Face Melter IC

[sergio]

Hi!

The integrated circuit of Face Melter is CA3240EZ but I only found a CA3240 IC.
Will it work with this?

Thanks!

 

[Chuck D. Bones]

When you say "found," where did you find it? These are the part numbers for those parts currently in production:

 

[okstateblues]

https://www.mouser.com/Search/Refine?Keyword=ca3240

I am in the process of building this one and I got my IC from here

 

[Chuck D. Bones]

If you read the invoice or the device, it will give you the full part number. I'm sure the CA3240xx you got from Mouser will work fine.

 

[sergio]

Bought at Banzai Music: https://www.banzaimusic.com/CA3240.html
I will check if got also those letters.

 

[sergio]

You are right it ends with the letters EZ! Thanks!

 

[slacjs]

Would the 3240AEZ be a suitable alternative to the 3240EZ?

I'm looking at the spec sheet and it seems they're similar enough but there are a few differences and I'm not sure if that will matter.

 

[Chuck D. Bones]

The A part has slightly better specs than the non-A part. It is a good sub.

 

[burger-patty-and-bacon]

We got ours from small bear

IC CA3240EZ

Guitar pedals, pedal parts and electronics.

smallbear-electronics.mybigcommerce.com

I love my melter! It sounds so freakin' good. Also close to my heart because it was my very first build!

 

[spi]

I've got a Melter PCB on the way, but no CA3240. Wondering if anyone tried it with a TL072, or a good ole 4558? What other chips might sound good in this? Seems like CA3240 is uniquely a "bimos" chip, but I don't know if that is important to this circuit.

I'm probably going to try TL072--if it doesn't work out then I can try to source a CA3240.

 

[Chuck D. Bones]

Try TL072.

 

[jetfeeds]

I've got a Melter PCB on the way, but no CA3240. Wondering if anyone tried it with a TL072, or a good ole 4558? What other chips might sound good in this? Seems like CA3240 is uniquely a "bimos" chip, but I don't know if that is important to this circuit.

I'm probably going to try TL072--if it doesn't work out then I can try to source a CA3240.

Hey mate, how did the the TL072 sound? I'm trying to source the CA3240EZ and it seems out of stock everywhere!

 

[spi]

Hey mate, how did the the TL072 sound? I'm trying to source the CA3240EZ and it seems out of stock everywhere!

I haven't even got around to building it yet. In the meantime I picked up a CA3240 from smallbear before they ran out of stock.

 

[djmiyta]

Got mine off Amazon they work just fine

 

[Chuck D. Bones]

I have not built one of these, but just from studying the circuit I can tell that the distortion comes from the LEDs and the MOSFET. I expect any decent FET input dual opamp will work. If you install a socket, then you can try different dual opamps.

 

[brightlight]

Try TL072.

Has it ever been discovered if a TL072 works well for this build?

 

[Chuck D. Bones]

You could be the one to try it. I have an FM at the bottom of my breadboard list...

 

[Laundryroom David]

Hmmmm. Looks like I have everything on hand to breadboard this. Nothing like melting some … faces … on a Friday night. Might give this a shot. Shall report back.

 

[Chuck D. Bones]

How about configuring the breadboard for a single opamp? The 2nd opamp on the board does nothing. Then you could try CA3130, CA3140, TL071, LF351, LM308... shit, you could even try a 741!

 

[jimilee]

I’ve etched a board, but haven’t built it yet. I’m curious about the opamp, too. I’ve read different things; any dual will work all the way to you have to use THE one.