The Signal Return to Power Ground reference connection creates a loop when two channels are connected to a stereo amplifier.
Read D. Joffe for the standard solution.
Read D. Joffe for the standard solution.
Note in that last link that EVERY signal connection, whether input side, or output side, uses a two wire signal connection.
Note that where a Chassis exists, Pin1 I always connected to Chassis.
There is NO Signal Return/ground to Pin1 connection anywhere.
Note that where a Chassis exists, Pin1 I always connected to Chassis.
There is NO Signal Return/ground to Pin1 connection anywhere.
Pin 1 is the shield and gets connected to the separate chassies as seen on "Application example" in a balanced configuration. That way the chassies dont get interconnected via the signal cable.
In a single ended configuration "+" is signal and the unmarked is ground.
In a single ended configuration "+" is signal and the unmarked is ground.
Hi all, thank you for all your advises. I have single ended configuration (unbalanced RCA), so Pin 1 is irrelevant.
LL7904 is also not good -> $$$. So, I'll try from simple setup with resistors, then I'll go for Hammond 140QEX (also not cheap, but less than LL).
Now about NTE1 from Neutrik? $9.
NTE1 - Neutrik
LL7904 is also not good -> $$$. So, I'll try from simple setup with resistors, then I'll go for Hammond 140QEX (also not cheap, but less than LL).
Now about NTE1 from Neutrik? $9.
NTE1 - Neutrik
Theres no data but if your fine with bass cut off around 300 Hz those are ok is my guess. Lower bass response=bigger trafo.
No but larger core due to eddy currents that saturates. Low inductance means harder load requirements.
just cut the return on one of your sources and let it go to the brown soil and you'll be happy
you do that. lets bring up the truth to this matter. your signal needs a return in some matter. return is on the negative side of your rectification arrangment.
if you have several, more then one, devices that amplifies your signal, you still only need, and in practise, should only have one return.
there is no need for you to reference this return to any ground potential. your system will sound as predicted without it. the difference is that if you touch a "ground" , chinch or something you might get the same feeling as when you glide with wollen socks on a floor and then touch a radiator. a small spark.
that is why after you have glided around in your wollen socks on your new nice floor you have inducted yourself to be at a potential of 2500 volts over ground. or something. when you touch ground you get a spark. unlucky you. you are now grounded. same thing will appear on a touched non grounded high voltage equipment. a small spark
anyhow. if you, as everybody else, is connecting more then one devise to your system, every one of those will have a reference to earthground. This is what Andrew is telling you to have. And Salas, and Nelson. They are semi pro or pro constructers. Its their job to tell you.
Anyho, if your a DIY and knows what your doing. Why have 2,5 or 15 ground references? Signal needs zero. It only needs the difference between signal and ground (single ended). One is maybe nice to not have the sparks while inside. The chassie will still be saftey grounded as usual, with GND pin directly to chassie.
Andrew will tell you this is a safety issue. It is not. You can safely have kittens or children hugging your equipment this way as long as you have yellow/green to chassies.
if you have several, more then one, devices that amplifies your signal, you still only need, and in practise, should only have one return.
there is no need for you to reference this return to any ground potential. your system will sound as predicted without it. the difference is that if you touch a "ground" , chinch or something you might get the same feeling as when you glide with wollen socks on a floor and then touch a radiator. a small spark.
that is why after you have glided around in your wollen socks on your new nice floor you have inducted yourself to be at a potential of 2500 volts over ground. or something. when you touch ground you get a spark. unlucky you. you are now grounded. same thing will appear on a touched non grounded high voltage equipment. a small spark
anyhow. if you, as everybody else, is connecting more then one devise to your system, every one of those will have a reference to earthground. This is what Andrew is telling you to have. And Salas, and Nelson. They are semi pro or pro constructers. Its their job to tell you.
Anyho, if your a DIY and knows what your doing. Why have 2,5 or 15 ground references? Signal needs zero. It only needs the difference between signal and ground (single ended). One is maybe nice to not have the sparks while inside. The chassie will still be saftey grounded as usual, with GND pin directly to chassie.
Andrew will tell you this is a safety issue. It is not. You can safely have kittens or children hugging your equipment this way as long as you have yellow/green to chassies.
NO !
Single ended is actually unbalanced.
No SIGNAL is ever a single wire.
All signal connections are two wire.
The signal FLOWS from the Source and MUST RETURN to the Source.
The two wire signal connection is a Signal Flow and a Signal Return.
Using an RCA/Phono connector the Flow/Hot is the Pin and the Return/Cold is the barrel.
The barrel is NOT ground
post14453 is mixed up. Some is correct, some is wrong.
The easy way is just ignore it and save everybody a lot of hassle.
The easy way is just ignore it and save everybody a lot of hassle.
Correct. And IMO, barrel = signal ground should never ever contact mains earth ... which is absolute 'ground'.
Mmmm, not sure if I agree with you, Andrew. The way I look at it is:
* signal ground (passing through from one component to the other) is ground ... as far as the signal is concerned (completely separate from mains=absolute ground).
* the signal (hot) wire carries an AC signal, so the voltage on this wire changes from '+' to '-', relative to signal ground.
Regards,
Andy
Do you accept that in EVERY Signal circuit, that all the current that leaves the Source MUST come back to that Source?
Andrew, I've clearly stated what I believe ... it's 'a'.
You OTOH, seem to believe in 'b'.
And never the twain shall meet! 😉
Andy
I was hoping that you could change your mind, but you seem to be stating you have no intention of considering whether you need to change.