CIRRO MAZZONI BABY LOOP ANTENNA

[KK2L]

CONTENTS DELETED

The author has deleted this message.

[Don Wilhelm]

Mark,

You will likely have to gain access to a full RS-232 port by using a USB
to serial adapter.  Connect that to an RS-232 "Y" cable.  One side of
the "Y" connects to the RS-232 of your loop antenna, and on the other
side of the "Y" connect to your KX3 using the KXSER cable from Elecraft
- or alternately, build your own KXUSB using the schematic shown in the
back of the Elecraft XG3 manual (download it from Elecraft).

Make certain your loop controller only listens to the RS-232
communications.  If there are RS-232 drivers in the controller, they
must be disabled (not just turned off, but disabled by disconnecting
them or disabling them by the use of Tri-State output devices.

73,
Don W3FPR

On 4/21/2019 12:53 PM, KK2L wrote:

> Good Afternoon All,I have a Cirro Mazzoni Baby loop antenna and would like to
> take advantage of the RS232 module with my KX3.  Of course, I have no
> problem with this interface using my K3.  But I was wondering how one would
> go about creating a RS232 interface using the KX3.  Would a simple RS232 DB9
> 9 Pin Female to USB 2.0 PLC Serial Straight-through Cable work with the KX3?
> It seems so but I can't figure out how to get from the USB end of that cable
> to the ACC input.  Am I looking at this the right way?ThanksMarkKK2L
>
>
>
> -----
> Mark
> KK2L
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Greg Troxel-2]

KK2L <[hidden email]> writes:

> Good Afternoon All,I have a Cirro Mazzoni Baby loop antenna and would like to
> take advantage of the RS232 module with my KX3.  Of course, I have no
> problem with this interface using my K3.  But I was wondering how one would
> go about creating a RS232 interface using the KX3.  Would a simple RS232 DB9
> 9 Pin Female to USB 2.0 PLC Serial Straight-through Cable work with the KX3?
> It seems so but I can't figure out how to get from the USB end of that cable
> to the ACC input.  Am I looking at this the right way?ThanksMarkKK2L

Two separate comments:

  As I understand it the KX3 has a serial port, used for control and
  firmware updates, but it's a mini stereo phone plug.  This is what's
  on the end of the KXSER and KXUSB.

  Be careful about "RS232" vs "TTL level serial".  True RS232 has
  voltages from +3 to +15 (or +25, depending where you read about it) V
  and -3 to -15 (-25) V.  What is typically used is "TTL serial", which
  has 0V and 5V (for a 5V system; sometimes it is 3.3V).  Input circuits
  may or may not tolerate the higher voltages.  On a RPI you should
  definitely be careful


It appears that the Elecraft serial ports are ok with the full range
possible with conforming RS232 signals on receive, but use 9V
(conforming) and 0V (not conforming) on transmit.  That is almost
certainly ok because there is so much "TTL serial" that a robust
receiver has to treat 0 V like it is -3 V.

  http://elecraft.365791.n2.nabble.com/KX3-ACC1-interface-logic-signal-levels-what-is-quot-official-quot-Elecraft-standard-for-this-td7563052.html
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html