Installation of a cheap amp module that will nearly remove the loud BUZZ most Vectrexes have from factory (from 1982)
DO NOT follow this video to mod your Vectrex if you-
A. Can't solder and B. Have no common sense.
The reason for the buzz was poor shielding around the audio cable and where the amp is on the vectrex pcb (near other stuff interfering with it).
BTW - I take no responibility for your actions.
Charles Tweedy sells an excellent no solder kit to do a similar thing. Get it here - https://www.ebay.co.uk/itm/VECTREX-BUZZ-OFF-Mod-Kit-Pre-Soldered-WITH-VOLUME-FIX-KIT-REMOVES-BUZZ-SOUND/153835442410?hash=item23d14e90ea:g:8aQAAOSwHYVabSD6