08-26-2014, 04:32 PM
Gregb;
Will do.
Yesterday I tried using an external audio signal generator to drive the Heathkit IB-2A impedance bridge, but found that at frequencies below about 600Hz the output of the generator was insufficient to drive the bridge to levels where it could be calibrated following the operating instructions of the bridge. I will have to use an amplifier to build up the signal to a higher level before I can complete those tests.
Joe
I spent some time today cleaning the bottom cover of the amp and put some clear plastic feet on it that will raise it about 3/8 of an inch above the surface it rests upon. This part of the outer sheet metal is pretty badly pitted and there are some spots of rust showing, but overall it still looks far better than it did to begin with.
Joe
Will do.
Yesterday I tried using an external audio signal generator to drive the Heathkit IB-2A impedance bridge, but found that at frequencies below about 600Hz the output of the generator was insufficient to drive the bridge to levels where it could be calibrated following the operating instructions of the bridge. I will have to use an amplifier to build up the signal to a higher level before I can complete those tests.
Joe
I spent some time today cleaning the bottom cover of the amp and put some clear plastic feet on it that will raise it about 3/8 of an inch above the surface it rests upon. This part of the outer sheet metal is pretty badly pitted and there are some spots of rust showing, but overall it still looks far better than it did to begin with.
Joe
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