Bob, I don't dump a rig full power into a tuner and start adjusting it. I don't own a 610 but I agree that would not be good for the 610. I have never owned one of those Murch tuners (I remember the original QST article though) so it may be true that the Murch won't handle the full output of the 610 with a lot of modulation and a long transmission. Before giving up on it, it sounds to me like what you are having difficulty with is the time it takes to find a match. You need some kind of low power signal source that is enough to get a reflected power measurement, 10 watts say, or one of those SWR analyzers. I'd tune the 610 into a dummy load like you have been doing and put the tuner and antenna on an analyzer so you have plenty of time to mess with it. If it is working okay you should be able to find a way to transform your feed line to 50 ohms if there is nothing bizarre about it and your antenna, then you can switch it off the analyzer and switch the 610 on it and fire away and see if the Murch arcs or gets hot. I do that with all my tuners here because the environmental conditions outside are always changing and affecting the antennas a bit and they are always interacting with each other and I have to mess around when I change bands and ground things or let them float (I can never remember which, it varies with the band and the antenna) so the analyzer is a must have before I start dumping power into a matching network. Sometimes I'll get a slightly false reading because the analyzer is getting some signal from something else but it gets me in the ball park and I can put about 10 w. into the tuner to hit the reflected power null. Of course none of this is any good for ops who are running around chasing dx and contesting but it is fine if you are like me and squat on one frequency for an entire evening hi hi.
If none of this works, why not sell the Murch to the fellow who is looking for one and fix yourself up a big L network if you are using coax feedline. Get yourself an aluminum box, a few 30 KV doorknobs, an air variable cap like an amp load cap, roller inductor and a ceramic switch for the doorknobs. With a little wiring and testing it will probably sit there and handle the 610 all day. I did something like that but I used banana plugs and jacks and jumpers and left it open because I don't have kids or pets. 73 Rob K5UJ On Sat, Jun 12, 2010 at 5:22 PM, rbethman <rbeth...@comcast.net> wrote: > I don't care if Marconi himself designed it. > > It will NOT tune a BC-610 to ANY antenna! > > Even after setting the BC-610 to the 400W ME-165G 50 ohm dummy load > first. It would melt the final before it managed to "match" anything. > 250THs don't grow on trees! > > I have the manual. I have checked it against the schematic in the manual. > > I'd take one of the Heath tuners, the high power ones, ANY day over the > Murch! > > I don't know how long others have been at this, but that has been my > experience since 1980! There is equipment, then there is purported > "ultimate" that is nothing but junk. > > Bob - N0DGN > > On 6/12/2010 6:12 PM, Robert Nickels wrote: >> The Murch UT-2000A is a commercial version of the classic "Ultimate >> Transmatch" designed by Lew McCoy and featured in the July 1970 issue of >> QST and numerous ARRL handbooks. It's called "ultimate" because it is >> able to match coaxial-fed antennas, end-fed wires, and with the addition >> of a 4:1 balun, balanced feeders. The manual is on BAMA and I can send >> you a copy of the QST article if you need it. >> >> Add a good SWR/power meter and once you learn how to tune it, the Murch >> will match most anything you can hook to it, 160-10 meters, up to a KW. >> >> 73, Bob W9RAN > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio@mailman.qth.net > To unsubscribe, send an email to amradio-requ...@mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
