[Elecraft] USB to Serial adapter for KIO2

[Harry Yingst]

For my use it fits my needs better as I do not plan to use Elecrafts Transverters nor their 100 watt amp remotely.
So it becomes a simpler solution.



      From: Don Wilhelm <donwilh at embarqmail.com>
 To: Harry Yingst <hlyingst at yahoo.com>; Elecraft Email List <elecraft at mailman.qth.net> 
 Sent: Thursday, March 30, 2017 4:30 PM
 Subject: Re: [Elecraft] USB to Serial adapter for KIO2
   
Harry,

OK in broad concept - EXCEPT, things get bogged down in the details:
You will have some problems to solve if using that device.

First of all, the K2 MCU RX and TX signals need to be TTL (0 to 5V) 
instead of RS-232 and the polarity must be inverted - so you will need 
some more logic circuits to make it work.

2nd, the KIO2 provides internal K2 signals needed for Elecraft 
accessories like the KAT100, KRC2, XVseries Transverters.  If you ever 
want to add any of those accessories, you will be back "where you started".

3rd, if you ever add the KPA100, you will have to give up all your work.
Although that device will mount on the KPA100 board, the levels and 
polarity are not right AND it contains ALL the RS-232 signal lines, not 
just TXD and RXD and Signal Ground.  You would have to make extensive 
modifications to the KPA100 board to make it work - and you still do not 
have the internal K2 signal lines to support the external Elecraft 
accessory boxes.

Simple "solutions" are often complex.  It is easier to use an external 
USB to serial adapter IMHO.

73,
Don W3FPR

On 3/30/2017 3:43 PM, Harry Yingst wrote:
>
> Instead of a KIO2 I am installing a DB9-USB-D5-F
>
> USB straight to the K2
>
>
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>
>