Tube amp for your watch?!

[Noel Grassy]

This is going to be gone in a few hours but I'd never believed it if I didn't see it for myself. Western Electric tube amp to listen to the movements in a watch..[IMG:640:480]http://i145.photobucket.com/albums/r222 ... pByAme.jpg[/img] It really does look "museum quality" with it's attractive sheet metal bonnet. I don't know what the little "seismic" roll of paper does though. Anybody ever seen one of these? Here's the link if you're fast enough. http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... otohosting

[tele_player]

Actually, the chart recorder's use is pretty obvious... it keeps a log of noise detected over time.So, a watchmaker would know if the watch makes a noise every minute, hour, randomly... which could be useful in troubleshooting.
Or, a watchmaker could supply the chart to a customer, saying "See, this watch is totally silent 24x7"

Very neat gadget - in a useless kind of way. Cool to know such things once existed.

[skyboltone]

I've seen modern equivalents. When rating a watch, (setting it slow/fast) the jeweller/watchmaker gets a print out on a graduated sheet. He can set the advance/retard wheel accordingly.