18-06-2012, 07:56 PM
I've also got a TF 2700 here, which was rescued on its way to the skip at work.
It had never seemed 'quite right', often giving conflicting readings.
As an ex calibration engineer I've got a thing about reliable test gear, so I did a blanket change of all the electrolytics and carbon resistors as well as cleaning all the switches.
Although much improved it still intermittantly gave the wrong readings with certain values of component, this turned out to be R10, the 600 ohm 0.1% WW in the balance arm
So, with nothing left to lose I unwound it then re-wound it! Hoping that the poor insulation would not end up touching again. To make things more dificult it was counterwound (for low inductance) and took the best part of a morning with several yards of cotton covered resistance wire looped around the house!
However it worked
and is good reliable instrument.
Anyway, what this is leading up to is that if Laurence requires a 2.4 ohm resistor I'll stick some in the post.
Regards Mike A
It had never seemed 'quite right', often giving conflicting readings.
As an ex calibration engineer I've got a thing about reliable test gear, so I did a blanket change of all the electrolytics and carbon resistors as well as cleaning all the switches.
Although much improved it still intermittantly gave the wrong readings with certain values of component, this turned out to be R10, the 600 ohm 0.1% WW in the balance arm
So, with nothing left to lose I unwound it then re-wound it! Hoping that the poor insulation would not end up touching again. To make things more dificult it was counterwound (for low inductance) and took the best part of a morning with several yards of cotton covered resistance wire looped around the house!
However it worked
and is good reliable instrument.Anyway, what this is leading up to is that if Laurence requires a 2.4 ohm resistor I'll stick some in the post.
Regards Mike A
