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Date Posted by Category User IP

2013-11-26 (UTC)

KB8TUM

Amplifier Parts

1601ob.scansafe.net

Harbach SS201 SoftStart Heathkit SB-200 SB-201 $25

Guaranteed NEW and 100% functional upon arrival. Any problems, your money back.

This is one of several improvements offered by Harbach. The Heathkit SB-200 and SB-201 are great amplifiers, and the designers would have used these components back then but they weren't available yet! Now that they are, protect your beloved Heathkit before it's too late.

The SS-201 limits inrush current during amplifier start-up by placing a small resistive load in series with the AC mains. The load is switched out of the circuit by the relays a few milliseconds later. The soft-start mounts inside the amplifier and safely limits inrush current to protect hard-to-find and costly-to-replace ON-OFF switches, tubes, filter capacitors and high voltage transformers.
The kit includes power resistors for 220VAC mains operation. If the amp is operated on 110VAC mains, 10ohm 10W resistors should be used.

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