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	<title>power supply &#8211; FXdoctor Custom Effects</title>
	<atom:link href="https://www.fxdoctor.com/tag/power-supply/feed/" rel="self" type="application/rss+xml" />
	<link>https://www.fxdoctor.com</link>
	<description>Custom guitar effects and modifications</description>
	<lastBuildDate>Tue, 24 Feb 2026 12:41:27 +0000</lastBuildDate>
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		<title>MXR ISO-Brick and Pedaltrain Classic Jr</title>
		<link>https://www.fxdoctor.com/mxr-iso-brick-and-pedaltrain-classic-jr/</link>
					<comments>https://www.fxdoctor.com/mxr-iso-brick-and-pedaltrain-classic-jr/#respond</comments>
		
		<dc:creator><![CDATA[Joshua]]></dc:creator>
		<pubDate>Tue, 24 Feb 2026 12:41:25 +0000</pubDate>
				<category><![CDATA[DIY]]></category>
		<category><![CDATA[Gear Related]]></category>
		<category><![CDATA[iso-brick]]></category>
		<category><![CDATA[Pedalboard]]></category>
		<category><![CDATA[pedaltrain]]></category>
		<category><![CDATA[power supply]]></category>
		<guid isPermaLink="false">https://www.fxdoctor.com/?p=1799</guid>

					<description><![CDATA[I&#8217;m a big fan of the Pedaltrain Classic Jr for being lightweight and having a reasonable stage footprint but the lack of mounting options for a power supply is really disappointing. This board can easily hold 10 pedals so it&#8217;s &#8230; <a href="https://www.fxdoctor.com/mxr-iso-brick-and-pedaltrain-classic-jr/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
										<content:encoded><![CDATA[
<p>I&#8217;m a big fan of the <a href="https://amzn.to/4kQjllr">Pedaltrain Classic Jr</a> for being lightweight and having a reasonable stage footprint but the lack of mounting options for a power supply is really disappointing. This board can easily hold 10 pedals so it&#8217;s not unreasonable to want to use an isolated power supply rather than just daisy chaining the pedals. Here&#8217;s the materials I used to mount an <a href="https://amzn.to/4ccq8ng" data-type="link" data-id="https://amzn.to/4ccq8ng">MXR ISO-Brick</a> -and what I&#8217;d do differently- if I were to do it again.</p>



<figure class="wp-block-image size-full"><a href="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00001.jpeg"><img fetchpriority="high" decoding="async" width="640" height="480" src="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00001.jpeg" alt="" class="wp-image-1787" srcset="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00001.jpeg 640w, https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00001-300x225.jpeg 300w" sizes="(max-width: 640px) 100vw, 640px" /></a></figure>



<p>Here&#8217;s our starting point. Velcro already on the board so I made a few cuts where the mounting screws will go.</p>



<figure class="wp-block-image size-full is-resized"><a href="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00002.jpeg"><img decoding="async" width="640" height="480" src="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00002.jpeg" alt="" class="wp-image-1788" style="width:643px;height:auto" srcset="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00002.jpeg 640w, https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00002-300x225.jpeg 300w" sizes="(max-width: 640px) 100vw, 640px" /></a></figure>



<p>We&#8217;ll be using a piece of aluminum flat bar as a mounting bracket, so holes on the pedalboard are spaced to fit the flat bar. Here I used four #6 countersunk screws, 3/4&#8243; in length because I had them around but any small screw will work here.</p>



<figure class="wp-block-image size-full"><a href="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00003.jpeg"><img decoding="async" width="640" height="480" src="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00003.jpeg" alt="" class="wp-image-1789" srcset="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00003.jpeg 640w, https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00003-300x225.jpeg 300w" sizes="(max-width: 640px) 100vw, 640px" /></a></figure>



<p>Mounting bracket was purchased from eBay- it&#8217;s a 1/2&#8243; thick piece of aluminum flat bar that&#8217;s 3&#8243; wide and 6&#8243; long. Aluminum flat bar comes unfinished so plan on time to paint after drilling if you care about that. I needed about 3/8&#8243; of clearance so the power cables will have clearance over the support bars so I went with a 1/2&#8243; to be safe. I&#8217;d recommend getting a 0.125&#8243; or .250&#8243; plate and using spacers to get the correct clearance since this bracket is unnecessarily heavy. It&#8217;s attached using locking nuts.</p>



<figure class="wp-block-image size-full"><a href="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00005.jpeg"><img loading="lazy" decoding="async" width="640" height="480" src="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00005.jpeg" alt="" class="wp-image-1791" srcset="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00005.jpeg 640w, https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00005-300x225.jpeg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /></a></figure>



<p>Here&#8217;s a test fit of the ISO-Brick. </p>



<figure class="wp-block-image size-full"><a href="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00006.jpeg"><img loading="lazy" decoding="async" width="640" height="480" src="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00006.jpeg" alt="" class="wp-image-1792" srcset="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00006.jpeg 640w, https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00006-300x225.jpeg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /></a></figure>



<p>And here is a picture showing the cable clearance when using a 1/2&#8243; thick mounting bracket.</p>



<figure class="wp-block-image size-full"><a href="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00007.jpeg"><img loading="lazy" decoding="async" width="640" height="480" src="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00007.jpeg" alt="" class="wp-image-1793" srcset="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00007.jpeg 640w, https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00007-300x225.jpeg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /></a></figure>



<p>The ISO-Brick has two screws keeping the enclosure together. What&#8217;s really nice is these screws go straight through the chassis and if I replace them with longer screws I can use them as a mounting point for the power supply to the bracket. The stock screws are hex (allen) socket M4-0.7 x 40mm. I replaced them with stainless <a href="https://amzn.to/4kRehgt">M4-0.7 x 60mm</a> which gives the result above.</p>



<figure class="wp-block-image size-full"><a href="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00008.jpeg"><img loading="lazy" decoding="async" width="640" height="480" src="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00008.jpeg" alt="" class="wp-image-1794" srcset="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00008.jpeg 640w, https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00008-300x225.jpeg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /></a></figure>



<p>View from above of where it&#8217;s at so far. Bracket is attached, holes are drilled for the power supply mounting screws, and it&#8217;s ready to finish this up.</p>



<figure class="wp-block-image size-full"><a href="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00010.jpeg"><img loading="lazy" decoding="async" width="640" height="480" src="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00010.jpeg" alt="" class="wp-image-1796" srcset="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00010.jpeg 640w, https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00010-300x225.jpeg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /></a></figure>



<p>The power supply fits, there&#8217;s enough clearance for the cables, the power supply isn&#8217;t so tall that it touches the ground when the pedal is flipped over.</p>



<figure class="wp-block-image size-full"><a href="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00011.jpeg"><img loading="lazy" decoding="async" width="640" height="480" src="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00011.jpeg" alt="" class="wp-image-1797" srcset="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00011.jpeg 640w, https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00011-300x225.jpeg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /></a></figure>



<p>Two M4 nuts to hold the power supply to the bracket.</p>



<figure class="wp-block-image size-full"><a href="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00012.jpeg"><img loading="lazy" decoding="async" width="640" height="480" src="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00012.jpeg" alt="" class="wp-image-1798" srcset="https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00012.jpeg 640w, https://www.fxdoctor.com/wp/wp-content/uploads/2026/02/PB00012-300x225.jpeg 300w" sizes="auto, (max-width: 640px) 100vw, 640px" /></a></figure>



<p>And a view from the back of the pedalboard showing that there&#8217;s enough clearance to allow the power cable to be unplugged if needed.</p>



<p>So this is everything- 6 screws and a lot of measuring to make sure the clearances all would work. The big takeaway would be to get a 0.125&#8243; or 0.250&#8243; at the most for the aluminum plate thickness and use washers or spacers to give the clearance needed to reach about 1/2&#8243;. Without that clearance you won&#8217;t be able to plug power cables into the power outlets of the ISO-Brick. If using a thinner plate you&#8217;ll also want to get shorter M4-0.7 x 60mm screws for the power supply itself, likely 55mm depending on the thickness of your plate. </p>
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