MX-K2 Morse Code Keyer Transmitter Shortwave CW Paddle Keyer Auto Memory Key Controller Auotmobile Transceiver for Radio Amplifier for Radio Amplifier Potentiometer Board Controller

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The housing it is hard plastic and protects the device well. The keyer does what is advertised. Be aware that there is a tiny oscillator that clicks when you send, and this can be annoying when your radio is also producing sound when you key it, but if you're not transmitting, it's a convenient practice device. This can be removed without much difficulty, but you will need a very small screwdriver, like the ones for adjusting glasses frames. Once the board is slid out from the housing, it's simple to remove the plastic jumper. Voilà, no more clicking. This is probably worth what you pay for it. Shipping to the US took a while. I wanted this kind of keyer to allow me to use my iambic paddle with an old Yaesu transceiver that is designed only for straight keys.

Worked perfectly. My second one.

PROS: Great little unit as far as doing what it is supposed to do. Can use it to practice as well as actually keying a radio that does not have a built-in side tone generator. Has a tiny speaker (of sorts) that is plenty loud enough to hear.CONS: 1. Screws/Batteries; This unit is hard on batteries. Takes two AAA batteries and you have to remove 4 tiny screws to gain access to the battery holder. Once those are removed you have a delecately wired front panel dangling and in danger of getting ripped loose. THEN when reassembling the screws act as though they need to cut new threads. I plan to drill out the holes and tap new threads for maybe an M2 screw. 2. Speed control; The speed control knob sticks out much further than it needs to. Also, there is no way to tell exactly at what wpm speed you are setting. I know.. set it to what's comfortable for the user HOWEVER, I am learning CW and I need to stick with my current level of instruction. To overcome this shortcoming I set up the side tone generator on my Kenwood to my currently desired 15 wpm. Connecting the paddles to the radio I made a 10 second audio recording of the rate. Then connected the paddles to this keyer and played the recording while adjusting the speed knob. PITA when you consider how easy it would have been to use a rotary encoder instead of a variable resistor to define the wpm rate. 3. Instructions; Good luck trying to figure out what they are saying when you read through the included instructions. If you have special insight into what the developer had in mind you might be able to see through the verbal shorthand and determine what they had in mind. I couldn't. So, I have no idea how to use the F1 and F2 buttons but... I don't really need them for anything I'm doing so.. no big deal. I just think they should have run those instructions past a few hams and take input on possible improvements.Overall, I will use this until it breaks (won't be long probably) and then drop it in the trash and go in search of something better. And, no, I would NOT recommend this device to anyone I like.UPDATE: I did as I initially thought I would regarding the cheap screws that have to be taken out every time. I ran a M2 tap down the existing opening for the screws and then used 4 M2 cap screws. Still a PITA to take them out for battery changes but still easier than the 'strip-easy' cheap screws they put in there to start with. So now it takes a 1.5mm allen wrench to remove the screws but they are certainly more secure than the original fasteners.

this is a cheap keyer with fewer features than nearly every other keyer on the market...bad 'manual' if you can call it that, with non-sensical translation of obscured operation infono info pointing out that you must remove the front four screws to slide out the board in order to install batteriescheck your keyer's bag carefully when opening - one of my keyer screws had fallen outcontrary to another review here, the case is not plastic, but aluminum with tiny screwsyou must move a jumper inside in order to mute the keyerthe speed potentiometer has a too high lowend speedno beacon mode that i can telland no straight key support...

Keyer works expected and sounds great, the only problem I have with it , you have to dismantle to change the batteries.

Satisfied

this a wonderful little cw keyer. it works with paddle type of key only. it does not work with a straight key. the product does not come with the 2x aaa batteries it is required. after you open the package, un screw the face plate and very carefully remove the board in the housing. insert the batteries and replace the face plate. if you use the mine key, you will not need to mess with the numbers. to turn off the buzzer, remove the buzzer number. other wise leave it alone. to use the memory function, press the f1 or f2 button and record the message. it is listed in the product description.

Nuce little unit, still learning some tricks but works well. Arrived promptly and happy with thepurchase.

This was obviously a returned item that wasn't checked before sending it to me. The screws were loose, one screw was missing, there were local brand batteries in it (President's Choice), the speed pot was loose, and it came with a completely unrelated piece of plastic, probably from the previous owner. I'm not complaining though because it's cheap, and I bought this to make some mods to it anyway. I replaced the battery holder with a buck converter so I could power it from my transceiver's 12 volt power supply, and removed the internal little buzzer so I could feed the power cable through the hole for that buzzer.The CW keyer works totally fine. I feel that the speed pod works "backwards" (turn counter clock wise to increase speed), so I may modify that too. I bought this to key an old Ten-Tec Corsair that doesn't have a built-in keyer, and it works flawlessly for that.

i used for my hf radio and morse cod works very good i would reckmened it to ham radio who does code very good jim

In all pictures of this keyer, the screws that secure the front and rear panels to the enclosure are Phillips head, #6 or the equivilent JIC head. The screws in the keyer I received are not. They are tiny. How tiny? I have a watchmakers tool set, and the smallest flat-blade screwdriver has a width less than 0.3mm. These screws - flat head, slot-type machine screws, not Phillips dome-head as shown - used on this are even smaller than that tiny watchmakers screwdriver. Since I cannot (at the moment) open the case, I can't install batteries, or find out if this keyer even works. I suppose it's theoretically possible to drill out the installed screws, then enlarge the holes in face- and rear-plate and enclosure, then tap and re-thread the enclosure for a very small machine screw - one that is available. That idea sounds like a really, really bad first step for a brand new item.This thing may as well be welded shut. The pictures are incorrect and misleading. If I cannot find or make a driver to open the case, this item is going back. None of this should be necessary - it's ridiculous.