---
title: "64KT/64KZ"
id: 11659
type: "product"
slug: "64kt-64kz"
url: "http://localhost/product/64kt-64kz/"
markdown_url: "http://localhost/product/64kt-64kz.md"
published_at: "2019-11-30T01:20:58+00:00"
modified_at: "2026-03-22T13:20:24+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2020/12/Independence-Research-RAM.jpg"
excerpt: "64K RAM upgrades which mount inside the TS 1000 or ZX81. Installs in a minute with no soldering, and easy to follow instructions. Disable the 10-12K, 8-12K, or 8-16K areas of memory with a switch. Models specific to the ZX81 and TS 1000."
category:
  - name: "RAM"
    slug: "ram"
    taxonomy: "category"
    url: "http://localhost/category/hardware/ram/"
post_tag:
  - name: "Independence Research"
    slug: "independence-research"
    taxonomy: "post_tag"
    url: "http://localhost/tag/independence-research/"
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
  - name: "ZX81"
    slug: "zx81"
    taxonomy: "post_tag"
    url: "http://localhost/tag/zx81/"
model:
  - name: "Sinclair ZX81"
    slug: "zx81"
    taxonomy: "model"
    url: "http://localhost/model/zx81/"
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
genre:
  - name: "Hardware"
    slug: "hardware"
    taxonomy: "genre"
    url: "http://localhost/type/hardware/"
  - name: "RAM"
    slug: "ram"
    taxonomy: "genre"
    url: "http://localhost/type/ram/"
company:
  id: 10948
  title: "Independence Research"
  type: "company"
  url: "http://localhost/company/independence-research/"
price: 115
date: 1983
rarity: "Uncommon"
adverts:
  - publication:
      - id: 26653
        title: "SYNC v4 n1"
        type: "issue"
        url: "http://localhost/issue/sync-v4-n1/"
    advert_page: "36"
companies_products:
  - id: 10948
    title: "Independence Research"
    type: "company"
    url: "http://localhost/company/independence-research/"
---

# 64KT/64KZ

64K RAM upgrades which mount inside the TS 1000 or ZX81. Installs in a minute with no soldering, and easy to follow instructions. Disable the 10-12K, 8-12K, or 8-16K areas of memory with a switch. Models specific to the ZX81 and TS 1000.

- ![Image](http://localhost/wp-content/uploads/2020/12/Independence-Research-Ad-Sync-Volume-4-Number-2-994x1024.jpg)
- ![Image](http://localhost/wp-content/uploads/2020/12/Independence-Research-RAM.jpg)