[aprssig] TM-D700 gps connector mod

[Dave Baxter]

Indeed, so they are, my mistook...

73

Dave G0WBX


> -----Original Message-----
> From: Tapio Sokura [mailto:oh2kku at iki.fi] 
> Sent: 01 October 2009 18:06
> To: TAPR APRS Mailing List
> Subject: Re: [aprssig] TM-D700 gps connector mod
> 
> Dave Baxter wrote:
> > Con:	Pin's 1 & 9, Hmmmmm.   Hope nothing clashes when a PC is
> > connected with a 9 way straight cable, and something bangs heads, if
> > that would happen?   Kenwood's serial drivers have not exactly been
> > proved particularly rugged in the past.   Please mark up the back of
> 
> As explained in the document, those are the DCD and RI 
> signals, both are "received" signals from the view of the PC. 
> RS-232 spec requires that all pins tolerate an indefinite 
> shortcircuit up to +/- 25 volts. 
> Unfortunately designers sometimes take shortcuts in their 
> designs. So you still get to keep all the pieces if the magic 
> blue smoke is let out.
> 
>    Tapio
> 
> 
>