Wireless Headphones with Hum sound?

[ivtec]

Re: Wireless Headphones with Hum sound?

no hum is tolerable

You are right, but i've got it for free due to that hum
and wife is happy with it like that,i'm happy she is cause like that she wont bother me when go to bed,have a happy new year mate.

[petehall347]

Re: Wireless Headphones with Hum sound?

no hum is tolerable

[ivtec]

Re: Wireless Headphones with Hum sound?

hi folks wish you had a very great Christmas, update on my hum sound ,i found in my scrap an adapter that the hum sound is more tolerable; a happy new year for you all.

https://www.ebay.com/itm/382328899748

[ivtec]

Re: Wireless Headphones with Hum sound?

You can find 5v adaptors all over the place, many cheap routers etc. use them, you could also make a usb to 5v cable and use that if the tv has a usb port.

Thanks R_J; i also tried a whole bunch of 5 DC usb chargers that i have and also tried my Net-gear Nighthawk c7100v USB port and also my Android tv box usb port and same result, the only solution to reduce hum to be tolerated is the PC Old Power supply,thanks

[R_J]

Re: Wireless Headphones with Hum sound?

You can find 5v adaptors all over the place, many cheap routers etc. use them, you could also make a usb to 5v cable and use that if the tv has a usb port.

[ivtec]

Re: Wireless Headphones with Hum sound?

hi guys , new update on this hum issue ,i had an old PC power supply in my scrap and connected it to the 5 v dc line and much better,not perfect but it's usable , but it's kinda expensive on electricity to have a PC power supply for this,but if i have no alternative will use it and turn it off when it's not in use ,have an happy Christmas
Quote

[ivtec]

Re: Wireless Headphones with Hum sound?

if you can open up the base station and look at how the microphone circuit has been implemented, you might consider trying to disconnect it or at least part of it to see if it has any impact... might be an issue of "ground isolation" to the microphone such that noise coming thru the adapter's "negative" is providing a "hum cycle" in the microphone's preamp stage.

thanks budwichh ;i'll give it a try after christmas,there is also some options on line to build an isolation audio transformer ,if i find any audio transformers similar to these in my scrap; i just don't want to spend any money on this; https://www.youtube.com/watch?v=6Gc8nZG_-F8https://www.aliexpress.com/item/32814995677.html

[budwich]

Re: Wireless Headphones with Hum sound?

Thanks madan1,appreciate your input and help; the wireless set is this;https://www.walmart.com/ip/Pyle-Pro-...ll&athena=true

and it runs both the Base and headset on 2-3v AAA batteries and with those batteries on the base and on headset it sounds good no hum,but it also has on the base a input for 4.5v dc power supply and it's with this power supply it does the hum on input on any source like TV sound,they did not supply the regulated power supply ,i have many great regulated power supply's, i have to use a external power supply cause the base just eats butteries like hell, i already complained to the dealer and requested a return and refund, i already received reply from them and they say they are going to refund me and i don't even need to return the headphones ,they said i can keep it or donate it,that's great news,i'm good with repair electronics ,if i can fix this hum that will be great,that's why i ask you experts if you have an easy fix ,i know i can do it,now since i don't have to return it maybe i can open it and put a filter cap somewhere in the circuit, or maybe the issue is because this set has also microphone and that might be the cause? maybe i can get now wireless Bluetooth headphones?,what you think about those;thanks and you all have a Merry Christmas

if you can open up the base station and look at how the microphone circuit has been implemented, you might consider trying to disconnect it or at least part of it to see if it has any impact... might be an issue of "ground isolation" to the microphone such that noise coming thru the adapter's "negative" is providing a "hum cycle" in the microphone's preamp stage.

It appears from the manual that the microphone circuit is always on (ie. it can't be "not selected").

[budm]

Re: Wireless Headphones with Hum sound?

Thanks guys;budem i can hear the hum when it's not connected to the tv output also ,

petehall347; how i build an isolation transformer circuit?

Then it is not ground loop or isolation problem since it still hums as stand alone.

[petehall347]

Re: Wireless Headphones with Hum sound?

Thanks guys;budem i can hear the hum when it's not connected to the tv output also ,

petehall347; how i build an isolation transformer circuit?

i have a ready made one with rca connectors .like this

[madan1]

Re: Wireless Headphones with Hum sound?

Try connecting it to a phone or mp3 player... anything that runs on batteries and has no connection to the mains... or you can just connect the left and right channel inputs to the unit's ground.

[ivtec]

Re: Wireless Headphones with Hum sound?

Thanks guys;budem i can hear the hum when it's not connected to the tv output also ,

petehall347; how i build an isolation transformer circuit?

[petehall347]

Re: Wireless Headphones with Hum sound?

you could try plugging the power supply into a different outlet .plus you could also try an isolation transformer on the signal inputs

[budm]

Re: Wireless Headphones with Hum sound?

I wonder if it is ground loop problem. Do you hear the hum if the base audio input is not connected the TV audio line out?

[ivtec]

Re: Wireless Headphones with Hum sound?

Sorry, I'm lil bit confused.
Could you explain again your setup?
So you have wireless headphones and base.
Where do you connect the power supply - to the base or the headphones?
You said it can run on batteries.. is this the headphones, the base or both?
If "it" runs or batteries is there any hum?

Thanks madan1,appreciate your input and help; the wireless set is this;https://www.walmart.com/ip/Pyle-Pro-...ll&athena=true

and it runs both the Base and headset on 2-3v AAA batteries and with those batteries on the base and on headset it sounds good no hum,but it also has on the base a input for 4.5v dc power supply and it's with this power supply it does the hum on input on any source like TV sound,they did not supply the regulated power supply ,i have many great regulated power supply's, i have to use a external power supply cause the base just eats butteries like hell, i already complained to the dealer and requested a return and refund, i already received reply from them and they say they are going to refund me and i don't even need to return the headphones ,they said i can keep it or donate it,that's great news,i'm good with repair electronics ,if i can fix this hum that will be great,that's why i ask you experts if you have an easy fix ,i know i can do it,now since i don't have to return it maybe i can open it and put a filter cap somewhere in the circuit, or maybe the issue is because this set has also microphone and that might be the cause? maybe i can get now wireless Bluetooth headphones?,what you think about those;thanks and you all have a Merry Christmas

[madan1]

Re: Wireless Headphones with Hum sound?

Sorry, I'm lil bit confused.
Could you explain again your setup?
So you have wireless headphones and base.
Where do you connect the power supply - to the base or the headphones?
You said it can run on batteries.. is this the headphones, the base or both?
If "it" runs or batteries is there any hum?

[ivtec]

Re: Wireless Headphones with Hum sound?

Thanks R_J ,i tried a few of great power supp and no avail,here a 2 of many i tried https://www.google.com/search?q=supp...kmOl3hM:&vet=1

https://www.google.com/search?q=ac+a...HJ7dKVTrOwHuM:

[ivtec]

Re: Wireless Headphones with Hum sound?

Thanks R_J ,i tried a few of great power supp and no avail,here 2 good ones https://www.google.com/search?q=supp...kmOl3hM:&vet=1

[R_J]

Re: Wireless Headphones with Hum sound?

Those cheap supplies usually use a small transformer, bridge and output cap, so the ripple willbe 60 or 120 hz. Try and use a smps adaptor, If it can handle 4.5vdc, I would think a 5vdc one would also work which are quite common these days.

[ivtec]

Re: Wireless Headphones with Hum sound?

Hi guys i open gift box again to try to connect it same outlet of the TV and it make no difference no matter what regulated power supply or search protector power outlet i use it's same annoying hum ridding with tv sound,i found out the thing doesn't have to be connected to the audio output source to do the hum,any more ideas before i try to return it,which probably they wont refund me,the wallmart site is just like amazon where these people sell this junk,i should used Amazon cause i always had good luck with returns and refunds.