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#1
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Murch Antenna Tuner
Anyone have any experience or know anything about the Murch
UT2000B transmatch. I ended up with one of these in a (retired) lot that I aquired. Says it works 10-160 meters. Power rating 2KW PEP. Takes coax or balanced line. Seems like it is pretty good, it has a rolling inductor. I was advised to use my 250W Johnson Matchbox rather than the Murch for feeding my balanced line fed loop. I was planning to eventually use a 4 tube 811A type linear amp (like the 30L-1). Why would someone advise against the Murch in favor of the Johnson for the balanced line? The Murch has 160M, the Johnson no (unless I were to modify it). I may have two antenna options, one coax, the other balanced line, maybe I should use both tuners and add switching. (The Murch does not have a built in antenna switch, the switch it has is either "in", "out", Dummy Load, or Grounded.) Bill K6TAJ |
#2
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On Fri, 30 Apr 2004 04:30:38 GMT, zeno wrote:
Anyone have any experience or know anything about the Murch UT2000B transmatch. I ended up with one of these in a (retired) lot that I aquired. Says it works 10-160 meters. Power rating 2KW PEP. Takes coax or balanced line. Seems like it is pretty good, it has a rolling inductor. I was advised to use my 250W Johnson Matchbox rather than the Murch for feeding my balanced line fed loop. I was planning to eventually use a 4 tube 811A type linear amp (like the 30L-1). Why would someone advise against the Murch in favor of the Johnson for the balanced line? The Murch has 160M, the Johnson no (unless I were to modify it). I may have two antenna options, one coax, the other balanced line, maybe I should use both tuners and add switching. (The Murch does not have a built in antenna switch, the switch it has is either "in", "out", Dummy Load, or Grounded.) Bill K6TAJ Hello Bill, I used a murch Tuner for many years , it's a fine tuner and will work well for you.. the Reason most people give for using the Johnson over a T- Network like the Murch is that the Johnson is a true Link coupled Balanced line tuner and is a bit more effecent and give better balanced output to the fed line.. I had the murch 2000a which did not include 160M but on 80-- through 10m it workd fine with my horizontal loop and windham antenna.. Use it and enjoy. 73 Dave |
#3
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Bill,
I've used both (not on 160 meters, though). For the other bands, I really couldn't rell any great difference. If it were my choice, I'd modify the 'Johnson' for 160. It isn't that difficult, and I just like the 'Johnson'... 'Doc |
#4
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On Fri, 30 Apr 2004 04:30:38 GMT, zeno wrote:
Anyone have any experience or know anything about the Murch UT2000B transmatch. I ended up with one of these in a (retired) lot that I aquired. Says it works 10-160 meters. Power rating 2KW PEP. Takes coax or balanced line. Seems like it is pretty good, it has a rolling inductor. I liked my Murch, but eventually got rid of it because I wanted a built-in switch. I don't know if I had the A or B, but I don't think it had 160. If I remember right, that was one of the reasons for buying something else when I could afford it. I would be careful running power above 20m with it. The losses on 10m were such that I lost quite a bit of power through it and wouldn't use it. It was a great beginner tuner in the roller-coil class and I'm certainly not sorry I owned one. gm -- Replace x in adr with c |
#5
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I have a Murch 2000A sitting about 12 inches from this location and
right on top of my AL-80B linear amplifier. I run 1200 watts CW though it. It is a great tuner! Have used it for over 30 years and I WILL NOT replace it! But, it is intended for coax or end fed long wires, not for balanced lines. I have used it with an old B&W air balun to match 600 ohm open wire feeders. Deacon Dave, W1MCE zeno wrote: Anyone have any experience or know anything about the Murch UT2000B transmatch. I ended up with one of these in a (retired) lot that I aquired. Says it works 10-160 meters. Power rating 2KW PEP. Takes coax or balanced line. Seems like it is pretty good, it has a rolling inductor. I was advised to use my 250W Johnson Matchbox rather than the Murch for feeding my balanced line fed loop. I was planning to eventually use a 4 tube 811A type linear amp (like the 30L-1). Why would someone advise against the Murch in favor of the Johnson for the balanced line? The Murch has 160M, the Johnson no (unless I were to modify it). I may have two antenna options, one coax, the other balanced line, maybe I should use both tuners and add switching. (The Murch does not have a built in antenna switch, the switch it has is either "in", "out", Dummy Load, or Grounded.) Bill K6TAJ |
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