(JDI), a Taiwan manufacturerĤF., No.3, Ln. Yaesu USA Product Page : FTM-400DR, 144/430 MHz Dual Band Transceiver I feel bad my little Yaesu VHF/UHF rigs now that I think about it. I do notice that at least the new FT891 and the FT991/A accept the 600 ohm mics - which is great! You'd think with FM you'd want the cleanliest possible sound too. which is quite interesting.įTW, most of my traffic nets are on 2m/70cm. I do see that some of the other manufacturers like Kenwood use the standard 600 ohm mic impedance for their VHF rigs. I cannot believe that the newer rigs still want 2k ohms.! Why not make it a standard 600 ohm? Then again, that's like asking manufacturers to make a standard mic jack. Good thing I ran across this thread or else I'd be eating my Heil. It's too bad, because I've got a couple modern VHF/UHF Yaesu rigs that I was going to use my Heil with. The modern Yaesu VHF rigs have ~2000 ohm specs for the mic input, so the mic and adapters I recommended will not work.
I hate Yaesu's naming conventions lately. Oops, sorry, I thought the OP had an FT100D.
99 cent electret cartridge will actually sound incredible on those 2.2k impedance radios! So I guess if you can fabricate a shell/stick to mount it on, you have yourself a desk mic. Pin 4 is a control line "common" but it is isolated from chassis ground.
not connected to negative DC supply/chassis. That will work if the mic is adjusted properly, it's absolutely silly ~ a three stooges approach to a TX audio problem, nonetheless it'll work! An interesting observation of the mek-2 is that they mislabel pin 4 as ground, it's NOT ground ~ i.e. You can get a switchable impedance desk mic (and I haven't tried that yet) but you'd likely have to "eat" the mic cartridge to get any output from it! So where are these mystery mics Yaesu? This leaves only one viable option of using an amplified desk mic to compensate for the impedance mismatch etc. Nearly all desk mics for modern communications gear are 600 dynamic mics.
Great radio and I love Fusion but could ya just make a complementary desk mic already! I am having the same issues regarding my ftm400dxr. Yaesu sells the mek-2 8-pin round to modular adapter yet offers no plug-n-play desk mic for their mainstream mobiles? Yet they indicate that the adapter will allow a variety of mics to be used. The newer mobiles are typically 2.2K ohm electret and the Md100 mic is a dynamic 600 ohm. The MD100/200 desk mic will NOT work on ANY of the "newer" Yaesu mobile radios due to the impedance mismatch.
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