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Archive for March 6th, 2016

Vacuum Tube Prices, Then and Now

Quite by coincidence, a Pile o’ Stuff disgorged a 1975 Radio Shack Catalog listing three dense pages of vacuum tubes, including a 21HB5A:

Radio Shack 1975 Catalog - 21HB5A Tube Listing

Radio Shack 1975 Catalog – 21HB5A Tube Listing

These days, you buy New Old Stock 21HB5A tubes from eBay for about the same in current dollars with shipping:

eBay - 21HB5A Tubes

eBay – 21HB5A Tubes

I should stock up and light up!

Vacuum Tube LEDs - IBM 21HB5A Beam Power Tube - green violet phase

Vacuum Tube LEDs – IBM 21HB5A Beam Power Tube – green violet phase

 

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