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The Daniels MT-2 VHF Transmitter Module
By David VanHorn   KC6ETE
 

Connecting the Daniels MT-2 VHF Transmitter modules:

The "D" column is not connected. I would not say that it is safe to make connections to those pins though, just that the manual does not list any connections to them. "No connection" and "DONT CONNECT" aren't the same thing.

The VHF and UHF modules show identical connections.

The rear panel connector is a DIN standard connector, with three columns of even numbered pins, numbered from 1 to 32.
The three columns are labeled on the connector, "D", "B", and "Z", at the top. The pins are numbered on the right side, but only the rightmost digit shows, so you see this:

D B Z
OOO
OOO
OOO
OOO
OOO
OOO
OOO
OOO
OOO
OOO
OOO
OOO
OOO
OOO
OOO
OOO
Row Number
2
4
6
8
0 (should be 10)
2 (should be 12)
4 (should be 14)
6 (should be 16)
8 (should be 18)
0 (should be 20)
2 (should be 22)
4 (should be 24)
6 (should be 26)
8 (should be 28)
0 (should be 30)
32

Power to the transmitter module is the same as the receiver modules, with the addition of a 12V input on pins B2 and Z2.
All the input pins have EMI filter networks that consist of a series inductor and 330pF cap to ground.

Control signals are all low true, so you ground KEY to transmit, and COR goes low to indicate presence of a signal.

FunctionPin(s)Comment
GroundB30,Z30,B22,Z22 
+9.5V inB6, Z6 
B-SystemB16,Z16Jumper inside the RX connects this point with B6,Z6
6.0Vdc outZ4 
+12V inB2,Z23A fast blow fuse inside module
TXAudioB20Unbalanced input
TX Audio EnableB12,Z12Runs to jumper JU2 where you can connect this signal to the transmitter, or just ground this line into the transmitter. Grounding this line enables the audio
PTT no time outB14,Z14Ground to transmit, timeout set by jumper selection
Line InB18 to Z18Optional balanced audio input, if you have this, you'll see a quarter-sized transformer on the PCB
Tone/Digital inputZ20Looks like an unfiltered/limited input for DPL or data?
Subtone inputB22CTCSS input
PTT with timerB10,Z10Ground to transmit.

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This page last updated 01-June-2005

This web page, this web site, the information presented in and on its pages and in these modifications and conversions is © Copyrighted 1995 and (date of last update) by Kevin Custer W3KKC and multiple originating authors. All Rights Reserved, including that of paper and web publication elsewhere.