MFJ-941E MFJ941E MFJ Enterprises Original HF Antenna Tuner with Mini Cross Meter, 300 Watts

Worked perfect right out of the box. Power cable for meter light was included, nice.

Pros: Very effective antenna system tuning- gets me 1.1:1 on every frequency and radio. Decent quality- not top of the line, but good Accurate, calibrated meters Cons: Meters are simply too small and graduations are very silly, making readability challenging 12v lamp for meter is horribly yellow and dated looking. I immediately changed mine out in favor of a diffused white LED. Switches are stiff and do not have a positive click. Not a big deal but radio still receives when changing to coax 2, dummy load, etc- should have better isolation at this price. Overall a good value that serves 3 purposes well. Simply increasing the height and size of the meter would be the obvious manufacturing improvement that would make this the perfect product.

EXCELLENT

This is the 2nd 941e I have purchased in about 30 days. Each one arrived in sparkling condition but neither one would perform as an antenna tuner. The meter would not function on either. My meter on the transmitter (TS530S) functioned fine but zero response on the meter. The TS530S has a max operating wattage of 100 and the switch to and from 300 did not affect the meter. However, MFJ customer service responded to me about other models and had difficulty, 3 times today, even finding the model I was having problems with and kept telling me, strange.... or do you have it installed right. Yes, it is installed correctly and that is why I can transmitt in bypass. Jeez! I think I will spend an extra 100 to 200 and buy a decent tuner.

The product overheats with just 200 watts out of the stated 300 watts it should handle , and it starts allowing the swr to rise . Not a good product for the serious talker .

Item shipped and arrived as scheduled, but product was defective and I have returned it for refund. Bought it to replace an MFJ-949 tuner than died (balun burned up). New, defective tuner would not tune existing antenna on any bands. Adjustments of inductor nor either capacitor had any effect on any band. Either the built-in SWR meter is bad or, more likely, the tuner itself.

It will tune most bands. Meter is hard to read on tx. Still having to adjust it a lot each time I use it.

I give this a 2-Star only because it didnt burn down my shack !! You get what you pay for. Some reviews pupped up my hopes... NOPE !!

I use it to tune my stealth inverted V. My homebrew tuner cant tune it on 80, so I hoped this tuner would do the trick. It was not able to achieve much of a match (~5:1 SWR) on 80 but tunes it well on 40 - 10 meters. Switched inductor and nice dials on the capacitors make it easy to return to settings when switching bands. Crossed needle meter makes it easy to see if you are adjusting in the right direction. Multiple antenna selections are handy. I didnt have a chance to try it on a balanced line antenna yet. I dont have instrumentation to assess its losses, but I was able to work several stations on each of the working bands with modest power (~80 W, not bad for a low inverted L (about 20 ft off the ground). I have some ideas to try to get the antenna working on 80m, some of which are suggested in the manual. Speaking of the manual, its only available online, and is downloadable. So, I tried feeding the coax feed as a single conductor (shield is connected to ground rod at far end, so its hard to predict what impedance that reflects to the tuner). The MFJ was able to get a good match with that. I also tried using my homebrew tuner in cascade with the MFJ, hoping the h.b. tuner would push the impedance within range. That almost worked, but not as well as feeding it as a single conductor. No QSOs on 80 m yet, so still not sure how well it works, but SWR is below 1.5 so Im optimistic. A single gripe and a suggestion or two. The meter LED blew out when coupling to a difficult load. RF coupled into it, and incinerated it with smoke evident. I suggest adding a series resistor and bypass capacitor at the LED to reduce likelihood of recurrence. I also added small bypass capacitors to the meters, to better protect them from RF and reduce their tendency to follow the audio on SSB. It should make them last longer. I rewired the Balun to a 4:1 un-un. This allowed the tuner to match higher Z loads, but you lose the balanced-line feed so it depends on what youre going to feed with it. Im going to drill a small hole in the rear panel and add a DPDT switch so I can select both configurations, but dont have the tools to do it here at my vacation QTH. Im not sure how much power it can handle as an un-un, but it had no problem with my 80W transmitter.

Just a little large but and excellent piece of equipment,, Used immediately and it worked without any cause for concern,,, Tuned a short end fed wire on a 9-1, un-un perfectly the first time,,,