[Elecraft] [WriteLog] Using K3 KIO3B USB with Writelog

[Rick Tavan]

Thanks, Joe! I've wondered about this for years - that some devices' port
numbers wander and others persist. You've solved a conundrum!

73,

Rick N6XI

On Fri, Dec 25, 2015 at 11:19 AM, Joe Subich, W4TV <lists at subich.com> wrote:

>
> But if you plug it into a DIFFERENT USB port, Windows will think it's
>> a new device, and assign ANOTHER COM port to it.
>>
>
> That's true only in so far as the USB device does not have a unique
> serial number.  The USB device descriptor in the EEPROM has a place
> for a serial number but many manufacturers do not make use of it.
> If the device is "numbered", it can be moved from port to port and
> the virtual COM number will not change.  Unfortunately, many hardware
> manufacturers do not take the time to provide/program a hardware serial
> number before shipping their products - they rely on the chip maker's
> default device descriptor and drivers.
>
> 73,
>
>   ... Joe, W4TV
>
>
> On 12/25/2015 11:56 AM, Jim Brown wrote:
>
>> On Fri,12/25/2015 6:39 AM, Ed Muns wrote:
>>
>>> No splitters or isolation transformers are needed.  That is the whole
>>> point
>>> of the KIO3B.
>>>
>>
>> WRONG! The need for isolation transformers is a total fallacy. No
>> isolation transformers are needed with ANY radio if proper, simple
>> chassis-to-chassis bonding of all interconnected equipment is done in
>> the shack. It's easy and cheap -- all it takes is short lengths of
>> plain, ordinary copper wire.
>>
>> Study http://k9yc.com/GroundingAndAudio.pdf
>>
>> The tutorial is a bit long because I have to bust the "ground loop" myths.
>>
>> Otherwise, nothing wrong with Ed's detailed advice. EXCEPT -- Windows
>> defines a COM port when you plug in a device that is new to it. It
>> remembers that assignment as long as you plug the same device into the
>> SAME USB PORT on the computer. But if you plug it into a DIFFERENT USB
>> port, Windows will think it's a new device, and assign ANOTHER COM port
>> to it. SO -- be careful to keep notes of which devices (rigs, mice,
>> etc.) are plugged into which USB ports. It's real easy to end up with a
>> mess if you don't!  Ask me how I know. :)
>>
>> 73, Jim K9YC
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-- 

Rick Tavan
Truckee, CA