Question about IC heatsink

[Ghost Planet]

I'm planning to build a tiny giant amp. The plans say you need to place heat sinks on the ICs. Can I make them out of household materials, or do I need to purchase some? Here are the ICs used in the project. Thanks.
1 – TDA7240A
1 – LM338T
1 – TL072

[slacker]

The TL072 doesn't need a heatsink. The easiest thing to do if you're putting it in a metal case is to bolt the other two to the case, that will act as a heatsink. The kit comes with bolts and insulating washers to allow you to do this.

[J0K3RX]

slacker beat me to it.. Yeah, what he said!

Look here, scroll down the page:
http://www.diystompboxes.com/smfforum/index.php?topic=89687.msg775237;topicseen

[Ghost Planet]

Cool, thanks. That was a super easy solution.

[Jdansti]

Just to emphasize what jok3rx said, be sure you use the insulator on the LM338T because the tab is connected to the +V out.
http://www.ti.com/lit/ds/snvs771a/snvs771a.pdf

The TDA7240A's tab is connected to ground, so you should be able to connect it to the case directly.
http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00010656.pdf