Tektronix 645


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Gradicule off

HORZ. SECTION.

VERT , SECTION

VERTICAL replaced 1 bad CAP was here.

connected to ECU crank sensor. uising my engine simulator.

new scale LEDs , 2v rated, in series and with 220 ohm resisitor 1/4w

just LEDs 5v rated.

Completed ,4 LED, for 100 year, life and never again 4 hours labor to change out. these LED are 5vdc not 2v. so wire directly with no resistors. The LED fit perfectly in side the front panel machined holes, amazing.

the LED will last forever, i have digital clocks i built back in 1975 that still operated. Using 7-seg LED.

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