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Reviews Categories | QRP Accessories | Oak Hills Research WM-2 QRP Wattmeter Kit Help

Reviews Summary for Oak Hills Research WM-2 QRP Wattmeter Kit
Oak Hills Research WM-2 QRP Wattmeter Kit Reviews: 40 Average rating: 4.8/5 MSRP: $89.95
Description: QRP wattmeter: 300 kHz to 54 MHz in 10W, 1W, and 100mW scales
Product is in production.
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IW3FZQ Rating: 5/5 May 7, 2008 10:45 Send this review to a friend
Great Wattmeter !  Time owned: 0 to 3 months
I also have 2 Daiwa meters and one Bird 43 but WM-2 is very funny to use! I've built it in some hours, if you read the included manual it is impossible to mistake or obtain bad behavior. It has a good nquality meter while all components are medium quality. Very low consumption, it works with 5 Volts too!!! I haven't found cigarettes ash inside like many HAMs !! It works until 70 MHz. After alignment, I compared it to my Bird 43 with a very minimum difference on HF and without difference between 28 and 70 MHz. OAK, well done! 73 de Enrico, IW3FZQ
N6HI Rating: 5/5 Apr 25, 2008 23:46 Send this review to a friend
See Link for step-by-step photos of kit construction  Time owned: 0 to 3 months
The Oak Hills Research WM-2 QRP Wattmeter is a great kit building experience for beginners and a VERY useful accessory item for any QRP station or test bench. Before I built this kit I had no way to really measure the output of my QRP rig accurately, and had to "guess" at my output power.

The guessing game is over, and the WM-2 is a great addition to my station. I am a dedicated QRPer, and have not used more than 5 Watts on ANY band or mode in the last 12 years. I don't know how I ever got along without one of these meters!

As digital photography is one of my "other hobbies" I decided to photo-document the entire process of building the WM-2 Kit, and have published the results on my website. If you are considering building this kit, you can see exactly what the process will entail if you go to my website at at:

... then click on "The Joy of Kit Building"

I highly recommend the OHR WM-2 Wattmeter to all QRP operators!

"72" John N6HI
K2JJ Rating: 5/5 Nov 18, 2007 14:16 Send this review to a friend
Nice unit with a few construction caveats.  Time owned: 0 to 3 months
I wouldn't recommend this as your first kit but if you are reasonably careful and have some help it could certainly be done. A few construction hints. Clean the PC board solder side carefully before you begin to remove any oxidation. This will help solder flow quickly and cleanly, The lands on the board are not uniform and only have a small area for the solder to stick in some places. A brown paper bag material is abrasive enough for the job, add a little contact cleaner to the paper if you wish.

On the external power/battery switch solder the wires to the switch BEFORE you mount it to the rear panel. The terminals on the switch are small and are easily shorted together or to the retaining tabs on the switch. This will allow you to inspect it easily. Very hard to see after it is mounted.

If you are not familiar with winding the coils get some help or use the the OHR contractor to do it for you. It is very important that these coils are wound properly.

Inspect the board carefully for solder bridges after installing each component particularly the 2 IC's. This step will save you trouble later as it is not that easy to remove the board for troubleshooting after it is installed.

Other than that everything goes together very easily. Alignment is easy but the pots can be a bit touchy to get the exact voltage you need. The meter works very well and is quite accurate as compared to my HP-436A power meter. All in all I think you'll be very satisfied with this product
NU4B Rating: 5/5 Apr 7, 2007 16:29 Send this review to a friend
Very nice Kit  Time owned: 0 to 3 months
This is a great kit for QRP'ers. My kit had all the parts. The instructions were easy to understand. Everything went together well. Alignment was also easy to do. I ended up with a nice looking piece of equipment that has already come in handy measuring milliwatt levels. If your running QRP or QRPp you will enjoy this kit.
OE3SGU Rating: 5/5 Oct 1, 2006 00:35 Send this review to a friend
Must have for the QRPer!  Time owned: 6 to 12 months
I am not an experienced builder but the WM-2 was a great experience. It was no problem to build it and it works very fine. A very useful tool in the QRPers shack. Highly recommended!
AE6CP Rating: 5/5 Sep 25, 2006 20:22 Send this review to a friend
Must have for kitbuilding  Time owned: 0 to 3 months
Not much to say, the kit is well put together. Worked fine the first time. Makes TX alignment a snap.
K1FPV Rating: 5/5 Aug 31, 2006 07:28 Send this review to a friend
Excellent QRP Accessory!  Time owned: more than 12 months
I built and have used my WM-2 for nearly 5 years now. It is accurate, and great for the price. I will add that when I built mine, not only the box smelled of tobacco smoke, but the components themselves also had the odor. Aften a month or two, the odor finally dissipated. It has worked great all the time I've owned and used it.
AI4IK Rating: 5/5 Aug 30, 2006 18:35 Send this review to a friend
You'll like it  Time owned: 6 to 12 months
This is a great wattmeter. I also like my heathkit qrp wattmeter but it doesn't read down into the milliwatts but is very accurate.

As for the cigarette smell in the box???!! I want to take you hunting with me and I'll leave my dog at home. You got a better nose than she does.

You girlie men need to get a life. People have to put up with the smell of your nasty alcohol habit. At least you don't see smokers with their head in a toilet throwing up like drinkers. Now that's a nasty habit!

Get one of these wattmeters. You'll like it.
POOBA53 Rating: 5/5 Apr 2, 2006 17:39 Send this review to a friend
Nice Product  Time owned: 0 to 3 months
All kit parts were present, instructions were for the most part easy to follow, and the finished product looks nice and performs as it should.

What more could ya' want?
KD6WD Rating: 5/5 Feb 13, 2006 08:59 Send this review to a friend
Great-a must have!  Time owned: 0 to 3 months
If you are into QRP you must have one. I feel its mandatory to have one if your going to claim 1,000 miles per watt. It beefy enough not to slide off the bench and has an excellent size meter for interpolation.

By the way to the guys who complained about cigarette smell. Get a life! Those comments were (in my humble opinion) just politically correct crap. It kind of reminds me of a fellow engineer who used to smell his armpits several times a day. Finally I said,"Take a shower daily, use some deoderant and you will not have to worry!"

I personally do not smell every box I receive from a supplier. In many cases everyone uses newspaper from neighbors or other recycled material to protect what you get from shipping damage. Personally I hate those damn plastic peanuts that go all over when you open a box. Also I do not care if the UPS guy smokes as long as he doesn't throw my deliveries on the porch from the end of the driveway like the US Postal Service does. So in rebuttal I just sent the wife out to get me a Monte Cristo cigar.

Enuff said on P.C. stuff.

Because it easy to forget to turn the meter off, add one of those little chip kits for switching off the battery automatically after 45 minutes or so. It will save you replacing the battery unnecessarily. In conclusion, its a very welcome addition to anyone getting into QRP. Get a kit, build it and enjoy. Its really a one of a kind setup you will find diffcult to find elsewhere if at all.
Over the years I have built quite a few Oak Hills kits and have never been disappointed with the performance. All in all its just plain "cool".
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