[Elecraft] WRONG SERIAL CABLE - Possible fix

Mon Dec 22 08:53:01 2003

Folks,

The light just dawned for me - pin 4 of the DB9 connector is not used.
Let's use that pin as a keying device.  Put a plug into pin 4 on the chassis
mounted female connector, and remove pin 4 from the male shell.
It is not hard to implement and would prevent plugging a standard serial
cable into the K2.

Elecraft already has a part number for plugs that would work - one (actually
2) is already supplied with the KPA100 for keying the connector on the
Control Board - part number is E700065.  I can't locate my extra one right
now to see if it fits, does anyone else have one who could test it for
proper fit (tight enough so it will not come out)?

Wayne and/or Eric, what is the possibility that a couple extra keying pins
could be included with the KIO2 (and KPA100) and the manuals updated -
likely with eratta pages?

73,
Don W3FPR

----- Original Message -----
From: "Thomas Beaudry" <[email protected]>
To: <[email protected]>
Sent: Monday, December 22, 2003 6:31 AM
Subject: Re: [Elecraft] WRONG SERIAL CABLE - If you've done this, please
reply

> Another solution is to change the polarity of the connector on the K2.
> None of my computer serial cables have a female connector at both ends
> so I can't use one of them by mistake.
>
> > Better yet would be a mod inside the K2 or in a cable adapter
> > that protects the K2 from such damage.
>