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==Counters== | ==Counters== | ||
<gallery widths="150" heights="180"> | <gallery widths="150" heights="180"> | ||
Tek dc501 | Tek dc501 1.jpg | '''[[DC501|DC501 — 100 MHz Frequency Counter]]''' | ||
Tek dc502 opt1 1.jpg | '''[[DC502|DC502 — 550 MHz Frequency Counter]]''' | Tek dc502 opt1 1.jpg | '''[[DC502|DC502 — 550 MHz Frequency Counter]]''' | ||
Tek-dc503-front.jpg | '''[[DC503|DC503 — 100 MHz Frequency Counter]]''' | Tek-dc503-front.jpg | '''[[DC503|DC503 — 100 MHz Frequency Counter]]''' |