Hello,

I found this in a dump:


Does anyone know what this is ?

Thank for any help.

 

It's a bridge for a transducer like a strain gauge or thermocouple. To avoid drift, a low frequency AC (chopped) signal is used instead of DC.

Looks pretty clean.....well worth fixing up if it needs fixing.

 

Thank you.

It actually works, I managed to use the left part of the 'Bridge Supply' selector with a Wheatstone bridge, but I have no idea how to use the right part, the half-bridge...

It's pretty big, I wonder what kind of application needs that (unless there are no other choices back in the days ?).

 

Hello,

I found this in a dump:
View attachment 107804 View attachment 107805

Does anyone know what this is ?

Thank for any help.

Here's a link to a data sheet: http://helmut-singer.de/pdf/phpr9307.pdf

 

Thank you.

It actually works, I managed to use the left part of the 'Bridge Supply' selector with a Wheatstone bridge, but I have no idea how to use the right part, the half-bridge...

It's pretty big, I wonder what kind of application needs that (unless there are no other choices back in the days ?).

+You haven't seen a big bridge till you've lugged around a General Radio 916.

 

http://www.seed-solutions.com/gregordy/Amateur Radio/Experimentation/RFBridges.htm
Some fun stuff for you!