Astatic D-104 crystal microphone

Astatic crystal microphone on a stand against a black background

https://www.nfsa.gov.au/sites/default/files/2025-07/object-crystal-microphone-423989.jpg

Title:

Astatic D-104 crystal microphone

NFSA ID

423989

Year

1933

Summary

The Astatic model D-104 crystal microphone, introduced in 1933, is known as ‘the lollypop’ for its shape. It remained popular for decades, especially with amateur radio ('ham radio’) enthusiasts.

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Astatic D-104 crystal microphone

Summary

CREDITS