Telkit is designed for Minecraft 1.7.10.
It is available on the Technic Launcher. The current release of Telkit is version 5.1.4, released on Saturday, April 7, 2018.

Custom Sphax Patches (In Menu Loading Order, Top to Bottom)
Sphax PureBDcraft Modded Textures for Telkit - March 22, 2018 for Telkit 5.1.2+
Default
These patches are notorious for not working if Telkit is allocated less than 10 GB of RAM.

Basic Prerequisites
Technic Launcher
Java Runtime Environment 8u172 x64 - Windows - macOS - Linux

Vanilla Minecraft Packs Compatible with Telkit
VoxelBox Scientific HD (1.6.1+) - superseded by NosLabs Custom Blocks mod
Original NosLabs Resource Pack (1.6.1+) - superseded by NosLabs Custom Blocks mod