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!

ES4AC-4 AC-4 Power Supply Rebuild Kit


SKU: ES4AC4 Category:


The ES4AC-4 power supply rebuild/upgrade kit is a complete consisting of two (2) pre-populated PC boards along with all required wiring and mounting hardware included to rebuild the Drake AC-4 power supply. This kit was designed and manufactured by Paul Kraemer, K0UYA, of Electronic Specialties in Fairfield IA and distributed by Harbach Electronics, LLC.  Complete instructions, pictures and other documentation can be downloaded from the “Downloads” section of the website.

Additional information

Weight 0.61 lbs
Dimensions 5.75 × 3.75 × 2.75 in