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kxusb question

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barry whittemore

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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Don Wilhelm

Re: kxusb question

Barry,

If the Icom jack is mono, then I think the answer is NO.
The tip of the KUSB is TXD and the ring is RXD. Both are necessary for
RS-232 communications.

If I recall, the Icom uses a special interface that is not RS-232
compatible.

73,
Don W3FPR

On 5/7/2017 8:00 AM, barry whittemore wrote:
> 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.
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Dave KW4M

Re: kxusb question

The Icom interface uses a single line for transmit and receive data (plus ground.) It is known as the CI-V interface. The KXUSB is not directly compatible, although a simple adapter circuit could be made.

USB CI-V interface cables do exist and can be purchased on eBay or from Amazon for around $10. A search for the terms USB CI-V will find them.

I've used one on my ancient 735 and it works well.

73,
Dave
KW4M

Dave

My Web Site

Elecraft mailing list

Re: kxusb question

In reply to this post by barry whittemore

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 <[hidden email]>
To: Elecraft <[hidden email]>
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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barry whittemore

Re: kxusb question

In reply to this post by Don Wilhelm

Don, and others, Thanks for the info, I suspected that might be the case.

Thats why I asked.

I appreciate the info,

73

Barry

NF1O

________________________________
From: Don Wilhelm <[hidden email]>
Sent: Sunday, May 7, 2017 8:19 AM
To: barry whittemore; Elecraft
Subject: Re: [Elecraft] kxusb question

Barry,

If the Icom jack is mono, then I think the answer is NO.
The tip of the KUSB is TXD and the ring is RXD. Both are necessary for
RS-232 communications.

If I recall, the Icom uses a special interface that is not RS-232
compatible.

73,
Don W3FPR

On 5/7/2017 8:00 AM, barry whittemore wrote:
> 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.
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Nr4c

Re: kxusb question

In reply to this post by barry whittemore

I believe you are close. The plug is not the issue. The RX and TX RS232 signals are separated on the KXUSB plug. One on tip, other on ring.

The ICOM has both signals on the tip. So a short jumper combining the tip and ring signals on the tip of a mono plug should get you going.

Sent from my iPhone
...nr4c. bill

> On May 7, 2017, at 8:00 AM, barry whittemore <[hidden email]> wrote:
>
> 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
> ______________________________________________________________
> 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
> Message delivered to [hidden email]

k6mrmagnet

Re: kxusb question

Uh, No. CI-V is a CSMA-CD type of system, with station addressing. RS-232 is nothing like it. You can’t just put RxD and TxD on the same wire. Data format is way different.

Ken K6MR

From: Nr4c<mailto:[hidden email]>
Sent: Sunday, May 7, 2017 10:56 AM
To: barry whittemore<mailto:[hidden email]>
Cc: Elecraft<mailto:[hidden email]>
Subject: Re: [Elecraft] kxusb question

I believe you are close. The plug is not the issue. The RX and TX RS232 signals are separated on the KXUSB plug. One on tip, other on ring.

The ICOM has both signals on the tip. So a short jumper combining the tip and ring signals on the tip of a mono plug should get you going.

Sent from my iPhone
...nr4c. bill

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Nr4c

Re: kxusb question

In reply to this post by Elecraft mailing list

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 <[hidden email]> 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 <[hidden email]>
> To: Elecraft <[hidden email]>
> 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
>
> ______________________________________________________________
> ______________________________________________________________
> 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
> Message delivered to [hidden email]

Joe Subich, W4TV-4

Re: kxusb question

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 <[hidden email]> 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 <[hidden email]>
>> To: Elecraft <[hidden email]>
>> 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
>>
>> ______________________________________________________________
>> ______________________________________________________________
>> 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
>> Message delivered to [hidden email]
>
> ______________________________________________________________
> 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
> Message delivered to [hidden email]
>