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Reviews Categories | Antenna Tuners | ZM-4 QRP ATU Kit by Help

Reviews Summary for ZM-4 QRP ATU Kit by
ZM-4 QRP ATU Kit by Reviews: 2 Average rating: 5.0/5 MSRP: $87
Description: The ZM-4 is a QRP Z-Match ATU Kit. Housed in a rugged extruded aluminium case with a large torroid and PCB.

No additional parts to buy - the kit includes everything bar the tools and time.

Balanced and Unbalanced output from Banana Jacks and BNC.

Matches high and low Z antennas from 160m to 10m.

Built in Wheatstone Bridge for SWR sensing.
Product is not in production.
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PE1FJN Rating: 5/5 Dec 8, 2012 08:29 Send this review to a friend
FINE QRP tunere  Time owned: more than 12 months
Fine KIT, works good with QRP equipment, and has the advantage of additional filtering, off loading RF front end from strong out band signals.

Also the SWR bridge is nice, securing good VSWR during tuning and antenna experiments.

I use it with my T1380/T1340 and K1 with pleasure.

M0JMO Rating: 5/5 Mar 16, 2010 07:19 Send this review to a friend
Works Great for QRP /P  Time owned: 0 to 3 months
I needed a small, light ATU for portable use with my new FT-817.

I owned an Emtech ZM-2 when I last had an 817 which worked well, however I was always a little worried about how well it would stand up to being rattled about when /P as there isn't a PCB inside to keep all the components stable.

This time, I did some more research and found the ZM-4, which is a German evolution of the ZM-2.

The kit arrived quickly to the UK and went together in a few hours.

Drilling the case was a bit tricky for me as I'm notoriously bad at this sort of thing, however it wasn't too bad and I made no mistakes!

The PCB is nice to work on and the large toroid is fairly easy to wind, even though there are multiple windings to deal with.

Instructions are good and are provided in German and English.

I've found that this ATU has tuned everything I've tried it on so far! Typical for a Z-Match I suppose, but it's nice to have the flexibility to tune whatever you have handy.

I'm really happy to have bought and built this kit.

Josh de M0JMO

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