Conflicting IP - single client

[skeal]

How does that work may I ask?
Last I checked unless it's faulty I never heard of removing antennas on devices causing it to fry.

Something about load level on the device the antenna is connected to. The antenna has to be there to create the load level it requires. Sort of like having a length of speaker wire connected to an amp but without a speaker to connect to. This can cause amplifier problems. Maybe it has something to do with resistance don't know.

 

[Vexira]

Something about load level on the device the antenna is connected to. The antenna has to be there to create the load level it requires. Sort of like having a length of speaker wire connected to an amp but without a speaker to connect to. This can cause amplifier problems. Maybe it has something to do with resistance don't know.

I see same concept as a PC power supply.
Makes sense, If it were me I'd leave it to no lose it.

 

[skeal]

I see same concept as a PC power supply.

That is a perfect example!!

 

[ColinTaylor]

How does that work may I ask?

This is old-school electronics theory. Power amplifiers are designed to drive very low impedance loads. For Hi-Fi's that would be speakers (8 ohms) and for radios it would be antennas (50 or 75 ohms). With the load disconnected the impedance is effectively infinite. This was a major problem for 1970's era valve ("tube" for our American readers ) or semiconductor amplifiers. Without the expected load to dissipate it the power had nowhere to go and was reflected back to the amplifier (or the output transformer). This usually meant it overheated and burnt out.

Now to be fair, that was a long time ago and I'd guess that modern power amplifiers have built-in protection circuits. But for people of a certain age the mere thought of running any amplifier without a load brings back painful (and expensive) memories. In any case, whilst it's probably OK to run modern amplifiers without a load for a short time I wouldn't be comfortable leaving it like that permanently (unless the manual says so).

 

[Grisu]

without antennas 2W cannot been blown out, driver can overheat. Dont know if clients got enough power to demage HF-drivers, but for sure its not good for them. Well known in radio applications and all output stages.

Too late, Colin anwered already quite similar with even more explanations.

 

[skeal]

This is old-school electronics theory. Power amplifiers are designed to drive very low impedance loads. For Hi-Fi's that would be speakers (8 ohms) and for radios it would be antennas (50 or 75 ohms). With the load disconnected the impedance is effectively infinite. This was a major problem for 1970's era valve ("tube" for our American readers ) or semiconductor amplifiers. Without the expected load to dissipate it the power had nowhere to go and was reflected back to the amplifier (or the output transformer). This usually meant it overheated and burnt out.

Now to be fair, that was a long time ago and I'd guess that modern power amplifiers have built-in protection circuits. But for people of a certain age the mere thought of running any amplifier without a load brings back painful (and expensive) memories. In any case, whilst it's probably OK to run modern amplifiers without a load for a short time I wouldn't be comfortable leaving it like that permanently (unless the manual says so).

I know...I'm old. I owned a tv with tubes in it, that does age me...lol

 

[Mathieu]

Problem apparently solved.

Since I could not find a way to -safely- disable wifi on the client, I pulled the cable out.
Not my first choice, but hopefully the unplugged Cat6 will be no frying threat to the router, and gone will be the conflicts (well ermm, would please the administrators not just close the thread now...)

Thank you all guys for taking the time.

 

[Grisu]

Why didnt you leave it on ethernet and delete WiFi connection on client side, so that it cannot connect (without SSID and password)?
Or just reset it, then it will be lost too and setup again without Wifi.

 

[Mathieu]

Why didnt you leave it on ethernet and delete WiFi connection on client side, so that it cannot connect (without SSID and password)?
Or just reset it, then it will be lost too and setup again without Wifi.

Honestly, because I couldn't find an option to delete it on the client side, and above all because I couldn't be bothered to reconfigure the amp afterwards, but...
In the end I gave in and followed your advice. I went back to reset the amp, reinstall the FW and configure it from scratch. Did all that with the CAT plugged in, thereby assuming the amp had no clue as to what SSID / passwords etc were.
On the router, I did update the DHCP reservation list (the IP I had assigned to it being outside of the pool, I also manually configured the client). And to my surprise -read 'dismay'-, after a while the router's client list was showing two entries for that same IP, each with a distinct MAC, matching the ethernet and wifi HW of the amp).
I therefore proceded to resort to AI Protection/Parental Control/Time Scheduling to prevent the wifi interface to access the internet 24/7. Seems to work at the moment...

Out of ignorance, I think the issue is down to a rather unsophisticated network card on the amp. That said, I noticed the problem of dual interfaces showing up is not restricted to my cheap Onkyo gear, as the same occurs with my Apple TV, for which the router's client list also displays two entries (wired and wireless). Administered the same medicine...

As an aside, I noticed that the client name which appears on the router's client list does not match the one assigned to the LAN/DHCP Server / Manual assignment. This has confused me for some time (although I am sure that had been discussed on other threads).

Cheerio