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Registered Member #477
Joined: Tue Jun 20 2006, 11:51PM
Location: Seattle, WA
Posts: 546
Here's a new sort of "quiz" thread I thought might be amusing. Unfortunately, for my first "question", I'm afraid I don't have the correct answer handy, and am therefore more interested in what others come up with than I am in "stumping" anybody.
I recently picked up a couple of vintage instruments at a surplus auction for almost nothing, later to find out that some of them may actually be worth something. All are by Leeds & Northrup. I have identified one as a Wheatstone bridge, and another as a millivolt voltage reference. Both very interesting devices. But I have yet to identify the largest one:
Top view (click for larger image):
Interior view (click for larger image):
The smooth-turning dials under which the copper boxes are found appear likely to be capacitors; the dials are labeled "C1" and "C2". There are contacts sticking out the sides of the box, which appear to be made to hold standard resistance cells (I've placed one such cell in the holder in the first picture above so that you can see what one looks like). The multi-position switches are all different resistors, not unlike the Wheatstone bridge I got. The posts under the contacts are big wirewound resistors.
The whole thing is 24" x 24" by 10". The box appears to be mahogony, the top panel a sort of hard blackish-brown rubber. I haven't attempted to derive a schematic for the device yet, although that shouldn't be hard; the wiring is pretty easy to follow!
Any idea what it is??? I've mailed a number of shops that service old instruments like this, and nobody has replied yet.
Cheers, Aaron, N7OE
PS: They sure don't make 'em like they used to, do they?!
Registered Member #477
Joined: Tue Jun 20 2006, 11:51PM
Location: Seattle, WA
Posts: 546
atomicthumbs wrote ...
It's a 'lectric box, of course! When people couldn't afford radios, they sat in front of these, turned the dials, made static noises, then talked.
Hehehehhh...sounds about right for what *I'll* be able to do with it! As for the "couldn't afford radios" bit: Something tells me that this beast was probably at *least* as spendy as the average consumer radio in its day, despite its relatively simple appearance.
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Name That Vintage Electronic Instrument
Hehehehhh...sounds about right for what *I'll* be able to do with it! As for the "couldn't afford radios" bit: Something tells me that this beast was probably at *least* as spendy as the average consumer radio in its day, despite its relatively simple appearance.
