Graham > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > -- View this message in context: http://n2.nabble.com/K3%3A-S-meter-calibration-tp579287p583503.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
