Hi Greg,  Thanks for all of the comments.  It is just too bad that the cable is the thing that wants to fall apart.   73,Charlie In a message dated 2022-07-29 16:25:20 Eastern Standard Time, ko6th.greg@gmail.com writes:  +1.  I have the same mike and same problem.  I decided to cut the old cable off and splice the new cable into the tail end of the old.  That solved the connector problem, but the rubber grommet thing that "attaches" the cable to the microphone body has disintegrated too, so I've got a big mess there.

Any ideas on a fix would be appreciated.  A 3D-printed plastic part that I could assemble with a traditional (round) grommet or even some electrical tape around the wires would be good, but I can't find an appropriate STL file to print from.

Greg  KO6TH

Charlie Sufana via AMSAT-BB wrote:Hi all,  I know that there are few Yaesu FT-847 owners out there, so these questions are for you.  One of the microphones I have for the radio, the Yaesu MH-36, is literally having the coiled microphone cable's rubber jacket disintegrating.  The replacement microphone coiled cable is no longer available from Yaesu.  Has anyone else experienced this problem?  If so I would be interested in finding out what you did. I am pretty sure I can locate 7 conductor coiled microphone cable and I already have spare microphone plugs but I don't know anything about the 7 pin plug that is on the inside of the microphone housing.  If push comes to shove, I could probably build up a cable if I knew who the female plug manufacturer and model number is or maybe use a small circuit board to develop an interface between the existing wiring and anything new. Any suggestions or help would be most appreciated.  Thanks in advance. 73,Charlie Sufana AJ9NOne of the ARISS mentors -----------------------------------------------------------

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Hi all, Thanks for all of the comments.  Always nice to know who knows what on the AMSAT BB. I have done a bit of research in looking at what is available on eBay.  Everyone needs to be aware that there are different versions of the MH-36 microphone. What I am seeing on eBay are the 6 conductor cables used for the MH-36B6J, MH-36A6J, and MH-36B6JS. The MH-36 I have is the MH-36D8; uses a 7 conductor cable, 8 pin Foster connector at the radio end, and a 7 pin female plug (maybe a Molex connector) at the microphone end.  The MH-31 that I also have uses an RJ-45 at the mic end, 8 pin Foster connector at the radio end, and an 8 conductor cable. That got me to thinking more; what exactly is going on with the two microphones since they both work with the 847.  So I opened up the Foster plugs to see what is what.  It turns out the MH-36D8 is using 7 conductor cable but at the radio end plug, pins 5 and 7 are jumpered together.  Pin 5 is ground and Pin 7 is mic ground.  The MH-31 carries all 8 wires from the radio end plug to the RJ-45 plug at the microphone end. I am seeing on eBay a few cables listed that can be used for the MD-200, MD-100, M-100, YM-48, MH31, MH-31B8, and MH-36D8 that are 8 conductor cables with the mic plug at one end and an RJ-45 connector at the other end.  I now believe the easiest thing to do is put together a small circuit board to act as the interface between the existing wires inside the mic, buy the 8 conductor cable, cut off the RJ-45, connect the new cable to the circuit board, jumper together the wires from 5 and 7 on the circuit board; and use double-sided tape to hold it place.  The other tricky part is to put together some sort of strain relief at the mic end.  I'm still working on that one. Once again, thank you all for your thoughts and comments. 73,Charlie Sufana AJ9N In a message dated 2022-07-29 18:12:07 Eastern Standard Time, amsat-bb@amsat.org writes:  Alan is right.  I bought the MH-36 for the DTMF right after I got the radio with the original MH-31 a zillion years ago.  73,Charlie In a message dated 2022-07-29 16:36:59 Eastern Standard Time, wa4sca@gmail.com writes:

Hi John,

The MH-31 is the supplied microphone, but the manual mentions the MH-36 as an optional replacement if you need DTMF.

73,

Alan

WA4SCA

From: John Sent: Friday, July 29, 2022 15:29 To: aj9n@aol.com; amsat-bb@amsat.org Subject: [AMSAT-BB] Re: Question for other Yaesu FT-847 MH-36 microphone users

Hi Charlie,

It’s a known issue, and happens a lot. The cables don’t age well, and the jacket degrades on them.

Are you sure the MH-36 is designed for your FT-847 though? That looks like the wrong microphone (it looks like a mobile microphone for the VHF/UHF mobile radios).

The MH-31 is the recommended hand microphone for the FT-847, I believe. It has a detachable cable, with an RJ45 socket on the microphone end. The other end can either be an RJ45 (for radios like the FT817/857/897) or an 8 pin round Foster connection (for radios like the FT-847). The same cable (RJ45 on one end, Foster on the other) should still be available for multiple Yaesu desk microphones (from the MD-100 onwards, at the very least).

From a quick look on eBay, the cables available for the MH-36 are all 6-pin RJ12 connections on the radio end (which confirms my theory that this microphone is designed for the mobile rigs), so you’re likely looking at buying one of those, cutting the end off and soldering a Foster plug on it, though with it being an electret microphone (if memory serves me), you’ll need to figure out how to get some bias voltage across the element.

I’m fairly certain you’d have a lot more luck with an MH-31 with the appropriate cable, or possibly the MH-59 DTMF microphone from the FT817/857/897. However…

A quick google also revealed this: https://k8daa.groups.io/g/k8daa/topic/yaesu_ft847_dtmf_mic/78966465

This details the mod required to make your own cable for the MH-36D. It might help you out a bit.

73,

John (M5ET)

From: Charlie Sufana via AMSAT-BB amsat-bb@amsat.org Sent: 29 July 2022 21:06 To: amsat-bb@amsat.org Subject: [AMSAT-BB] Question for other Yaesu FT-847 MH-36 microphone users

Hi all,

I know that there are few Yaesu FT-847 owners out there, so these questions are for you.  One of the microphones I have for the radio, the Yaesu MH-36, is literally having the coiled microphone cable's rubber jacket disintegrating.  The replacement microphone coiled cable is no longer available from Yaesu.  Has anyone else experienced this problem?  If so I would be interested in finding out what you did.

I am pretty sure I can locate 7 conductor coiled microphone cable and I already have spare microphone plugs but I don't know anything about the 7 pin plug that is on the inside of the microphone housing.  If push comes to shove, I could probably build up a cable if I knew who the female plug manufacturer and model number is or maybe use a small circuit board to develop an interface between the existing wiring and anything new.

Any suggestions or help would be most appreciated.  Thanks in advance.

73,

Charlie Sufana AJ9N

One of the ARISS mentors

-----------------------------------------------------------

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-----------------------------------------------------------

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Hi Charlie,

Did you get to the end of my message and check the URL I pasted there? It answers everything you’re asking…

73,

John (M5ET)

From: aj9n@aol.com aj9n@aol.com Sent: 29 July 2022 21:45 To: john@amber.org.uk; amsat-bb@amsat.org Subject: Re: [AMSAT-BB] Question for other Yaesu FT-847 MH-36 microphone users

Hi John,

Yes the MH-36 is meant to be used with the FT-847. It is a hand-held mic with the touch-tone buttons. Actually the model is a MH-36D8 (at least that is what the manual on page 4 calls it). I also have the MH-31 microphone that I normally use for my ARISS contacts when I am the control operator. But it is the MH-36 with the 7 conductor cable that I am need of suggestions on how to replace the cable.

The MH-36 does not have an external plug on the end of the cable at the microphone end. There is a 7 pin female type plug that I think might be some model of a Molex plug that is internal inside the microphone housing that I would love to get the model number for if I am forced to rebuild the cabling. The alternative I am thinking is to use a small piece of circuit board that already has the holes in it as a terminal strip and use the existing wiring to the 7 pin plug.

Thanks for the reply.

73,

Charlie AJ9N

In a message dated 2022-07-29 16:28:35 Eastern Standard Time, john@amber.org.uk mailto:john@amber.org.uk writes:

Hi Charlie,

It’s a known issue, and happens a lot. The cables don’t age well, and the jacket degrades on them.

Are you sure the MH-36 is designed for your FT-847 though? That looks like the wrong microphone (it looks like a mobile microphone for the VHF/UHF mobile radios).

The MH-31 is the recommended hand microphone for the FT-847, I believe. It has a detachable cable, with an RJ45 socket on the microphone end. The other end can either be an RJ45 (for radios like the FT817/857/897) or an 8 pin round Foster connection (for radios like the FT-847). The same cable (RJ45 on one end, Foster on the other) should still be available for multiple Yaesu desk microphones (from the MD-100 onwards, at the very least).

From a quick look on eBay, the cables available for the MH-36 are all 6-pin RJ12 connections on the radio end (which confirms my theory that this microphone is designed for the mobile rigs), so you’re likely looking at buying one of those, cutting the end off and soldering a Foster plug on it, though with it being an electret microphone (if memory serves me), you’ll need to figure out how to get some bias voltage across the element.

I’m fairly certain you’d have a lot more luck with an MH-31 with the appropriate cable, or possibly the MH-59 DTMF microphone from the FT817/857/897. However…

A quick google also revealed this: https://k8daa.groups.io/g/k8daa/topic/yaesu_ft847_dtmf_mic/78966465

This details the mod required to make your own cable for the MH-36D. It might help you out a bit.

73,

John (M5ET)

From: Charlie Sufana via AMSAT-BB <amsat-bb@amsat.org mailto:amsat-bb@amsat.org > Sent: 29 July 2022 21:06 To: amsat-bb@amsat.org mailto:amsat-bb@amsat.org Subject: [AMSAT-BB] Question for other Yaesu FT-847 MH-36 microphone users

Hi all,

I know that there are few Yaesu FT-847 owners out there, so these questions are for you. One of the microphones I have for the radio, the Yaesu MH-36, is literally having the coiled microphone cable's rubber jacket disintegrating. The replacement microphone coiled cable is no longer available from Yaesu. Has anyone else experienced this problem? If so I would be interested in finding out what you did.

I am pretty sure I can locate 7 conductor coiled microphone cable and I already have spare microphone plugs but I don't know anything about the 7 pin plug that is on the inside of the microphone housing. If push comes to shove, I could probably build up a cable if I knew who the female plug manufacturer and model number is or maybe use a small circuit board to develop an interface between the existing wiring and anything new.

Any suggestions or help would be most appreciated. Thanks in advance.

73,

Charlie Sufana AJ9N

One of the ARISS mentors

Thanks for the eBay link.  I will take a look.  73,Charlie In a message dated 2022-07-29 17:21:29 Eastern Standard Time, kc5qbc@swbell.net writes:   MH36ds is the dtmf mike for the 847. Complete mikes with cable are available on ebay except it will have the rj45 end which you simply chop off and add the correct 8pin round connector.mh-36 in Radio Communication Electronics: Search Result | eBay   | | | |   |   |

|

| | | | mh-36 in Radio Communication Electronics: Search Result | eBay

Get the best deals for mh-36 at eBay.com. We have a great online selection at the lowest prices with Fast & Free... |

|

|

On Friday, July 29, 2022 at 03:29:12 PM CDT, John john@amber.org.uk wrote:   Hi Charlie,

It’s a known issue, and happens a lot. The cables don’t age well, and the jacket degrades on them.

Are you sure the MH-36 is designed for your FT-847 though? That looks like the wrong microphone (it looks like a mobile microphone for the VHF/UHF mobile radios).

The MH-31 is the recommended hand microphone for the FT-847, I believe. It has a detachable cable, with an RJ45 socket on the microphone end. The other end can either be an RJ45 (for radios like the FT817/857/897) or an 8 pin round Foster connection (for radios like the FT-847). The same cable (RJ45 on one end, Foster on the other) should still be available for multiple Yaesu desk microphones (from the MD-100 onwards, at the very least).

From a quick look on eBay, the cables available for the MH-36 are all 6-pin RJ12 connections on the radio end (which confirms my theory that this microphone is designed for the mobile rigs), so you’re likely looking at buying one of those, cutting the end off and soldering a Foster plug on it, though with it being an electret microphone (if memory serves me), you’ll need to figure out how to get some bias voltage across the element.

I’m fairly certain you’d have a lot more luck with an MH-31 with the appropriate cable, or possibly the MH-59 DTMF microphone from the FT817/857/897. However…

A quick google also revealed this: https://k8daa.groups.io/g/k8daa/topic/yaesu_ft847_dtmf_mic/78966465

This details the mod required to make your own cable for the MH-36D. It might help you out a bit.

73,

John (M5ET)

From: Charlie Sufana via AMSAT-BB amsat-bb@amsat.org Sent: 29 July 2022 21:06 To: amsat-bb@amsat.org Subject: [AMSAT-BB] Question for other Yaesu FT-847 MH-36 microphone users

Hi all,

I know that there are few Yaesu FT-847 owners out there, so these questions are for you.  One of the microphones I have for the radio, the Yaesu MH-36, is literally having the coiled microphone cable's rubber jacket disintegrating.  The replacement microphone coiled cable is no longer available from Yaesu.  Has anyone else experienced this problem?  If so I would be interested in finding out what you did.

I am pretty sure I can locate 7 conductor coiled microphone cable and I already have spare microphone plugs but I don't know anything about the 7 pin plug that is on the inside of the microphone housing.  If push comes to shove, I could probably build up a cable if I knew who the female plug manufacturer and model number is or maybe use a small circuit board to develop an interface between the existing wiring and anything new.

Any suggestions or help would be most appreciated.  Thanks in advance.

73,

Charlie Sufana AJ9N

One of the ARISS mentors

-----------------------------------------------------------

Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/

View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org

Thanks Bruce, I will take a look.  73,Charlie In a message dated 2022-07-29 17:54:40 Eastern Standard Time, bruce@perens.com writes:  Both the complete MH-36 and the cable are available on eBay. I suppose they might have held up better in storage, even if they are old stock.     Thanks     Bruce On Fri, Jul 29, 2022 at 1:06 PM Charlie Sufana via AMSAT-BB amsat-bb@amsat.org wrote: Hi all,  I know that there are few Yaesu FT-847 owners out there, so these questions are for you.  One of the microphones I have for the radio, the Yaesu MH-36, is literally having the coiled microphone cable's rubber jacket disintegrating.  The replacement microphone coiled cable is no longer available from Yaesu.  Has anyone else experienced this problem?  If so I would be interested in finding out what you did. I am pretty sure I can locate 7 conductor coiled microphone cable and I already have spare microphone plugs but I don't know anything about the 7 pin plug that is on the inside of the microphone housing.  If push comes to shove, I could probably build up a cable if I knew who the female plug manufacturer and model number is or maybe use a small circuit board to develop an interface between the existing wiring and anything new. Any suggestions or help would be most appreciated.  Thanks in advance. 73,Charlie Sufana AJ9NOne of the ARISS mentors -----------------------------------------------------------

Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/

View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org

-- Bruce Perens K6BP