Jeff Weinberg, W8CQ

Your World-Wide Source For Amateur Radio Amplifier Parts & Upgrade Kits

Your World-Wide Source For Amateur Radio Amplifier Parts & Upgrade Kits
12 July 2021: Due to a flood at my home/shop, Harbach Electronics is closed until I get this mess cleaned up and all of the damage repaired. Effective immediately I will be closed how ever long it takes to clean up and repair the damage. All pending orders will be canceled and refunded via the method of payment. I am sorry for the closure but I have to get things repaired and cleaned up. I hope to be back open around mid-October 2021.
You can still view products, but no orders are being taken at this time. Sorry for the inconvenience!

SS-201-120 Soft-Start Module


SKU: SS201-120 Category:


The SS-201-120 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 is for SB-200/201 amplifiers operating from 120 VAC mains and includes power resistors for 120VAC mains operation (10Ω 10 watt).

Additional information

Weight 0.17 lbs
Dimensions 5.5 × 3.5 × 1.0 in