Hello Cookie, I am using 200' of 1-5/8" Heliax, and used LMR600 for all my phasing lines. The 10' flexible section around the rotor is LMR600UF. I think my total feedline loss is less than 0.5 dB. Before I found the free piece of big Heliax, I used free 3/4" CATV 75 ohm hardline, which also worked well at keeping the loss down. 7/8" Heliax can also frequently be found in these short lengths.
If you can't find any used or end of spool pieces of hardline, new LMR600 has a loss of 0.5 dB per 100', so it also is a readily available option. With all these options, and the fact that most people have 6m feedlines shorter than 200' long, it really is getting pretty easy to achieve a feedline loss under 1.0 dB on 6m. GL and VY 73, Lance On 4/27/2010 5:02 PM, WILLIS COOKE wrote: > Lance, what kind of coax are you using that only has one dB loss at six > meters? 7/8" Heliax would do it, but LMR-400 would not unless you could > keep the run under 100 feet. > Willis 'Cookie' Cooke > K5EWJ > > > ------------------------------------------------------------------------ > *From:* Lance Collister <[email protected]> > *To:* DM4iM <[email protected]>; Reflector Elecraft > <[email protected]> > *Sent:* Tue, April 27, 2010 11:25:52 AM > *Subject:* Re: [Elecraft] DC-supply for a preamp? > > On 4/27/2010 2:32 PM, DM4iM wrote: > > Elecrafters, > > this might be a rig-killer and vy stupid, but.... > > > > Can i power a 6m masthead-preamp by feeding dc via choke and coupling > > C's to the KXV3A's in/out sockets (where the elecraft preamp is supposed > > to sit), or is this a big NONO? > > > > Martin > > > Hello Martin, > > I think you could do better by simply installing the PR6 at the K3 and > using low > loss coax to the antenna. Almost all the 6m EME stations around the > world use a > good external preamp in the shack. If your coax cable loss is 1 dB or > less, you > will not gain anything by mounting the 6m preamp at the antenna. > > You can model this for yourself in the EME CALCULATOR (accessed from the > EME ECHO > MODE screen in the old WSJT Version 4). Because the EME CALCULATOR and > EME ECHO > MODE were never re-written in the language used in more recent revisions > of WSTJ, > that old version is still available: > > http://www.physics.princeton.edu/pulsar/K1JT/WSJT498.EXE > > I think you will find it much simpler to keep the preamp in the shack! > GL and VY > 73, Lance > > -- > Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, > ZF2OC/ZF8, E51SIX) > P.O. Box 73 > Frenchtown, MT 59834 USA > QTH: DN27UB > TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj > LIVE MESSENGER CHAT: [email protected] <mailto:[email protected]> > 2m DXCC #11, 6m DXCC #815 > > Interested in 6m EME? Ask me about subscribing to the Magic Band EME email! > http://6meme.com/mailman/listinfo/magic_6meme.com > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] <mailto:[email protected]> > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj LIVE MESSENGER CHAT: [email protected] 2m DXCC #11, 6m DXCC #815 Interested in 6m EME? Ask me about subscribing to the Magic Band EME email! http://6meme.com/mailman/listinfo/magic_6meme.com ______________________________________________________________ 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
