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The 6E2 electron tube driver board can make the screen light column of the 6E2 tube flash with the strength of the audio signal. The luminous area of the screen is proportional to the strength of the signal.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.