[1000mp] Shure 444d to 1000mp

[Bill Scurlock]

Hi Greg.

>From my 1000MP drawings it appears that Yaesu is similar to Kenwood in that 
the mic ground is carried separately from the main radio chassis ground.  On 
the 1000MP, mic ground is pin 7, and the main chassis ground is pin 5 on the 
connector.  So the radio is looking for a 4 wire mic connection.  The Shure 
444 series of mics is a 3 wire system with one common ground/shield for both 
the mic "hot" and the PTT circuits.  So you will have to select one of the 
two connection points for the single ground conductor coming from the Shure 
444.  I did this a few years ago with a Shure 444 connected to a Kenwood 
Radio and it worked fine with no audio problems at all.  I sold the mic a 
while back so I can't check and tell you for sure which ground I selected, 
but I'm fairly certain it was the main radio chassis ground on the mic 
connector because I don't think the PTT ground return should be connected to 
the isolated mic ground return.  Everyone who uses the Shure 444 mic with 
modern day radios has crossed this bridge before, so surely someone that 
remembers for sure what they did will respond to your email.

Also, check out the slide switch on the bottom of the mic stand and make 
sure it is not causing a problem.  Mine was not making good connection, so I 
just wired around it and did not use it because I didn't need the function.

It's worth figuring out because the 444 is an excellent communication mic 
that will really punch through the QRM and noise.  Good Luck.

73, Bill, K5GCW
----- Original Message ----- 
From: "Greg Mason" <masongregc43 at yahoo.ca>
To: <1000mp at mailman.qth.net>
Sent: Sunday, August 26, 2007 10:12 AM
Subject: [1000mp] Shure 444d to 1000mp


OK, I'm stumped. After trying twice to connect a Shure 444D to my 1000mp I 
need help. I have the pinout, and just need some advice on how to connect 
the mike. Thanks. PS, these 8 pin connectors are a real pain with my big 
hands and weak eyes.

Greg VE4AMN


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