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From an Estate sale...not sure what it does but it does power up. Bridge Oscillator Vintage. Condition is "Used". Very Heavy Shipped with USPS First Class.
10pcs IR2153 SELF-OSCILLATING HALF-BRIDGE DRIVER
$4.40
AjantaExport Wein Bridge oscillator Wein Bridge frequency generator
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AjantaExport Wein’s Bridge Oscillator Electrical oscillator Sine wave generation
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