[Motorola] TDN8310A DTMF MaxTrac/Radius Mic Help

[Douglas Fitts W7FDF]

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