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| Reviews Summary for Rework Eliminator™ K2 Internal Mic Adaptor |
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Reviews: 9
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Average rating: 5.0/5
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MSRP: $21.95
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Description: The Rework Eliminator™ K2 Internal Mic Adaptor is an assembly composed of two tiny multi-layer circuit boards that fits behind the K2’s Front Panel. It has a configuration jumper block that is easily accessible by removing just the left side panel of the K2 enclosure. The adaptor supports more than 40 microphones, including most offered by Icom, Kenwood, and Yaesu. Features include: jumper selectable bias resistance, gold plated contacts, RoHS compliance, and dual PCB ground planes.
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More info: http://www.unpcbs.com/
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W8GX
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Rating: 5/5
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Jan 30, 2010 18:00
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Perfect solution!
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Time owned: 0 to 3 months
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A perfect solution to the problem of adapting other microphones to the K2! It took only a short time to build and install into my K2. I will never have to hardwire the K2 for different mics. Just change a few jumpers! THATS ALL! A perfect solution! Get one!
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AL7B
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Rating: 5/5
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Jan 30, 2010 15:22
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Slick!
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Time owned: 0 to 3 months
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This will be an improvement to any K2, even if it is not currently equipped for SSB operation. A future owner of the K2 will thank you and the increased resale value with the IMA would easily recover the minor cost.
The boards and components are top notch with the traces and silk screening resembling what is used by Elecraft. All connectors and jumpers are gold plated.
Making changes to the K2 microphone configuration requires a simple removal of the left panel. The IMA folds the jumper connections for access from the side and also includes several biasing resistor options. A nicely done sticker is include that can be applied to the inside of the left panel to simplify future microphone changes.
Ken and Gary of Rework Eliminators are very accessible often replying to e-mails within minutes and the documentation outstanding.
I recommend this option be installed in any K2 whether configured for SSB or not. It just makes total sense to eliminate possible damage to the K2 when making microphone changes. These changes cannot be tested without reassembly of the radio.
Changes with the IMA only requires moving simple jumpers, with guidance from the great documentation.
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DF7TH
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Rating: 5/5
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Jan 16, 2010 07:04
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Excellent addition to a K2SSB
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Time owned: more than 12 months
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This is an excellent addition should you own or build a SSB capable K2. Espesially when wanting to reuse an existing MIC or even more useful when trying out different mics to see what suits best this configuration adapter is very handy !
Moreover it's a very small and neat looking and superb quality art work once assembled.
Provided you carefully follow the 1st class user's guide available on their WEB-site there's nothing you can do wrong assembling it and you can freely configure or reconfigure your microphone configuration after removing the left side panel of your K2. No boards to be removed, no soldering, no additional resistor mounting anywhere. VERY NEAT !
All there is to know about (i.e. limitations with newer Alinco Mics) can be found on their WEB site or in the comprehensive User's Guide available there. You can buy after verifying it actually suits your needs rather than finding that out later.
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AC6YO
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Rating: 5/5
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Mar 3, 2008 17:03
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Easy mike access
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Time owned: 0 to 3 months
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If you plan to use a mike with your k2 then this adapter is for you. Easiest to install if you have
not soldered the jumpers on the mike jumper plug,
but if you have just remove the jumpers and clean the solder off and install the adapter. The adapter
jumpers can be adjusted just by taking the k2 side panel off. Information in the kit also gives info
on the jumpering for lots of mikes.
You will like the Internal Mic Adapter.
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VK3DAP
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Rating: 5/5
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Jan 2, 2008 11:25
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Very useful product, superb documentation, good price
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Time owned: 0 to 3 months
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After I finished assembling my Elecraft K2 I thought that this rig had everything. Until I wanted to plug in different mics! I found that the DIL plug and jumpers on the FP board a bit limiting when trying to use different mics, like my ICOM SM5. To get this mic to work involved soldering an 820 ohm resistor between a couple of pins, soldering a jumper between another couple and adding a longer, wire link between two more non-adjacent pins.
Then I found the unpcbs.com site and their Internal Mic Adapter product. I read the documentation, and when the XYL was not looking, pledged my plastic. The kit arrived yesterday, and was duly assembled.
I looked up the ICOM SM5 mic, found the configuration diagram in Table 3, plugged jumpers into the IMA board accordingly, switched on the rig and, running 12 watts into a dipole on 40 metres, immediately had a QSO with a station in Central Queensland, about 2000 km away. He reported that the audio was very smooth and clear.
I would recommend this product as being the answer to the problem of using any one of a large number of microphones with the Elecraft K2.
The product is ingenious, it neatly solves a difficult problem, the PC boards are well designed, and the documentation which accompanies this product is superb - clearly written with excellent diagrams.
I gave this product a rating of 5 because, honestly, I could not find a fault with it, and it is an elegant solution to the problem.
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W7GH
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Rating: 5/5
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Oct 30, 2007 01:19
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clever product adds flexibility to your K2
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Time owned: 0 to 3 months
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I'm new to SSB. I had no idea what mic would work best with my voice and the K2. I wasn't sure if I should wire my K2 for the old mic that someone gave me, or wire it for an Elecraft mic, or wire it for whatever is popular on the reflector. I bought the Internal Mic Adaptor, and now there is no problem. I can reconfigure my K2 for just about any mic in two minutes.
Ken and Gary have done it again. It's really amazing how their latest product makes the most of a narrow space. It's very clever how almost any mic can be wired by rearranging the jumpers. As usual, the documentation is excellent, both in the manual and in the web site. A great addition to any K2 used with SSB!
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KC9ORD
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Rating: 5/5
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Oct 13, 2007 07:38
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This high quality kit saves time and ware & tear on the K2
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Time owned: 0 to 3 months
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In the process of building my K2 I decided to add the Rework Eliminator IMA and what a great decision that was! It will be a while before I settle on a microphone and this 30 minute build will save a ton of time as well as ware and tare on the K2 . Good quality components and clear instructions make the IMA a no-brainer.
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WA6VNN
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Rating: 5/5
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Sep 9, 2007 20:01
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Rework Eliminator's K2 Internal Mic Adaptor
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Time owned: 0 to 3 months
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I just finished assembling and installing the K2IMA produced by Rework Eliminator (http://www.unpcbs.com/) on my K2/100 (sn 4887) and I'm thoroughly delighted with the results. I assembled the parts using a small vice and my trusty old Weller MP-107 soldering iron. After assembling the module it took about 15 minutes to attach it to the existing mic header connectors on the K2 Control Board. Within less than 20 minutes I was able to reassemble the K2/100 and test configurations for over half a dozen mics, every one working the first time. I hold this due to the excellent documentation for mic coinfiguration that is included with the IMA. Mics tested included some old and some new: Elecraft/Heil Proset-K2, Icom HM-12 and HM-14, Yaesu MH-1B, and an old Alinco EMS-10 (same wiring as EMS-5A.) It takes less than a 2 minutes to pop the side cover off, configure the jumpers, replace the cover and swap the mics. 73 - Al WA6VNN
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W3DVX
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Rating: 5/5
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Sep 9, 2007 10:30
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IMA is useful product for the Elecraft K2
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Time owned: 0 to 3 months
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If you have an Elecraft K2, and several microphones, then this Internal Mic Adaptor (IMA) is for you. Even if you don't have any mic at the moment, the IMA will give you flexibility to choose something later.
The problem with the K2 is that you need to take out the control board and remove the front-panel assembly each time you change mics. Then you set jumpers and solder in the proper bias resistor if required. When I build a K2, I normally set it up with the Elecraft default: jumpers straight across and a 5.6K resistor. Other configurations I connect using wire-wrap from pin-to-pin as needed ... and perhaps change the resistor. Changing mics is not something you would want to do frequently, if at all.
The better way is this IMA ... it's installed once (easily), and when you want to use a different mic, all you do is take off the left-side cover to reach the IMA jumpers. The jumpers configure both the mic pin-outs and the bias resistor.
The two IMAs that I built so far took less than half an hour each to put together. A very small soldering iron and very thin solder is required, especially for the surface-mount socket that fits over the Elecraft jumper block. The product quality is excellent.
It works as advertised, at least on the two mics that I normally use here: the Elecraft MH2 and the Icom HM-36. I can now change mics in minutes without the hassle. Having a handy printout of the on-line user guide helps when selecting the proper jumper settings.
If there's a downside to the IMA, I should probably mention that those jumpers aren't very big, and you want to avoid dropping one on the floor! The extended end of each jumper can be grasped most easily with small needle-nose pliers for changing the settings.
As a builder of many Elecrafts, I can easily recommend this product to my clients. It's worth the twenty-something dollars for the flexibility. Visit the IMA website and take a closer look ... it might be just the product you need for your K2.
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