I obtained some 7-pole LP filters from Coilcraft: http://www.coilcraft.com/lcfilt.cfm http://www.coilcraft.com/pdf_viewer/showpdf.cfm?f=pdf_store:lcfilt.pdf cost $3.00 in single quantities.
This would take care of harmonic suppression. I have five of these for different frequencies but have been working on other projects so have not measured them using the XG3. I intend to install mine in 1-inch copper pipe with BNC connectors for better isolation at very weak signal levels, but that would not be needed if incorporated into a beacon amplifier. The easiest approach for that is using mmics and RF modules that are 50-ohm in/out. All that is required is some dc bias and some RF bypassing of the dc lines. This is probably more appropriate for a third party than Elecraft. I'm guessing it would be a low volume item. I proposed the MAR-6 plus M57735 to John Ragle. The M57735 costs $67.75 from RFParts. http://www.rfparts.com/pdf_docs/57704-68776/57735.pdf The M57735 is rated 17w out for 200mw in, so with 20mw drive one might get 1.7w (gain = 25 dB with 10mw drive). The MAR-6 are about $5 and will provide about 16-18dB gain with 0dBm input. Add filter, misc components, connectors, pcb, and enclosure and it is looking like about $100 without labor to assemble it. Someone offering this as a kit would probably want another 25% markup for their time. Add $12 for flat-rate shipping. How many folks would order a kit? 73, Ed - KL7UW, WD2XSH/45 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 50-1.1kw?, 144-1.4kw, 432-100w, 1296-60w, 3400-? DUBUS Magazine USA Rep [email protected] ====================================== ______________________________________________________________ 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
