A New High Voltage Power Board for the Heathkit SB-200 Part 2

The is the second article in a 2 part series detailing assembly and installation of the Harbach PM-200 HV power supply board for the Heathkit SB-200.

The is the second of a 2 part series detailing assembly and installation of the Harbach PM-200 replacement board for the Heathkit SB-200. Part 1 can be found here.

Old HV Board PIC
Old HV PCB
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A New High Voltage Power Board For the Heathkit SB-200

This is Part 1 of a 2 part series showing the construction and installation of the Harbach PM-200 Replacement Power Supply in the Heathkit SB-200.

Harbach PM-200 PIC

Background

Recently I purchased a used Heathkit SB-200 amplifier from the DELARA radio club and after letting is sit on a shelf for a few months, I fired it up and immediately noticed problems. With a fair amount of troubleshooting, I discovered the HV power supply board was definitely not up to snuff.

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A Dirty TX Relay on a Clean Heathkit SB-200

I recently purchased a used Heathkit SB-200 from the DELARA Radio Club. After letting it set around unused for a number of months unused, I experienced some pesky SWR issues on the ICOM-7300.

SB-200 Front Pic
HeathKit SB-200
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WinLink HF Ardop – FT991a Transmit Addendum

After posting the Winlink HF Ardop – An Illustrated Guide I received feedback from multiple hams having difficulty getting Winlink Express to key the radio. Below is a quick addendum to the guide.

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