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

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

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

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

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