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write your own review of the BX-184 kit.
May 13, 2011 07:53
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Time owned: 0 to 3 months
I have been looking for an easy to use voice keyed for some time to use in pileups and contests.
I found it in the BX-184 kit from Funkamateur Magazine. This inexpensive kit cost 39 Euro ($56 US).
What is unique about it is that it fits inside a Yaesu MH-31 Microphone. It is in a fact a complete replacement mic element and circuit board. If you do not have a MH-31 they can sell you one. The microphone’s center fast scan button turns on the record function for up to a minute. The same button controls playback for one time or a 3, 6 or 10 second repeat. The mic when used as a microphone sounds to my ear like a DX quality mic more like a Heil HC-4 sound then a HC-5 sound.
The input power offers a choice of 5 volts provided on the mic cable on newer Yaesu rigs as well as an 8 to 16 Volt input. The mic plugs straight into my FT-817 but I had to wire up an 8 volt source for my FT-990.
The kit provides for its use with most all rigs and it has a circuit option for use with Icom’s up and down buttons.
At the moment the assembly instructions are in German (English instructions I am told are coming.) There is an instruction supplement available from the kits designer which is all you really need.
Half the board is pre built with surface mount components and you do the rest.
The construction was not too hard. You have to solder a surface mound capacitor on the back of the mic element (easier than I thought). There is a surface mount choke that is easy to damage (as I found out) and I felt it necessary to grind out with my dremel tool some spots on the back of the MH-31 case so it fit tight and did not press on the circuit board. Others have found this not necessary.
The circuit’s designer Oliver Drose patiently answered my questions and provided support. Ordering the kit was not too hard and it came in about a week.
All in all this was a neat kit, fun to build and is just what I was looking for.
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