[Elecraft] K2/100 RS232 trouble

[Andy McMullin]

Bo,

You are using the special RS232 cable aren’t you? You must connect with a cable matching the special pinout first. If you try a straight connection it will fail.

Try the K2 and its cable into an interface unit such as the Modular Technology interfaker (like https://www.ebay.co.uk/itm/224519972647 <https://www.ebay.co.uk/itm/224519972647>) or something smaller such as https://cpc.farnell.com/pro-signal/t-mb460p/rs232-check-tester/dp/CS11237?ost=pro+signal+t-mb460 <https://cpc.farnell.com/pro-signal/t-mb460p/rs232-check-tester/dp/CS11237?ost=pro+signal+t-mb460> 

Check you have enabled the necessary handshake pins, and are receiving the same from the USB interface.

Hope this helps
Andy


> On 10 Sep 2021, at 12:38, <bo.andersson at ingbo.se> <bo.andersson at ingbo.se> wrote:
> 
> 
> 
> Hi
> 
> 
> 
> RS232 does not work to K2 / 100 via usb.
> 
> Have tested various rs232 / usb adapters, also brand new.
> 
> The correct values ​​are entered in the computer for the port.
> 
> All measured values ​​of U4 MAX1406 are according to Table 4 IC DC voltage chart.
> 
> Has also changed U4 to a new one.
> 
> Is it the control board on K2 that is faulty?
> 
> How do I investigate this?                     
> 
> SM6FPG/Bo
> 
> 
> 
> 
> 
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