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Reviews Categories | Transceivers: VHF/UHF+ Amateur Hand-held | Mizuho MX-6 Help

Reviews Summary for Mizuho MX-6
Mizuho MX-6 Reviews: 2 Average rating: 3.5/5 MSRP: $(missing—add MSRP)
Description: 6m SSB/CW 250mw handheld transceiver
Product is in production.
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You can write your own review of the Mizuho MX-6.

K5RIX Rating: 5/5 Apr 13, 2008 22:56 Send this review to a friend
50 MHz QRPp fun  Time owned: more than 12 months
I bought mine in 1985 and recently sold it. Hooked up to a five-element yagi at 45 feet I worked over 100 grid squares from Los Angeles, about half and half cw/ssb. Very spartan rig; the ptt switch locks and needs to be depressed/released again to stop xmitting! A little chirp with internal batteries, but with the DC-DC 10-volt converter the cw signal was rock pure. Good audio reports from the incredibly cheap internal condenser mic.

Mine I set up with two Mizuho Xtals that gave me approximately 50.050 through 50.150 MHz. It was a huge thrill to work Boston on a quarter watt.

Certainly not for everybody, but I had a seriously fine time using this little rig.
KU4QD Rating: 2/5 Oct 19, 2002 23:22 Send this review to a friend
Very limited; newer versions are much better  Time owned: 0 to 3 months
The MX-6 was the first generation six meter SSB/CW handheld for Mizuho, and, indeed, the very first of Mizuho's vaunted MX series HF and VHF SSB/CW handhelds, dating all the way back to 1981. (The one watt MX-6S, a/k/a the AEA DX-Handy is the third generation rig.)

The MX-6 puts out all of 250mW, much like the MX-6Z that replaced it. It runs on a single 9V battery, either alkaline or rechargable, and, unlike the MX-6Z, it does have a charging cicuit built in. This original version had a screw-in, rather short telescopic antenna, not a BNC connector, and a mini audio plug, of all things, to attach an external antenna to. As a result, attaching a decent antenna is a royal pain. Also, the MX-6 is the only MX series radio with no allowance for an external speaker/mic. It really is meant to be used strictly as a true handheld?

As a result, the ability to make contacts with this little rig is sorely limited. I listened to the local 6m SSB net and heard stations 150 miles away with the very fine little receiver in the rig. Could I check in or be heard? No. The shortened whip is just too short. I've done it with the MX-6Z, particularly on a decent antenna, but couldn't with the MX-6. Oh, and I checked, it is putting out power.

This rig has no S/RF meter, no RIT, no attenuator, and no charging circuit. Otherwise operation is similar to the later models.

The MX-6 was really designed as an SSB handheld. CW seems to be an afterthought. You have to manually switch between transmit and receive and there is no sidetone. Fortunately, the PTT key latches, making CW quite doable. A switch at the bottom of the radio determines whether you are using in internal push-button at the top of the rig as your key or if you are using an external key.

The rig only draws 40mA on receive, and a whole 180mA when transmitting.

The MX-6 is the same size as all the other Mizuho HTs: 1"(D) x 2 5/8"(W) x 5 5/8"(H), and weighs in at just over a pound..

The rig is VXO controlled with two crystal slots, each crystal providing 50kHz of bandwidth, so you are pretty much limited to 100kHz. Optional crystals are still available directly from Mizuho on a special order basis. Expect to spend about US$23 per crystal to add/change band segments. Don't even think about domestic crystals: I don't know what Mizuho does, but US made crystals almost never give the full 50kHz of bandwidth, and often give much, much less.

Within its limitations this rig performs quite well. There isn't much difference in resale price between the more common and newer MX-6S, the MX-6Z, and the MX-6, so the newer rigs are definitely better choices. The MX-6 is strictly for the collector.

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