David, Double shielded coax would certainly reduce leakage from the coax, and is a good investment in my opinion. However its use might not have too much impact on the receiver's birdie problem, because many of the "rogue" signals involved are probably flowing on the outside of the coax's braid, certainly if the coax emerges from some enclosure through a hole.
The usual cause of a receiver birdie is that some response of the receiver is "hearing" some oscillator or a harmonic, or some mixing product of two or more oscillators, contained within the receiver. In a down conversion HF receiver, the great majority of the receiver's responses, therefore the "rogue signals", that cause birdie problems are at HF and up to low/ mid VHF, which means that choking off coax runs within a receiver becomes cumbersome. 73, Geoff GM4ESD David Cutter wrote on Wednesday, March 04, 2009, at 10:32 AM: >I also wonder if it would be worthwhile buying higher spec coax. Don't >know what is used in the K3, but for the lengths involved it would be worth >the investment to get short cables made in say LMR100 or RG142 etc if it's >not already > > David > G3UNA ______________________________________________________________ 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
