I feel dumb. Can this HepCat’s power jack be swapped to a center neg 2.1?

[KR Sound]

Seems like I should know this. Is there anything making this circuit unable to swap the power jack?

Or would I have to swap some cap orientations as well?

 

[Harry Klippton]

You have the pedal in front of you. Can't you trace it?

 

[BuddytheReow]

Do you still want to be able load a battery in there after swapping the power jack?

 

[KR Sound]

Do you still want to be able load a battery in there after swapping the power jack?

Maybe, I’ll have to ask my friend. It should just be a matter of swapping out the jack and wiring it like normal. It’s been a long day and I’m overthinking this.

 

[Robert]

If the goal is just to simply replace the DC jack, then yes, you can just replace it directly with any typical three terminal DC jack.

The pedal is positive tip / positive ground though. I assume your friend uses a special power supply with this one?


Reckon you could get some good clear pics of both sides of the PCB in there? For you know... science...

 

[drew.spriggs]

Seems like I should know this. Is there anything making this circuit unable to swap the power jack?

Or would I have to swap some cap orientations as well?

View attachment 103737

View attachment 103738

View attachment 103739

Jack polarity is independent of circuit polarity - you can wire up anything however you want to. Your circuit looks to be positive ground, and requires a center positive supply.

If you want to use a battery still, you'll require a 3 terminal jack. Just match the pinout to what you have now.

 

[Nic]

Jack polarity is independent of circuit polarity - you can wire up anything however you want to. Your circuit looks to be positive ground, and requires a center positive supply.

If you want to use a battery still, you'll require a 3 terminal jack. Just match the pinout to what you have now.

I understand the point would be to convert it to center negative so it does not need it's own power supply.

 

[KR Sound]

If the goal is just to simply replace the DC jack, then yes, you can just replace it directly with any typical three terminal DC jack.

The pedal is positive tip / positive ground though. I assume your friend uses a special power supply with this one?


Reckon you could get some good clear pics of both sides of the PCB in there? For you know... science...

I will.

 

[drew.spriggs]

I understand the point would be to convert it to center negative so it does not need it's own power supply.

If it is also positive ground, you can't unless you have a fully isolated power supply.

 

[Robert]

You can convert it to negative ground with charge pump voltage inverter.

No need to invert any components or anything like that and it'll play nice when daisy chained with other pedals.

 

[spi]

Is that speaker wire for the battery connect? Beats the thin wires that I get with the tayda battery jacks.

 

[KR Sound]

@Robert is this enough?

 

[Feral Feline]

Robert's too busy — you better send it to me to be traced.


Seriously, though...
I've always wanted to snoop inside an original Hep Cat.
Is it for sale?

 

[KR Sound]

Robert's too busy — you better send it to me to be traced.


Seriously, though...
I've always wanted to snoop inside an original Hep Cat.
Is it for sale?

It belongs to a friend. It’s actually not even working for some reason. Gotta figure that out too

 

[Robert]

@Robert is this enough?

It should be, give me just a bit and I'll take a look.

Robert's too busy — you better send it to me to be traced.

You're not wrong, but it looks easy enough... and it's broken, so we kinda need a schematic.

I'm just guessing it's going to be something similar to the Peach Fuzz without the input stage.

 

[KR Sound]

It should be, give me just a bit and I'll take a look.



You're not wrong, but it looks easy enough... and it's broken, so we kinda need a schematic.

I'm just guessing it's going to be something similar to the Peach Fuzz without the input stage.

Looks like she used this board for a couple different circuits.