[Motorola] TDN8310A DTMF MaxTrac/Radius Mic Help

[Charles H. Emely]

Doug

Have you been able to get Maxtracs down to the ham band on 900??

If so, please let me know how.  We have tried almost everything.

Chuck
W1NW
chemely@cbc.org
----- Original Message -----
From: "Douglas Fitts W7FDF" <w7fdf@cox.net>
To: <motorola@mailman.qth.net>
Cc: <mc@sover.net>
Sent: Sunday, December 29, 2002 6:12 PM
Subject: Re: [Motorola] TDN8310A DTMF MaxTrac/Radius Mic Help


> Hi Michael:
> First, here is the exact Motorola part number for the TDN8310A and other
> DTMF type mics: Instruction Manual#68R80309C84-C  series 11/94. Let me
scan
> the page that shows the exact location for a specific jumper [JU-3] which
> determines  a "timed" DTMF event or a "continuous" DTMF tone sequence. We
> cannot include attachments in this email so I will send the file to your
> email address direct. Hope this helps. Our repeater group Users [Pima
Radio
> Network] use the same 8310A mic on our Maxtrac "modified" 900 mhz mobile
> rigs and I personally changed the jumpers on all our microphones. FYI: for
> a timed DTMF event jumper goes to position *B*. For continuous DTMF the
> jumper goes to position *A*.
>
> Standby.....let me go to the "family" PC station and scan the page.
>
> Doug W7FDF
> http://www.geocities.com/pimaradio/
>
>   12/29/02 -0500, you wrote:
>
> >I have one of these fine items which I use with my MaxTrac UHF
> >radio.  I am having a problem converting it to provide a tone for
> >the duration the key is pressed from its' present state which is timed
> >tone operation.
> >
> >
> >I have been able to find the tone logic board schematic and layout for
> >the VLN1017A DTMF microphone for the MCX1000 which
> >shows a jumper(JU3)  that controls this parameter.
> >However they are close but not the same.  Can anyone please help me
> >determine the location of this jumper?  I can't seem to find it on
> >my mic's tone logic board.
> >
> >
> >TIA,
> >
> >
> >73,
> >
> >
> >Michael
> >
> >W1RC
> >
> >
> >mc@sover.net
>
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