Re: Serial Port - DB-9 vs. RJ-45

[N2EY]

Four problems with using an RJ-45 for the port on the K2:

- Only 8 wires
- Not shielded
- Could be mistaken for something else just as easily as a DB-9

And now the big one:

Crimping an RJ-45 plug requires a special tool (mine "only" cost $30), and
the plugs are one-shot items. DB-9 is no harder to solder than a PC board, no
special tool, and you can reuse them.

73 de Jim, N2EY
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[James1787]

Just a quick correction:

Shielded RJ-45 cable and plugs exist and you can purchase them today. I
can't remember, but are all the pins used on the special cable that
connects the KIO2 to the computer? If not, then eight pins are plenty.
Since most everyone doesn't have an RJ-45 crimper - the cables can come
pre-crimped. Just solder the other connector on the other end. 73,
James KB2FCV

-----Original Message-----
From: [hidden email]
To: [hidden email]
Sent: Wed, 21 Jun 2006 19:31:36 EDT
Subject: Re: [Elecraft] Serial Port - DB-9 vs. RJ-45

Four problems with using an RJ-45 for the port on the K2:

- Only 8 wires
- Not shielded
- Could be mistaken for something else just as easily as a DB-9

And now the big one:

Crimping an RJ-45 plug requires a special tool (mine "only" cost $30),
and
the plugs are one-shot items. DB-9 is no harder to solder than a PC
board, no
special tool, and you can reuse them.

73 de Jim, N2EY
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[Bill Coleman-2]

On Jun 21, 2006, at 7:31 PM, [hidden email] wrote:

> Four problems with using an RJ-45 for the port on the K2:
>
> - Only 8 wires
> - Not shielded
> - Could be mistaken for something else just as easily as a DB-9

Don't use it as a serial port -- use it as a 10BaseT connection.
>
> And now the big one:
>
> Crimping an RJ-45 plug requires a special tool (mine "only" cost  
> $30), and
> the plugs are one-shot items. DB-9 is no harder to solder than a PC  
> board, no
> special tool, and you can reuse them.

I just buy pre-fabbed RJ-45 jumpers, the can be found at any computer  
store, and at most better home improvement stores.

Bill Coleman, AA4LR, PP-ASEL        Mail: [hidden email]
Quote: "Not within a thousand years will man ever fly!"
             -- Wilbur Wright, 1901

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