Old School Cool! My Grandfather used this HP 45 calculator for many years, including on a Space Shuttle related project. Now its time to give it a new lease on life.<br /><br />This vintage HP 45 calculator was given to me by my grandfather a few years ago. It has no battery and I can clearly see that is because it leaked. In this HP calculator repair, we will take it apart and make sure everything is looking solid and clean before installing a replacement battery.<br /><br />One feature I like is that this is a RPN (Reverse Polish Notation) calculator. I have used an HP 41C series RPN calculator as my daily driver since the late '80s.<br /><br />RavenWolf Retro Tech gives you a new vintage tech video each week. From Retro Computing to older tech, such as the 1917 phonograph, 1916-Kilowatt meter & 1972 Tektronix Oscilloscope I have to show you. At RavenWolf Retro Tech we explore & restore vintage technology every week. <br /><br />I will be giving you new videos as I can until the shop is completed. After that, I will release a new video every week. <br /><br />Subscribe: <br /><a href="https://www.youtube.com/channel/UCeZn6NJzqS-6ELUnq1cD7Zg?sub_confirmation=1" target="_blank" rel="nofollow">https://www.youtube.com/channel/UCeZn6NJzqS-6ELUnq1cD7Zg?sub_confirmation=1</a><br /><br />See future items to be restored on our website:<br /><a href="https://www.ravenwolffarm.com/cool-stuff-to-come" target="_blank" rel="nofollow">https://www.ravenwolffarm.com/cool-stuff-to-come</a><br /><br />Replacement Battery Tray on eBay<br /><a href="https://geni.us/HP_Battery" target="_blank" rel="nofollow">https://geni.us/HP_Battery</a><br /><br />DeoxIT D5<br /><a href="https://geni.us/DeoxIT_D5" target="_blank" rel="nofollow">https://geni.us/DeoxIT_D5</a><br /><br />The tools I use<br /><a href="https://www.ravenwolffarm.com/post/my-favorite-tools" target="_blank" rel="nofollow">https://www.ravenwolffarm.com/post/my-favorite-tools</a><br /><br />Twitter: @RavenwolfTech<br /><br />SOME LINKS ARE AFFILIATE links to Amazon or other websites. I am paid a small commission when you use them, it never costs you more.<br /><br />Copyright 2020, RavenWolf Productions<br /><br />#Calculator #RavenWolfRetroTech #VintageTech<br />...<br /><a href="https://www.youtube.com/watch?v=56nq_FNll6Q" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=56nq_FNll6Q</a>