I'm back with some news of the build of my dual mono PSU F7
First, Thank You for you many replys !
I've remove the "short" between the two transforers, and ... yes , now no vibrating transformer, but 50hz noise still present on speakers.
With no input connected : 50hz Noise ~ -30db
With input connected (Fictive Load) : 50Hz Noise ~ -40db
I've try to remove the RFI/EMI Filter, same problem.
Any idea to resolve this issue ?
First, Thank You for you many replys !
I've remove the "short" between the two transforers, and ... yes , now no vibrating transformer, but 50hz noise still present on speakers.
With no input connected : 50hz Noise ~ -30db
With input connected (Fictive Load) : 50Hz Noise ~ -40db
I've try to remove the RFI/EMI Filter, same problem.
Any idea to resolve this issue ?
Please click on the Ground loops link below. Towards the back of the presentation is a debug process you can follow (not exhaustive but will point you in tne right direction).
Look carefully at the ‘how to do it practically’ section for wiring up.
Is this a dual mono design BTW?
Look carefully at the ‘how to do it practically’ section for wiring up.
Is this a dual mono design BTW?
Correction - I see it is a dual mono design.
How have you connected the amplifier side to the chassis?
How have you connected the amplifier side to the chassis?
Bonzai,
The connection to the chassis is make by the IEC connector (Earth)
No connection between amplifier and chassis.
And yes, it's a dual mono 😉
thank you for the link about Ground Loop ! I read that
The connection to the chassis is make by the IEC connector (Earth)
No connection between amplifier and chassis.
And yes, it's a dual mono 😉
thank you for the link about Ground Loop ! I read that
Bonzai
If I add TWO ground loop breaker (connected between 0v PSU and Chassis Earth) this for both PSU (Recall it is a Dual Mono Power supply) ?
If I add TWO ground loop breaker (connected between 0v PSU and Chassis Earth) this for both PSU (Recall it is a Dual Mono Power supply) ?
