I purchased these Harbach Electronics Amplifier upgrade kits at a local hamfest, intending to update my Heathkit SB-200 Amplifier. But I updated my Drake L-4B Amplifier, instead, and don't need these SB-200/201 kits. 1) The complete PM-200 Power Supply kit, with new circuit board, all parts, including the six-new electrolytic capacitors. $85 2) The SS-201 Soft-Start, this one is intended for use with 240V AC Input. The instructions say that if 120V AC Input is used, the four - 20-ohm, 10W resistors need to be changed to 10-ohm, 10-Watt resistors. The currently-offered SS-201-240 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 240 VAC mains and includes power resistors for 240VAC mains operation (20Ω 10 watt). $25 3) The RY-200 is a Replacement T/R Relay for the SB-200/201, with the resistor to make the amp work properly with the new relay. $25 4) The FM-200 Replacement Fan and Motor, with all brackets and hardware. $45 I also have an SK-401 Soft-Key kit for a Drake L-4/L-4B Linear Amplifier, which lowers the amplifier's keying voltage from the original +120VDC down to about +0.7VDC, so it can be safely keyed by modern solid-state radios. $25 All prices shown include USPS shipping to CONUS locations. Payment by check or money order, no PayPal, no trades.