Found the restoring video of this thing: it is an HP 150A:
Thanks for posting that, I did watch the first part some time ago and skipped through most of it, as sanding & painting it was not very interesting to me, plus he painted the wrong color. ![Face Palm :palm:](https://www.eevblog.com/forum/Smileys/default/facepalm.gif)
Watched the other three parts last night, much better
David
Thank you so much for the link, just like you I had seen only the first episode but got a bit put off by it, now I watched the rest and they where quite good!
They did achieve one other thing for me: I'm totally put off buying a vacuum tube oscilloscope after seeing all that, I would not have the patience to repair such a beast!
And just as mansaxel writes here below another good reason is the electricity prices!
Currently as I'm writing this it's almost at 10SEK or around 90€/$ cents including taxes!!!
At least it has motivated me to setup a Home Assistant module that shuts off my water heater, and come winter when heating will be required the heater too based on hourly electricity rates:
...snip...
Topic discussion: Old TE is energy inefficient. Having large power costs influences the Addiction. Besides, electricity is sort of on-topic. I hope.
It's definitely not a scope for Summer use, but this & many other hollow state TE double as fan heaters, 10MHz is enough for Winter isn't it?
![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif)
The HP 150A I have, original owner must have been the US Navy, judging by all the labels.
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1568371)
The 6¼A fuse for operation from 115V.
![Shocked :o](https://www.eevblog.com/forum/Smileys/default/shocked.gif)
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1568377)
Took some pictures of the HV module, still waiting to be reunited with the scope, still has a couple of mixed dielectric? Sprague black beauties, that should probably be replaced.
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1568389)
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1568395)
The 150AR I have (first picture was taken by the last owner), original owner was N.P.L. , google that & you get National Physical Laboratory, but I can't confirm they were the N.P.L. on the label.
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1568407)
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1568413)
The Tek Museum are looking for a HP 150A for their collection.
https://vintagetek.org/home-2/David