- Amateur Radio (Ham Radio) Community

Call Search

New to Ham Radio?
My Profile

Friends Remembered
Survey Question

DX Cluster Spots

Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement

Categories | Antenna Tuners | S.E.M. Transmatch Help

Show all reviews of the S.E.M. Transmatch

You can write your own review of the S.E.M. Transmatch.

GM0WEZ  Rating: 5/5 Jan 19, 2008 16:13  Send this review to a friend!
Quality Manx engineering  Time owned: 6 to 12 months
If you want a balanced tuner there are not many options - the Johnson Matchbox, the KW Eezeematch, and I think MFJ now offer a balanced tuner. There is also the SEM Tranzmatch, made on the Isle of Man, and widely available on British ebay.

Some of the SEM Tranzmatches have a dummy load, some have 160m coverage, some have the ezitune noise bridge circuit. Mine has all three. The most basic model seems to go for around 60, often more for the options.

It will tune end fed wires etc but it really shines when using balanced feeders to a doublet or loop. Tuning is quick and reproducible. It nearly always copes with 100watts - on a few settings it objects but these can be noted and avoided.

The direct setting bypasses the tuner. This is handy if you're tuning down to medium wave for broadcast stations, navtex, 500khz ham etc, as I find at these very low frequencies you get better results bypassing the tuner.

Ezitune needs 12v at 25mA (centre positive on mine) but isn't really worth having in my view.

Its quite big - bigger than the photos suggest at circa 8.5 x 4.5 inches. There is no integral meter.

The engineering is pretty good with a robust case and fairly well rated components.

The 'manual' (one sheet) is available on line at:

Product is in production.
Email Subscription
You are not subscribed to this review.

My Subscriptions
Subscriptions Help

If you have any questions, problems, or suggestions about Reviews please email your Reviews Manager