On 5/7/2017 5:50 PM, Nr4c wrote:
Well I just put a scope on a KXUSB connector and it measures 5.04
> Volts DC.
It may measure +5.04V "at rest" but when data is flowing it will be
+/- 5.04 volts as RS-232 is a bi-polar signal.
*DO NOT* connect the KXUSB to an Icom transceiver as the Icom CI-V
signal is TTL compatible (+5V/0V). The negative signal (-5V) will
damage the Icom CI-V port.
73,
... Joe, W4TV
On 5/7/2017 5:50 PM, Nr4c wrote:
Well I just put a scope on a KXUSB connector and it measures 5.04 Volts DC. So
I really think it will work as long as you combine the Ring and Tip signals to
the Tip of a plug for the ICOM
Also note that the program interface on ICOM Dual Band Mobiles is on the Ring
of one of the Speaker jacks. It's also CI-V. At least this worked on my 2720
years ago.
Sent from my iPhone
...nr4c. bill
On May 7, 2017, at 12:20 PM, Harry Yingst via Elecraft
<[email protected]> wrote:
I worked with the Icom CI-V interface years ago when I was building frequency
agile remote bases
The CI-V is TTL (5 volts),
While I have not put an Elecraft KXUSB on a scppe to look at the signal levels
I'm gong to say No.
My logic is that the Elecraft May be able to use TTL, The Elecraft Will use
RS-232 Levels
If you look at the Elecraft W2 Manual it shows how to wire an interface that
goes directly to the DB-9 Pins
(I'm using the W2 here because it's easy to see what is going on) upon looking
at the schematic for the W2
you can see how they are level converting from Serial levels to TTL Levels.
In short Elecraft builds the Level converter into the gear Icom does Not.
Additionally Icom ties the TX&RX lines together.
________________________________
From: barry whittemore <[email protected]>
To: Elecraft <[email protected]>
Sent: Sunday, May 7, 2017 8:04 AM
Subject: [Elecraft] kxusb question
I have a KXUSB and was wondering if i can use it with an ICOM 706. I am going
to do a trip with the 706 for the June VHF contest and think it is basically
the same except that it has a stereo plug and the 706 is mono. is the ring in
the KXUSB used? I do not wish to damage either thing.
Thanks
Barry
NF1O
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