Good Old italian tecnology - no more nowadays

[kagliostro]

This is a very old Geloso potentiometer

as you can see the wiper didn't touch the carbon surface

between there was a thin metal strip

turning the knob moves the contact without the parties crawl

Unfortunately, these pots are not made more

I must say I was pleasantly surprised to see something done so

Kagliostro

[PRR]

Geloso had a long history, in America also. Here's 1930 at Pilot Radio company (huge but suffered in the 1930s).
https://www.americanradiohistory.com/Radio_Design.htm
Spring V3 N1

[sith]

oh I have old G1/1110 that needs much of TLC, and I plan to restore it someday, but it's story for another time...

[shooter]

I love that it has an "infallible distortion meter" China don't got 'em 

we used a piece of equipment on the Radars that was about that big, and heavy, used for measuring waveguides.

[Tbone55]

And now we are paying the price for giving away our technology in exchange for cheap labor.

[PRR]

> turning the knob moves the contact without the parties crawl

Here's what looks like the same idea from another company.

Surely both products vanished because nobody will pay $1.50 if there is a $1 pot available.
https://www.americanradiohistory.com/Archive-Radio-Engineering/30s/1930/Radio-Engineering-1930-01.pdf

[kagliostro]

Many Thanks PRR

I like those old prints


Franco