#1500 - 6¢ Electronics
Marconi's spark coil and spark gap, patented in 1897, were the first steps in transmitting electrical impulses and signals through the air. Scott 1500 Electronics
| #1500 - 6¢ Electronics | ||
|---|---|---|
| mint $0.40 | Add to Wish List 1500 M | |
| used $0.20 | Add to Wish List 1500 U |
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