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Reviews Categories | Voice Keyers | BX-184 kit Help

Reviews Summary for BX-184 kit
BX-184 kit Reviews: 17 Average rating: 5.0/5 MSRP: $$59
Description: A Voice Keyer kit that fits inside a Yaesu MH-31 mic case.
Product is in production.
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DG1BHA Rating: 5/5 May 3, 2012 13:16 Send this review to a friend
Great kit!  Time owned: more than 12 months
Bought two of these. Easy to assemble, only few through-hole parts to solder. Worked right away and fits perfectly in MH-31 enclosure. Very easy kit and very good modulation on my Yaesu FT-847 and Kenwood TS-2000. My father (DL3BUA) also bought two. One for Yaesu FT-817, one for FT-1000MP. They also work very well. Highly recommended! 73 de Heiko
EA7EE Rating: 5/5 Mar 7, 2012 16:43 Send this review to a friend
Easy, really works  Time owned: 0 to 3 months
I am very happy with the voice keyer. Easy to assemble and perfect performance. SMD components are pre-installed.

In testing I was afraid to hear some background noise during playback. However, the recording will not see any kind of background noise, the record is quite clean. The compressor is permanently ON. Thus, it allows for a little more oomph in the modulation of this Yaesu transceivers wich do not include a suitable compressor. It is not necessary to modify the AGC capacitor, as recommended by the manufacturer produces quite pronounced compression without causing distortion.

The only problem, the FunkAmateur site is in German, the purchasing process in German, promptly response of the FunkAmateur staff in German, sent by FAX credit card data in German, etc.. They Should have a English page to purchase securely via credit card or Paypal. Good thing the google translator works wonderful.

Good update for my FT-817.
N2YTF Rating: 5/5 Sep 5, 2011 08:12 Send this review to a friend
Outstanding, its about time someone designed this!  Time owned: 0 to 3 months
How did Yaesu design the 817 without including a voice keyer?? How did Icom design the IC7000 with a memory keyer that can't repeat on its own??

Thank goodness someone took the time to design something like the BX-184. The BX-184 really is the only easy field voice keyer for rigs that don't have a true built in keyer.

The kit arrived promptly after I ordered it, even though it had to be sent to the US from Germany. I had no trouble understanding the assembly directions, and the kit fit easily into the case of the Yaesu stock mic.

I was impressed with the audio reports I received using the BX-184, and having the luxury of a voice keyer is truly wonderful when using a 5w rig. I have to say, I was a bit nervous when I saw the size difference between the Yaesu stock mic element and the BX-184's tiny element, but all audio reports and my own testing at home have proven to me that the BX-184's element is great.

I plan on experimenting with using the BX-184 as a CW memory keyer by recording CW tones and playing them over SSB using the mic, and I imagine there wont be any problems with this as long as the offsets are set correctly.

One thing that I believe could add to the kit would be a tiny, printable quick reference that could be printed and stuck to the 817 so that in the field the user will never forget how to use the mic, even though using the mic is quite easy.

I hike mountains with my FT817 in the SOTA program, and after a hard hike to a summit, there is nothing better then setting down the rig and letting the voice keyer do the work, especially on some quiet and rarely used band.

I am planning on ordering a second kit in the near future for my Icom 706 MKIIG.
DL3BQA Rating: 5/5 Jun 17, 2011 14:25 Send this review to a friend
Works like a charm  Time owned: 3 to 6 months
Have been lucky to be one of the chosen beta testers before official introduction of the solution in FUNKAMATEUR magazine 2/11. Can only say it works flawlessly with my FT-817. Will work with every other transceiver with 5 V or 7-16 V on mic jacket, too. Easy adaption to used TRX with small jumpers. Nice not to need a separate voicekeyer as I need the mic anyway, hi. Thumbs up for such a well thought and made design. 73s Uwe DL3BQA/DF0TEC/DM0Y
DG2IAQ Rating: 5/5 May 30, 2011 04:26 Send this review to a friend
Great product !  Time owned: 0 to 3 months
Just finished soldering yesterday and did some brief tests on the open case yet.

Everything works fine and sound is great as well. No remarkable difference in audio quality in between the original voice and the recording.

But one thing was never mentioned yet in any publications and you only can find it out by having a closer look to the datasheet of the ISD1760 and the BX-184 schematic:

As the ISD1760 routes the mic audio line all the time, even in non-repeating standby-mode, its AGC works for the normal audio as well !
This is a great side effect as the FT-817/857/897 do not have any internal mic compressor. And their MIC line level setting works AFTER the internal mic amp and cannot prevent distortions on the 1st stage.

I will try to fasten up the AGC time by lowering C8 (4.7µF) as I like fast AGC much more. Let's see if it will work here as well.

But with a proper aligned total audio level, the BX-184 MH-31 is perfect for great audio.

...even if it surely was NOT the origin intention of the designer...hihi.

vy 73,

PE1KL Rating: 5/5 May 24, 2011 06:17 Send this review to a friend
Good product at low costs  Time owned: 0 to 3 months
After a DXpedition into Ghana I decided to buy the BX-184 kit for my FT857D TRX. The construction was easy to do, I did not glue the element into the housing. The element is now secured by a layer of foam. Sound reports are good. Only I need a Dremel for removing some spots on the back of the MH-31 housing. Next DXpedition the BX-184 will accompany me.
N3JON Rating: 5/5 May 13, 2011 07:53 Send this review to a friend
Very Cool!  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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