Alternative Component for 1N4748A in Clandestine Preamp

[spacelandstation]

Hi all! I'm having a hard time sourcing the 1N4748A from all my typical parts suppliers (Stompbox Parts, Smallbear, Amplified Parts, etc.). Has anyone completed this build with a different Zenner diode in place of the 1N4748A? I'm new to this so I'm not entirely sure what function this component has in the circuit so any education in that regard would be much appreciated as well.

 

[Robert]

Tayda has them.

1N4748A ZENER DIODE 1W 22V

TAK CHEONG - Get It Fast - Same Day Shipping

www.taydaelectronics.com

 

[spacelandstation]

Tayda has them.

1N4748A ZENER DIODE 1W 22V

TAK CHEONG - Get It Fast - Same Day Shipping

www.taydaelectronics.com

Thanks for that recommendation. I've ordered from Tayda twice and both times my order never arrived and I never received a refund so I'm a little wary of using them as a supplier again. However, I was able to find these at Amplified Parts after doing some creative searching so, in the end, problem solved.

 

[Robert]

Really? Wow, that's really unusual, I've never had any issues with Tayda.

Where are you located?

 

[spacelandstation]

Really? Wow, that's really unusual, I've never had any issues with Tayda.

Where are you located?

I'm in North Carolina. I may give them a shot again. It was probably not a Tayda issue but, rather, a shipping issue.

 

[Robert]

I'd send you one if I had it but 22V is a value I don't order too often.

 

[fig]

I'm in North Carolina. I may give them a shot again. It was probably not a Tayda issue but, rather, a shipping issue.

This is a job for Fig Labs!

What part of NC? I’m at Lake Norman.

I have four I can mail you…or throw out the window as I drive by…LOL

 

[Chuck D. Bones]

Are those ESD-safe organizers?

 

[fig]

Are those ESD-safe organizers?

Multiple Choice response:

A) If by ESD you mean The Episcopal School of Drama, then no.

B) Hang on, I’ll ask one.

C) Only if you discharge before touching them.

D) It depends on where you live.

E) Yes. The organizer would be unharmed by any static discharge.

Edit: Seriously though…I need some small esd pouches..I’ve yet to have any trouble but it’s best practice.

 

[Robert]

E) Yes. The organizer would be unharmed by any static discharge.

Challenge accepted. Intimacy of contact, speed of separation! (sounds like my first marriage)



In case you were wondering, this is the new PedalPCB Plasma Pedal prototype. You don't even need an amp.

 

[fig]

Challenge accepted. Intimacy of contact, speed of separation!

View attachment 28049

In case you were wondering, this is the new PedalPCB Plasma Pedal prototype. You don't even need an amp.

Hey, that looks like my braininizer ! Wow, does it pack a mean punch….woooooo!

 

[Chuck D. Bones]

But seriously folks,
Zeners are used as ESD protection devices, which means they are not ESD susceptible themselves. Therefor that organizer does not need to be ESD-safe.

But it would be better if all of the labels were the same size.

 

[fig]

Zeners are used as ESD protection devices

I keep a couple in my pocket during winter months

 

[spacelandstation]

Guys I very much appreciate the responses. Thankfully I was able to snag a few from Amplified Parts. Thanks again!

 

[spacelandstation]

This is a job for Fig Labs!

What part of NC? I’m at Lake Norman.

I have four I can mail you…or throw out the window as I drive by…LOL

Much appreciated! I’m all sorted thanks to Amplified Parts.

 

[spacelandstation]

Another quick question… I’m noticing that the build documentation calls for a 3362P type trimpot which, in all my searches with suppliers, turns up a standard 3 pin trimpot. But there are five holes in the board where this trimpot is supposed to live. Am I missing something?

 

[benny_profane]

The extra pads are there to fit different packages. You’ll notice the pads on the sides are shorted together.

 

[spacelandstation]

The extra pads are there to fit different packages. You’ll notice the pads on the sides are shorted together.

Thanks again! I’m still a total novice despite having built a ton of pedals from PCBs. I’m trying to move beyond the “paint by numbers” approach to populating PCBs but it’s still pretty slow going. Thanks again!

 

[Robusto]

Tayda has them.

1N4748A ZENER DIODE 1W 22V

TAK CHEONG - Get It Fast - Same Day Shipping

www.taydaelectronics.com

So 1W is okay? The build doc says 1/2W, and that's how i ended up here...don't see any 1/2W for sale anywhere.

 

[Chuck D. Bones]

1W is fine.