Hoffman Amplifiers Tube Amplifier Forum

Other Stuff => Effects => Topic started by: g-man on December 15, 2022, 08:24:31 pm

Title: Power supply daisy chain isolation
Post by: g-man on December 15, 2022, 08:24:31 pm

Deleted

Title: Re: Power supply daisy chain isolation
Post by: acheld on December 16, 2022, 10:24:27 am

I use a 1Spot Pro CS6 and daisy chain a bunch of pedals off of the various output channels.  I have not had problems with noise in doing so.   

Maybe I'm naive about this, but I don't hear any difference when I'm using dedicated (eg, 1 pedal per power wart) vs the 1Spot. 

Possibly a solution in search of a problem? 

Title: Re: Power supply daisy chain isolation
Post by: sluckey on December 16, 2022, 11:10:02 am

Quote from: g-man on December 15, 2022, 08:24:31 pm

Most pedals would draw as little as 10 mA up to maybe 200 mA.

A 10ma draw thru that 100Ω would drop the voltage down to 8V for the pedal. OK for a lot of pedals. But...

A 200ma draw through a 100Ω would cause a 20V drop across the 100Ω. But wait! You done run into the wall. A 9V battery can only push 90mA through a 100Ω and that leaves zero volts for your pedal. Better rethink this.

I built this simple power supply that handled nine pedals with no isolation resistors.

Title: Re: Power supply daisy chain isolation
Post by: g-man on December 16, 2022, 12:41:04 pm

Deleted

Title: Re: Power supply daisy chain isolation
Post by: RadioComm on December 16, 2022, 04:20:47 pm

Quote from: acheld on December 16, 2022, 10:24:27 am

I use a 1Spot Pro CS6 and daisy chain a bunch of pedals off of the various output channels.  I have not had problems with noise in doing so.   
Maybe I'm naive about this, but I don't hear any difference when I'm using dedicated (eg, 1 pedal per power wart) vs the 1Spot. 
Possibly a solution in search of a problem?

+1