RS232 voltage level converter box
steve at radiorobots.com
Sun Nov 16 14:34:06 CST 2008
Michael B. Brutman wrote:
> I came across something strange that I need some help with. Pictures
> are here:
> It looks like a converter box that takes TTL level serial signals and
> converts to RS232 levels, kind of like the MAXIM single chip solution
> except that it is using 1488 and 1489 chips.
> The problem is that it came with a PCjr, but it doesn't physically
> plug into a PCjr. The onboard serial port is only 16 pins, while the
> rectangular connector here is 20 pins. It physically doesn't work.
> Does anybody know another machine or card that might have used the 20
> pin header for a serial port? I'm almost thinking that I'm missing
> another piece (a card internal to the machine) that the header goes to.
Might be TTL/232 converter for a HAM rig, specifically Kenwood TS-930 or
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