Grounded power supply cord on a transformerless amp ?

[bereanbill]

Hi again? Is it possible to put a grounded power supply cord on a transformerless amp ( 50C5, 35W4, 12AU6 ) provided it has an isolation transformer ?
BTW: What is the correct name for such an amp? I have heard "transformerless", "Line voltage", "voltage dividing"...??

 

[Miles Prower]

Hi again? Is it possible to put a grounded power supply cord on a transformerless amp ( 50C5, 35W4, 12AU6 ) provided it has an isolation transformer ?

It is, and an isolation xfmr is mandatory for such a circuit.

BTW: What is the correct name for such an amp? I have heard "transformerless", "Line voltage", "voltage dividing"...??

Suicide box.

 

[bereanbill]

Re: Re: Grounded power supply cord on a transformerless amp ?

It is, and an isolation xfmr is mandatory for such a circuit.



Suicide box.

Yeah...especially for harmonica players ! Scares the willies out of me when I see them advertsed on Feebay as harp amps. Gives a whole new meaning to the term "Hot Lips". With the isolation tranny and a grounded cord, are they reasonably safe? Some...especially this little Lindell I have...can put out a cool low-fi grind that is a useful recording tone.

 

[DigitalJunkie]

With a properly wired isolation trans,and a chassis earth-ground connection,it is safe.

 

[Eli Duttman]

Suitable isolation trafos are available at very reasonable cost. Check out Triad's N-68X and N-77U. Allied Electronics has 'em.

 

[bereanbill]

Thanks Miles, DJ, and Eli. This amp has an OEM IT...must have been made after UL required them? So do i wire it as the 2 conductor and just ground it to the chassis ?