---
title: "John Mathewson"
id: 20338
type: "company"
slug: "john-mathewson"
url: "http://localhost/company/john-mathewson/"
markdown_url: "http://localhost/company/john-mathewson.md"
published_at: "2019-11-30T15:34:06+00:00"
modified_at: "2024-01-14T10:28:53+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2019/11/20230604-070814.jpg"
excerpt: "Custom keyboard and cartridge expansion connector. John Mathewson was president of the Ottawa-Hull Timex Sinclair User Group for a number of years. He developed a number of unique accessories for the TS 2068, including external keyboards and an adapter to allow use of cartridges via the rear expansion buss."
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address: "1852 Appleford St., Gloucester, Ontario K1J 6T4 Canada"
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    title: "John Mathewson catalog"
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    title: "Time Designs Magazine v4 n2"
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archiveorg_url: "https://archive.org/details/john-mathewson"
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---

# John Mathewson

![Image](https://ia601403.us.archive.org/35/items/john-mathewson/J%20Mathewson%20keyboard%20and%20cartridge%20adaptor.jpg)Custom keyboard and cartridge expansion connector.

John Mathewson was president of the [Ottawa-Hull Timex Sinclair User Group](http://localhost/usergroup/ottawa-hull-timex-sinclair-user-group/) for a number of years. He developed a number of unique accessories for the TS 2068, including external keyboards and an adapter to allow use of cartridges via the rear expansion buss.