14-11-2016, 12:14 PM
The ultimate in bridge type testers was that General Radio Vacuum Tube Bridges. They did a series over the decades, and typical of GR they made use heavily of specialised transformers and custom differential variable capacitors. The 561-D manual is here http://www.ietlabs.com/pdf/Manuals/GR/56...Bridge.pdf
Again typical of GR you need another bunch of stuff to make it work - signal generator, DC electrode supplies and an AC null detector (or headphones). For examples http://www.vacuumtubes.com/testequipment...ridge.html and http://vintagetubeservices.com/laboratory/
As a result they are rarely used, and difficult to obtain second hand.
Again typical of GR you need another bunch of stuff to make it work - signal generator, DC electrode supplies and an AC null detector (or headphones). For examples http://www.vacuumtubes.com/testequipment...ridge.html and http://vintagetubeservices.com/laboratory/
As a result they are rarely used, and difficult to obtain second hand.
