This has been asked before and Wayne has indicated that K3 cannot be extended below 490-KHz. I am using my K3 on the 495-510 KHz experimental band as a driver for a 100w transmitter (4.15w ERP). You need the KXV3 transverter I/F and the KBPF3 general coverage filter for the K3 to operate on 500-KHz. Then you operate at 0 dBm output by entering the TEST mode. You need some linear amplification for useful transmit power. For the new band ERP=1w implies an amp with 25w output.
To extend use of the K3 lower in frequency a transverter can be made. Look at: http://www.kl7uw.com/600m_XVTR.jpg But there is another solution: The KX3 will tune to 310-KHz if you have the internal ATU. Wayne wrote me that they have not determined if an external LP filters will be needed, so look at: http://w1vd.com/LPF.pdf Also they are not sure what the KX3 output power level will be (my guess 20mw -1w). For more info about the ARRL 500-KHz Experimental Group: http://www.500kc.com/ http://www.kl7uw.com/600m.htm 73, Ed - KL7UW ---------------------------- Message: 29 Date: Fri, 10 Feb 2012 11:00:55 +0000 From: David Pratt <[email protected]> Subject: [Elecraft] [K3] New 472kHz LF band To: [email protected] Message-ID: <[email protected]> Content-Type: text/plain;charset=us-ascii I see from the report of WRC-12 that a new band 472-479kHz is to be allocated on a world-wide basis with an eirp of 5W (1W in some countries). The K3 receiver currently goes down to 490kHz. Is there any likelihood that this could be extended down to cover the new band? 73, Ed - KL7UW, WD2XSH/45 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-? DUBUS Magazine USA Rep [email protected] "Kits made by KL7UW" http://www.kl7uw.com/kits.htm ====================================== ______________________________________________________________ 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
