Vintage General Radio 1551 SPL Meter

Want to measure in style then you need one of these General Radio 1551 SPL Meters. The radio shack may be light weight but it ain't got no style. 
None 
Nada 
Nyet
forget about it
Wow!


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CBias Resistors Their Placement and Value Radio News 1930

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TALKING HEADS LIVE 1980