====== Harley Benton PowerPlant ======
This is all about this unit: https://www.thomann.de/intl/harley_benton_powerplant.htm

{{ https://images.static-thomann.de/pics/bdb/119603/7139892_800.jpg }}

If you're planning to buy it, don't! Get the [[https://www.thomann.de/nl/harley_benton_powerplant_iso_1_pro.htm|ISO-1 Pro]], [[https://www.thomann.de/intl/harley_benton_powerplant_iso_2_pro.htm|ISO-2 Pro]] or the [[https://www.thomann.de/intl/harley_benton_powerplant_junior.htm|Junior]] one as those have isolated outputs. The blue PowerPlant doesn't. And the blue unit provides less than 9v at its outputs. Fortunately that can be improved, that's what this mod does. Bear in mind that you will void your warranty with this mod.

Update: got the Junior and tossed the blue one in the bin.

===== Rectifier mod =====
<alert type="warning">Be careful when working with 220V AC devices! \\
It is not recommended to use a modded power supply on stage!</alert>
Came across this mod here: http://forum.gitaristi.sk/index.php?topic=100117.0. It consists of adding two rectifiers (UF4004 in my case), a 330nF film cap and cutting some ground tracks. The result is that the outputs will provide slightly over 9V instead of the default 8.5V.

{{ :mods:lower_voltage.jpg?nolink&600 }}

First I desoldered the L7809CV 9V voltage regulator as I wanted to reuse it.
{{ :mods:desoldered_regulator.jpg?nolink&600 }}

Then I cut the ground tracks on both sides of the PCB.
{{ :mods:cut_tracks1.jpg?nolink&600 }}

On the downside the cut is underneath the added UF4004 rectifier on the right. You can also see the 330nF cap I added here.
{{ :mods:rectifiers_cap.jpg?nolink&600 }}

And another pic of the film capacitor.
{{ :mods:film cap.jpg?nolink&600 }}

Let's see if the mod did its job.
{{ :mods:higher_voltage.jpg?nolink&600 }}

Great, that look's better. Maybe I'm going to add something like a heat sink later on because apparently the 9V voltage regulator can get very hot when connecting multiple effects.