Uploaded August 2013 | Updated September 2026, 3 weeks ago
How to make an amplifier for a crystal radio that plays it on a loud speaker, like a permanent magnet speaker. This shows the circuit then goes step-by-step through making it on a perfboard. This amplifier circuit is built around the LM386 amplifier chip,
and uses various capacitors and resistors. I used an equivalent part for the LM386, the NTE823.
This video has correct English captions. Click on the CC button at the bottom of the video to see them.
The book I mentioned that I first found this project in (very good
collection of projects):
"Radio Receiver Projects You Can Build" by Homer L. Davidson
The LM386 chip document I mentioned containing the circuit and more
chip details on Texa Instruments' website:
ti.com/lit/ds/symlink/lm386.pdf
See also:
How to Make/Build a Crystal Radio
youtu.be/VqdcU9ULAlA
Portable Crystal Radio using Loop Antenna and Pizza Box
youtu.be/iunAvz9PbN0
How Radiation Works - Americium 241, Alpha Particles and Gamma Rays
youtu.be/aJkx6hAD-4E
How a Crystal Radio Works
youtu.be/0-PParSmwtE
How to Make Amplifier for Crystal Radio Earpiece
youtu.be/cQ-LxMDrD_o
For my webpage about making this crystal radio amplifier, go to:
rimstar.org/science_electronics_projects/make_crystal_radio_amplifier_for_speaker.htm
Follow behind-the-scenes on:
Twitter twitter.com/#!/RimStarz
Google+ plus.google.com/116395125136223897621
rimstar.org
Music used from 0:15 to 2:31 and from 9:08 to 9:35:
5 Cents Back - music by audionautix.com
Music used from 2:37 to 4:50 and 7:44 to 8:25:
Sneaky Snitch Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
creativecommons.org/licenses/by/3.0
ISRC: USUAN1100772
Music used from 4:50 to 7:44:
Decisions Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
creativecommons.org/licenses/by/3.0
ISRC: USUAN1100756
How to make an amplifier for a crystal radio that plays it on a loud speaker, like a permanent magnet speaker. This shows the circuit then goes step-by-step through making it on a perfboard. This amplifier circuit is built around the LM386 amplifier chip,
and uses various capacitors and resistors. I used an equivalent part for the LM386, the NTE823.
This video has correct English captions. Click on the CC button at the bottom of the video to see them.
The book I mentioned that I first found this project in (very good
collection of projects):
"Radio Receiver Projects You Can Build" by Homer L. Davidson
The LM386 chip document I mentioned containing the circuit and more
chip details on Texa Instruments' website:
ti.com/lit/ds/symlink/lm386.pdf
See also:
How to Make/Build a Crystal Radio
youtu.be/VqdcU9ULAlA
Portable Crystal Radio using Loop Antenna and Pizza Box
youtu.be/iunAvz9PbN0
How Radiation Works - Americium 241, Alpha Particles and Gamma Rays
youtu.be/aJkx6hAD-4E
How a Crystal Radio Works
youtu.be/0-PParSmwtE
How to Make Amplifier for Crystal Radio Earpiece
youtu.be/cQ-LxMDrD_o
For my webpage about making this crystal radio amplifier, go to:
rimstar.org/science_electronics_projects/make_crystal_radio_amplifier_for_speaker.htm
Follow behind-the-scenes on:
Twitter twitter.com/#!/RimStarz
Google+ plus.google.com/116395125136223897621
rimstar.org
Music used from 0:15 to 2:31 and from 9:08 to 9:35:
5 Cents Back - music by audionautix.com
Music used from 2:37 to 4:50 and 7:44 to 8:25:
Sneaky Snitch Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
creativecommons.org/licenses/by/3.0
ISRC: USUAN1100772
Music used from 4:50 to 7:44:
Decisions Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
creativecommons.org/licenses/by/3.0
ISRC: USUAN1100756
