eHam.net - Amateur Radio (Ham Radio) Community

Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
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
About eHam.net


Reviews Categories | Antennas: HF: Vertical, Wire, Loop | MFJ-9232 QRP LOOP TUNER Help


Reviews Summary for MFJ-9232 QRP LOOP TUNER
MFJ-9232 QRP LOOP TUNER Reviews: 4 Average rating: 4.3/5 MSRP: $$59.95
Description: The MFJ-9232 Mini Loop Tuner is a small, versatile, high-
efficiency device that turns any wire loop into a high-
efficiency multi-band transmitting antenna system. It is
designed for 50-ohm use at QRP- power input on all modes.
Tiny QRPocket Loop Antenna makes portable operation truly
portable and fun! No ground needed! This high-efficiency
loop covers 40-10 Meters with included flexible wire
loop. Handles 25 Watts. Has BNC connector for
transmitter, two wing nut posts for loop wire
connections, tuning/matching capacitors.
Product is in production.
More info: http://www.mfjenterprises.com/Product.php?productid=MFJ-9232
Email Subscription
You are not subscribed to this review.

Subscribe!
My Subscriptions
Subscriptions Help

You can write your own review of the MFJ-9232 QRP LOOP TUNER.

K2FI Rating: 4/5 Oct 21, 2017 15:52 Send this review to a friend
A nice addition to your QRP toolbox  Time owned: 6 to 12 months
The MFJ-9232 is a fun and inexpensive way to experiment with loop antennae with a couple of caveats. First, the supplied wire probably won't tune on any band as it is. That said, it's very easy to experiment with different wire lengths. I've been very successful with a 10' length of RG-8 on a PVC frame tuning 40 to 15. One length of wire may not be good for all bands so you might want to experiment with different lengths. #10 wire is fine as well, so don't be afraid to play around.

One major caveat is that loops are tricky to tune. If you have problems with fine motor skills, you're going to be frustrated. Tune to each band with the left knob, and then fine tune with the right; you likely won't need to touch the left within the band unless you're doing something like the bottom end of the CW portions of the band to the top end of the SSB portions.

Receive sensitivity is good. I pick up much less noise than I do on my other portable antennae. And as a loop, it's directional, so you'll want to aim it accordingly.

The other caveat is that the tuner is designed for QRP power levels. You likely won't be busting through any big pileups, even if the signal sounds crystal clear.

Still, those are minor. If you're a QRP enthusiast, especially if you operate portably, this is well worth having in your arsenal.
 
KE0NAZ Rating: 4/5 Jul 12, 2017 06:42 Send this review to a friend
Interesting at least  Time owned: 0 to 3 months
Lets start with ; I am a new tech. KE0NAZ.
I watched several videos about mag loops and thought - this could be for me.
I purchased from Gigaparts and received it pretty fast from them. Packed well and no issues. I paid around 70 including shipping.
I read the reviews here before I buy so I was aware the supplied antenna wire was not a good choice. So I went to Home Depot and got bare copper 10 gauge. I even got some PVC to make a frame. Construction was pretty easy , and I was confident it would be ok.
I don't think the ear ball method of tuning is very good. So I used a meter. With 50 feet of coax (gasp!) my VSWR was really high on 10 meters with the recommended wire length of 4 feet (as per directions from manufacturer). Like around 6.6 to 1.
After much reading I went to 6 feet of 10 gauge copper wire. Still high but a lot lower now, 3.6 to 1.
Soooo..
7 feet of 10 gauge wire. I came in around 1.36 to 1.
I went to Wally World, purchased a hula hoop with no metal tape or fancy lights , and wrapped the wire around it to make a somewhat stable loop. I use a Savage 13 foot tripod and Velcro and some spare PVC pipe and I have a portable QRP loop for my FT817ND.
So far Im just fishing for QSO's but it seems to work well...
I would buy again just for the experience of " building " my own antenna. Never did that before.
worth the 70 bucks to me anyway ...
73's..KE0NAZ..
 
K2GK Rating: 4/5 Feb 5, 2017 12:11 Send this review to a friend
A-OK  Time owned: 6 to 12 months
Remember it s for 5-10 watts. Small learning curve to tune it well. after that you will love it. Best radio fun you can get for $60 bucks. And it really works as a good antenna.No counterpoise just mount it with enough wire to resonate the band you want to work and enjoy the QRP. Check the Facebook group Ham Radio Outdoors for their pictures and first hand use of it.

Yes I'd buy another if this one broke. k2gk
 
NE8U Rating: 5/5 Apr 5, 2016 14:57 Send this review to a friend
Amazing for such a small setup!  Time owned: 0 to 3 months
While it comes with some small-gauge wire for the loop, everything I read (to include the MFJ-9232 manual) says to use at least 10 gauge wire. I found a 10 foot length of #8 gauge wire at the local big-box store and bought it for $6. Picked up some 3/4 inch PVC while I was there to make a frame for the wire. The heavier gauge wire makes it easier to properly shape the loop, and it should conduct better.

I connected everything up and set my radio to 20 meters. Tuning the antenna isn't hard; follow the directions in the manual to "ear-ball" tune. Make small moves and listen for an increase in background noise followed by a rapid fall-off. Peak the noise. Do the same with the matching knob, going back-and-forth with the tune to peak. I checked my "ear-ball" tune with an SWR meter and was usually quite close. After some practice, "ear-balling" seems to work fine without using a meter, though the meter helps get it exact.

Reception was great! I heard stations from all four corners of the Continental US, as well as Alaska, Hawaii, Canada and Mexico. Transmitting wasn't bad, considering I was operating SSB QRP (5 watts). I made two contacts, one about 1000 miles away and the other over 800. All while sitting in my garage.

Is it as good as a properly installed and tuned dipole or a 60 foot directional? Of course not. But I need something I can set up on my condo balcony while on vacation and have some fun, and this certainly meets my requirements.

Some pointers:
While the manual mentions clipping the wire to a curtain or draping over a bookcase - Don't! I could never get it to tune properly when it was up against objects like walls. Hence, the free-standing PVC frame. Moving the loop outside or even just away from the walls while inside will improve performance considerably.

The tuning is fairly sharp, so you may have to re-tune as you move through the band.
 


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