If you're interested in every "jot and tittle" in the 896 page US National Telecommunications and Information Administration (NITA) "Redbook"* I'd drop a note to [email protected] and ask that question. Be sure to specify whether the K3 is intended for fixed, land mobile for maritime use.
Unless you're buying the K3 for use by a government agency or commercial activity only the transmitter specifications should be of concern: The NTIA Redbook" specifies a frequency stability of +/- 20 Hz for an HF SSB transmitter in the K3's power class in fixed station service. That means within 40 Hz of the intended frequency. The K3 specification shows a frequency stability of 5 ppm using the stock TCXO or 0.5 ppm using the optional TCXO. So it meets the +/-20 Hz (or 40 Hz total) requirement up to 8 MHz with the "stock" TCXO and meets the requirement throughout its range (to the top of 6 meters) with the optional high-stability TCXO. NTIA spex for spurs are a little more complicated. For SSB from 100 to 150% of the authorized bandwidth from the assigned frequency the spurs must be at least 25 dB down. For 150 to 300% the spurs must be 35 dB down and beyond 300% the spurs must be 43+10log(Py) down where Py is the mean output power. The published specification for the K3 is for spurious products to be >50 dB, so it should meet the 63 dB spec at 50 watts mean power output. Note that's not "peak" power, but "mean power" per the NTIA spec. And the Elecraft spec *may* be better than that, saying "greater than 50 db. Of course, you'd want to equip it with the proper SSB xmit filter and set it up properly However, the NTIA specifies 3 kHz the necessary bandwidth for normal voice intelligibility. Ron AC7AC *http://www.ntia.doc.gov/osmhome/redbook/redbook.html -----Original Message----- Is the Elecraft K3's transmitter NTIA compliant? If not, are there plans for NTIA compliance in the future? Howard ______________________________________________________________ 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
