---
title: "More PSU Stuff"
type: "article"
slug: "more-psu-stuff"
url: "http://localhost/article/more-psu-stuff/"
markdown_url: "http://localhost/article/more-psu-stuff.md"
published_at: "2026-01-21T16:13:59+00:00"
modified_at: "2026-01-21T16:13:59+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Barry Washington reports a burnout of a diode in a modified QL Power Supply Unit (PSU). See \"Tweak & Tinker\" in the October 1990 CATS newsletter describing the use of \"spare\" extra diodes from a modified QL PSU for dropping the voltage delivered to the QL."
category:
  - name: "CATS Newsletter"
    slug: "cats-newsletter"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/cats-newsletter/"
post_tag:
  - name: "QL"
    slug: "ql"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ql/"
model:
  - name: "Sinclair QL"
    slug: "sinclair-ql"
    taxonomy: "model"
    url: "http://localhost/model/sinclair-ql/"
indiv:
  - name: "Herb Schaaf"
    slug: "herb-schaaf"
    taxonomy: "indiv"
    url: "http://localhost/indiv/herb-schaaf/"
publication_r:
  id: 35941
  title: "CATS Newsletter"
  type: "periodical"
  url: "http://localhost/periodical/cats-newsletter/"
authors_r:
  - name: "Herb Schaaf"
    slug: "herb-schaaf"
    taxonomy: "indiv"
    url: "http://localhost/indiv/herb-schaaf/"
volume: "9"
issue: "7"
issues_articles:
  - id: 38937
    title: "CATS v9 n7"
    type: "issue"
    url: "http://localhost/issue/cats-v9-n7/"
pages: "8"
pubdate: "December 1991"
product_reviews:
  - id: 12603
    title: "FD-68 Floppy Disk Interface"
    type: "product"
    url: "http://localhost/product/floppy-disk-interface-3/"
archive_link: false
---

# More PSU Stuff

[Barry Washington](http://localhost/indiv/lebaron-washington/) reports a burnout of a diode in a modified QL Power Supply Unit (PSU). See “Tweak & Tinker” in the October 1990 CATS newsletter describing the use of “spare” extra diodes from a modified QL PSU for dropping the voltage delivered to the QL.