7290 KHz is used for amateur AM activity. As for qrp AM, check out smallwonderlabs.com for the retro-40 that was added to the product line. Must be a fair number of hams that think QRP AM is a good thing! 73 - Mike WA8BXN -------Original Message------- From: Don Wilhelm Date: 12/5/2011 8:38:31 PM To: Frank MacDonell Cc: Elecraft Subject: Re: [Elecraft] K3 on AM Fred, I am not certain whether your question is serious or in jest. First, an AM station on 7.290 kHz is a commercial; broadcast station, And likely has no reception capability - so why would one want to Transmit in AM on that frequency with any transceiver. Yes, the K3 can transmit AM *if* the 6 kHz roofing filter is installed. As for AM QRP operation, I have my doubts - SSB is much more effective. The power for an AM station is split 4 ways - 1/2 of the power goes into The carrier (which carries no intelligence) and 1/4 of the total power Goes into each of the sidebands, So if one transmits "QRP" at 10 watts AM, the amount of effective "talk" power that goes into each sideband is 2. Watts. You would have a +3db advantage just by going to SSB at 5 Watts PEP. If you consider the total power consumed, a SSB signal with A PEP rating of 10 watts will produce a much more copyable signal than 10 watts AM. 73, Don W3FPR On 12/5/2011 7:58 PM, Frank MacDonell wrote: > I have an Elecraft K3/10 getting great reception on AM using attic dipole > on 7.290 mHz. Does this mode transmit well for QRP? (I use digital modes > and do not own a mic.) > Thanks in advance. > ______________________________________________________________ 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 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected]
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