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ICom headset adapter

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eschlanser(at)yahoo.com
Guest

Posted: Sat Mar 28, 2009 12:07 pm Post subject: ICom headset adapter

I have a hope that the list can help me find or fabricate a replacement for the headset adapter for my ICom A-5 handheld radio. The problems include an overpriced replacement available from ICom and the lack of a push to talk switch plug in the aftermarket headset adapters for electronics. 

Thanks, Eric

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Radioflyer

Joined: 04 Feb 2009
Posts: 43
Location: Boston

Posted: Sun Mar 29, 2009 8:24 am Post subject: Re: ICom headset adapter

I only have an IC-A22, but if the IC-A5 is similar, and I believe it is exactly the same, it would be easy to make up your own headset/mic patch cable. The toughest part will be locating the mini phono-plugs and jacks, especially the mic jack. You'll probably have to order the mic jack from B&C or Steinair. So, new parts alone can easily cost about $20.



Here is what I think is done. Two mini phono-plugs go into the A5. The fatter plug (.136" OD) is wired to a headset jack. Sleeve to ground and ring to audio. The thinner plug (.098" OD) is wired to a mic jack. Sleeve to ground, ring to mic audio, and tip is used for mic key (i.e., PTT switch). If you need to use a remote PTT switch, just wire a SPST switch from the mic "tip" to the mic "sleeve". However, be aware that if you don't wire-in a remote PTT switch, you can still "key" the mic by pushing the transmit button on the A5.



--Jose

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eschlanser(at)yahoo.com
Guest

Posted: Fri Apr 03, 2009 9:12 am Post subject: Icom headset adapter

 	  Quote: 	
		   	  Quote: 	
		  Jose, Thanks for the reply. The Icom A-5 and 6 are basically the same. The 3.5mm 4-conductor plug that connects at the radio has gone bad. The large plugs that you describe are OK. I have managed to locate the 3.5mm 4-conductor plug. It is Calrad part no. 30-701. My next problem will be wiring it up. There are 4 wires that go into it. What is the order for wiring this plug? 

Eric

<Time: 09:27:33 AM PST US

<Subject: Re: ICom headset adapter

<From: "Radioflyer" <skyeyecorp(at)airpost.net>

<I only have an IC-A22, but if the IC-A5 is similar, and I believe it is exactly

<the same, it would be easy to make up your own headset/mic patch cable. The

<toughest

<part will be locating the mini phono-plugs and jacks, especially the mic

<jack. You'll probably have to order the mic jack from B&C or Steinair.

<So,

<new parts alone can easily cost about $20.



<Here is what I think is done. Two mini phono-plugs go into the A5. The fatter

plug

<(.136" OD) is wired to a headset jack. Sleeve to ground and ring to audio.

<The thinner plug (.098" OD) is wired to a mic jack. Sleeve to ground, ring

<to

<mic audio, and tip is used for mic key (i.e., PTT switch). If you need to use

<a remote PTT switch, just wire a SPST switch from the mic "tip" to

<the mic "sleeve".

<However, be aware that if you don't wire-in a remote PTT switch, you can

<still "key" the mic by pushing the transmit button on the A5.



<--Jose

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http://forums.matronics.com/viewtopic.php?p 36669#236669

	
	


         [quote][b]

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special4

Joined: 27 Sep 2006
Posts: 28

Posted: Sun Apr 05, 2009 5:31 pm Post subject: Re: ICom headset adapter

Eric,



A-5 connector (3.5 mm 4 pin):  1)  speaker  2) MIC 3) PTT 4)GND

I hope this helps.



Peter

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