It works fine and I've switched between it and the stock mic mid QSO without telling anybody and honestly they can't tell the difference and really neither can I. I haven't had any problems with this mic. This mic also has a condenser element rather than the stock mic with its dynamic element. The advantage over the stock mic for the FT-817 is DTMF encoding. Due to the tiny print, it appears as though maybe it should be R117 is a 22k, and R116 is the 33k? Just wanted to confirm before I tore open my $16 Sundely.This really isn't a bad mic. The resistors that are clearly changed for the project appear to be 117 and 116? You mention 118, but R118 is located on the other side of Q101 and is a 10K, and doesn’t indicate a handwritten change. What I am wondering and want to confirm, looking at the schematic, the silkscreen and the documentation, I’m wondering if there is a typo. Of course I have the non s mic, no PTT working Sundely. This one that I picked up had the same issue, so I dove in, thinking that maybe he bought the wrong one. We in fact turned it into an “expensive PTT switch replacement” because of time. Helping another ham in town had previously pointed that out to me. Randy Smith, recently picked up an FT-100, I was aware of the “Sundely MH36” without the S, and the fact that the PTT didn’t work. Thank you in advance for your assistance and your time. Since some hams on e-Bay market short adapter connectors that plug directly into the 6-pin jack and terminate with an 8-contact microphone connector, my guess is that my goal is possible if I know which of the 6 wires to use.Īny help would be greatly appreciated.
#YAESU MH 36E8J SCHEMATIC MANUAL#
The user’s manual does not label them at all, or state the orientation of the (I presume) jack. Another diagram numbers them from 6 to 1 moving in the same direction. One diagram numbers the pins from 1 to 6 moving from left to right. The problem comes with knowing which pins to solder the new mic to. I can make and fit a 6-pin adapter plug into the face of the radio. I thought that Yaesu used only 3 wires for both Mic+, PTT and Gnd (for both Mic- and PTT-). I have spent hours trying to replace the MH-36B6JS with a Shure 527 mic. I, too own a Yaesu FT-100D (actually two) and very much like Shure hand microphones. Hello and Thank You for your interesting (and practical) article. There’s one alternative left: buy the MH-36B6J and use it as an expensive PTT switch replacement part. I tried it myself and ended up sending the item back. I was lucky to find the correct type from an US Ebay seller. If you use VOX, remove this diode and connect the anode side to ground. So buy a MH-36B6J, modify it and off-you-go… Unfortunately this involves two very small SMD resistor replacements, an impossible job without the proper equipment. Note that diode D109 makes the mike mute when PTT is not pressed. I found the following diagram where the author has corrected resistors R116 and R117 to make it work for a FT-100. Googling revealed that the differences lie in some resistor values. The type commonly found cheap on Ebay is MH-36B6J. The FT100 uses the MH-36B6JS mike, and only the FT100 uses this type.
#YAESU MH 36E8J SCHEMATIC UPGRADE#
Alternatively you can buy a new mike from Ebay for little money and upgrade to DTMF along the way (the FT100 was sold in Europe without DTMF mike). One solution is to order a replacement switch from Yaesu, which apparently is still possible (at least in the US). After some Internet research it became clear that this PTT switch failure is a common FT100 failure. Of course, I didn’t expect a switch failure and thought it was RF getting into the transceiver. The PTT switch inside the mike started to act weird, just as I was on holiday and operating /A from Denmark. After updating my FT100, see FT100 MLU, Murphy attacked.