Tektronix 475 200 MHz Dual Trace Oscilloscope

475 200 MHz Dual Trace Oscilloscope

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Orig Cost	Low Bid	High Bid	average
$2500 (1973-new) $3000 (1977) $3960 (1982)	.	.	.
$300.00 1/12/03 #3105555653 geotronics (tested-looks good) (22 bids $50 start) $255.00 3/22/03 #2516300505 deedae (w/3 probes,manual,cover-tested) (15 bids $10 start) $140.27 (+$25 ship) 7/10/07 #280131004546 washington-state-surplus (10 bids $9.99 start) (untested-some trace) $67.52 (+$45 ship) 7/14/07 #290137052931 naturesmooth (17 bids $19 start) (tests ok)

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Features:

DC TO 200 MHz BANDWIDTH -- Conservatively rated, in the Tek tradition.

DUAL TRACE - Chopped or alternately displayed.

5mV/DIV - 50V/DIV VERTICAL - Enough sensitivity to test microphones, and enough range for vacuum tube circuitry too. Also with Tek's good overload protection, it can handle sunstantial overvoltage without frying the inputs.

0.01USEC/DIV TO .5s/DIV HORIZONTAL - Speedy enough so you can watch short glitches.

TIMES 10 SWEEP MAGNIFIER -- Even more expansion for watching extra closely.

Dual sweeps, DELAYED or EXPANDED SWEEPS- Nice ten-turn knob so you can slide along the waveform at your leisure.

TRIGGER VIEW-- Pull a knob and watch what the trigger circuit is seeing-- great for optimizing triggering levels and bandwidths.

A cornucopia of triggering and sweep options!

8.10 cm CRT-- Big enough so those of us with old eyeballs can read it from across the room.

Special note to young folks: If you're only using a digital scope, you're missing out. There's a whole underworld of little bits of noise, hum, and glitches that your digital scope is just glossing over. Get a real good analog scope for those times when your digital scope isnt giving you the amount of detail you need.