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 for 30-60 days or 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 will be back but it will be a little while. If you wish to order Dean Jacobs racing gear, please email me at and send me your phone number and I will contact you and process your order.
You can still view products, but no orders are being taken at this time. Sorry for the inconvenience!

SS-100-240 Universal Soft-Start Module


SKU: SS100-240 Category:


The SS-100-240 performs the same functions as the SS-201 or SS-221, but is designed to be installed in any amplifier or vintage radio. The soft-start mounts inside the amplifier or radio and safely limits inrush current to protect hard-to-find and costly-to-replace switches, tubes, filter capacitors and high voltage transformers.  The kit is for equipment operating from 240 VAC mains and includes power resistors for 240VAC mains operation (20Ω 10 watt).

Additional information

Weight 0.32 lbs
Dimensions 5.5 × 3.5 × 1.0 in