Wayne,
Thanks for the great operating tip and for the explanation of the data path. Split works very well and keeps the CW Skimmer output pristine. For my own peace of mind - Can I assume, then, that it is safe to transmit 100 watts into a transmit antenna approximately 20 feet from the KX3's separate receiving antenna, and that as long as the KX3's PTT is activated and the KX3's TX light is illuminated, I'm not doing damage to my KX3? Incidentally, I'm very much looking forward to the KXPA100 and will be one of the first in line to order it once it is announced. Best regards, Mark Glenn K7MJG From: wayne burdick [via Elecraft] [mailto:ml-node+s365791n756726...@n2.nabble.com] Sent: Sunday, December 16, 2012 6:30 PM To: K7MJG Subject: Re: Possible firmware regression related to ACC2 IO / PTT=LO Mark, When the KX3 is placed in transmit mode, it doesn't disable its RX I/Q outputs. These come directly from the receive mixer. Since the KX3's local oscillator is still active in transmit mode, too, a really strong signal (one that gets around the T/R switch) could still give you a strong enough response at the I/Q outputs to be decoded. It might vary with relative positions of the equipment, cables, etc. You should be able to prevent the decode by putting the KX3 into SPLIT mode, with VFO B moved well out of the target band. This way the LO would be shifted in transmit mode so that any decode would be out of the range of Skimmer. For example if you're on 20 meters, set VFO B to well below the band edge, say 13.8 MHz. Let me know if this works. 73, Wayne N6KR On Dec 16, 2012, at 5:13 PM, K7MJG wrote: > Wayne, > > Thank you for taking the time to reply on a weekend. > > I'm not an EE, so I could have flubbed this test, but here is what I > did: > With ACC2 IO PTT=LO, KX3 power output set to 0.0W, and CW Skimmer > monitoring > the RX I/Q from the KX3, I plugged a brand new plug into the end of > the > short ACC2 cable supplied with the 'KX3-PCKT Cable Set' (no > connection to > the 590), then shorted the tip to the sleeve. The KX3 TX light came > on as > expected. I keyed up a short dit on the 590 at five watts (into a > dummy > load, for the record) and was able to see the dit show up on the CW > Skimmer > screen at the 590 TX frequency. > > Curiously, when I went to the KX3 right after reading your post, I > could not > immediately recreate the behavior. With no intentional change to > the setup, > it started happening again, which is when I did the experiment above. > > Let me know how you'd like me to proceed. I can try to load older > versions > of the firmware, but I'll wait for your recommendation. > > 73, > Mark Glenn > K7MJG > > > > -- > View this message in context: http://elecraft.365791.n2.nabble.com/Possible-firmware-regression-related-to-ACC 2-IO-PTT-LO-tp7567198p7567268.html > Sent from the Elecraft mailing list archive at Nabble.com. > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html _____ If you reply to this email, your message will be added to the discussion below: http://elecraft.365791.n2.nabble.com/Possible-firmware-regression-related-to-ACC 2-IO-PTT-LO-tp7567198p7567269.html To unsubscribe from Possible firmware regression related to ACC2 IO / PTT=LO, click here <http://elecraft.365791.n2.nabble.com/template/NamlServlet.jtp?macro=unsubscribe _by_code&node=7567198&code=bWdsZW5uQGNveC5uZXR8NzU2NzE5OHwtMTU1MjE2Mjc0> . <http://elecraft.365791.n2.nabble.com/template/NamlServlet.jtp?macro=macro_viewe r&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespa ce-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespa ce&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble% 3Aemail.naml-send_instant_email%21nabble%3Aemail.naml> NAML -- View this message in context: http://elecraft.365791.n2.nabble.com/Possible-firmware-regression-related-to-ACC2-IO-PTT-LO-tp7567198p7567281.html Sent from the Elecraft mailing list archive at Nabble.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
