---
title: "RTTY Send Program & Interface for the Sinclair/Timex ZX81"
type: "article"
slug: "rtty-send-program-interface-for-the-sinclair-timex-zx81"
url: "http://localhost/article/rtty-send-program-interface-for-the-sinclair-timex-zx81/"
markdown_url: "http://localhost/article/rtty-send-program-interface-for-the-sinclair-timex-zx81.md"
published_at: "2026-01-16T09:23:07+00:00"
modified_at: "2026-01-16T09:25:12+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "One of the things in operating RTTY with non-electronic gear has been the nuisance of identifying. here is a lot or repetition such as the other station's call, my call, my name and QTH. I often envied tnose that had the new fancy \"glass TTY\" units that had all of that built in. Well that…"
category:
  - name: "QZX"
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    url: "http://localhost/category/periodicals/qzx/"
post_tag:
  - name: "Hardware project"
    slug: "hardware-project"
    taxonomy: "post_tag"
    url: "http://localhost/tag/hardware-project/"
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
  - name: "Type-in program"
    slug: "type-in-program"
    taxonomy: "post_tag"
    url: "http://localhost/tag/type-in-program/"
model:
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
indiv:
  - name: "Brian Davis (W9HLQ)"
    slug: "brian-davis-w9hlq"
    taxonomy: "indiv"
    url: "http://localhost/indiv/brian-davis-w9hlq/"
publication_r:
  id: 21219
  title: "QZX"
  type: "periodical"
  url: "http://localhost/periodical/qzx/"
authors_r:
  - name: "Brian Davis (W9HLQ)"
    slug: "brian-davis-w9hlq"
    taxonomy: "indiv"
    url: "http://localhost/indiv/brian-davis-w9hlq/"
volume: "1"
issue: "12"
issues_articles:
  - id: 62167
    title: "QZX v1 n12"
    type: "issue"
    url: "http://localhost/issue/qzx-v1-n12/"
pages: "9-14"
pubdate: "November 1983"
archive_link: false
---

# RTTY Send Program & Interface for the Sinclair/Timex ZX81

One of the things in operating RTTY with non-electronic gear has been the nuisance of identifying. here is a lot or repetition such as the other station’s call, my call, my name and QTH. I often envied tnose that had the new fancy “glass TTY” units that had all of that built in. Well that it wasn’t long after I got the Sinclair ZX81 that I realized that here was my answer. Following is an outline of a program that send blocks or buffers of text at 60-wpm Baudot. Additionally I hope this will encourage others dig into to their Sinclair/Timex computers and put them to work on the ham bands.