[AMRadio] WTB - MURCH UT-2000A


Donald Sanders w4bws at yahoo.com
Sat Jun 12 22:04:50 EDT 2010


I am not famiiar with the BC 610 output circuit however it may be link coupled and 600 ohm or other high impedence as most of the transmitters in the late 30's and 40's. The Murch is designed to match an antenna to a 50 to 75 ohm load. Therefore you may be exceeding what the Murch is capable of doing.
Don




________________________________
From: rbethman <rbethman at comcast.net>
To: Discussion of AM Radio in the Amateur Service <amradio at mailman.qth.net>
Sent: Sat, June 12, 2010 5:22:36 PM
Subject: Re: [AMRadio] WTB - MURCH UT-2000A

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

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