Tektronix 3A3 500kHz Dual-Trace Differential Amplifier Plug-In (1969)

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Tektronix Catalog CostLow BidHigh Bidaverage
$850 (1969)
$950 (1973)
...
$14.95 12/19/02 #1926251828 cybertech1*netrax.net (1 bid)
$19.95 3/17/03 #2514973673 npcheng (untested-in original carton-like new) (1 bid)
$9.95 6/21/04 #3823279167 dansjr (1 bid) (was working)
$6.50 (+~$11 ship) 12/11/06 #270064300388 michael8431 (3 bids $0.99 start) (untested - broken knob)

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