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The 513 (and 513D) contains a distributed vertical output amplifier | The 513 (and 513D) contains a distributed vertical output amplifier | ||
made of [[6CB6]] tubes. | made of [[6CB6]] tubes. | ||
<gallery> | |||
Image:Tek 513d.jpg | |||
Image:Tek 513d 2.jpg | |||
</gallery> |