Matsutec HP-33A NMEA wiring

JumbleDuck

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In case anyone else makes my mistake ...

When they show pin 3 going to "RS232 TXD" and pin 4 going to "RS232 RXD" they mean "TXD and RXD on the other piece of equipment). The dotted box is a thing, not a cable. NMEA comes out of the HP-33A on pin 4 ("SD" on the diagram, which should probably have been a giveaway).

Twenty minutes to dismantle my beautiful soldered plug (sob) and redo it and my Cobra radio finally know where it is.
 
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