Replacement LM-1 Video Amplifier IC for Akai VT-100

Replacement for the LM-1 hybrid IC video amplifier used in the Akai VT-100 video recorder


This is a replacement part for one of the world’s first consumer video recorders, the Akai VT-100. These units used an early form of IC to implement the video amplifier circuit. These parts, marked LM-1, are quite prone to failure and were completely impossible to find replacements for.  That is, until now! These modern LM-1’s are my reimplementation of the original circuit (as printed in the service manual) using discrete surface-mount components.

The replacement part is exactly the same form-factor as the original except thinner. Thus, it will work as a drop-in replacement as-is or the ambitious buyer can ‘re-stuff’ it into the plastic case of the original part for a 100% authentic look.

For more information on the design of the part and the restoration of a VT-100, please see my blog post here.

Download the schematic and PCB layout for this product hereNote that these files are available for PERSONAL, NON-COMMERCIAL USE ONLY. In short, you are welcome to use them to build this product yourself, but you must contact me to work out a commission if you wish to sell anything derived from them. This product was designed in ExpressPCB so you will need to download a copy of that software from before you can view the files.


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