Description: Offered is an updated Superior Model 76 Bridge / Signal Tracer now in very good working condition. The second photo show the Model 76 working as a capacitance (aka condenser) tester. The capacitor is a precision 1% 0.01uF film capacitor and the tester shows about 0.01025uF. I can't guaranty that the unit will be that accurate throughout all the scales and scale ranges. Please refer to photos for the cosmetic condition. Work done:1. All electrolytic and wax paper capacitors replaced. The main filter cap was upgraded from the original (10uF, 150V) to 10uF, 200V because, with modern wall power (a true 120 Vac), the DC supply now runs at 165V!2. All three original "precision" calibration capacitors (at this point they are, at best, far out of calibration) were replaced with new ones that were accurate to 1.5% or better with respect to their stated rating. Some were identical to the capacitor tested in the photo. 3. A number of out of compliance resistors were replaced. 4. The five connectors were upgraded to four 4mm banana plugs and one BNC (for the signal input). A standard oscilloscope probe works just fine. No high frequency probe is included. 5. All functions tested.6. Exterior cleaned up. Important Notes: 1. For signal tracing one can use either a headphone set or the magic eye tube (but not both at the same time because the headphone jack, when plugged in, disconnects the signal to the magic eye tube). For the magic eye to work properly, one needs an AC rms voltage for the audio signal to be above approximately 100 mV. 2. Capacitor leak testing: This piece of equipment was manufactured during the high voltage vacuum tube era. The leak tester employs a 150 Vdc output! Thus it can only be used with caps with equal or higher voltage ratings. More importantly, any end user must always make sure a tested cap is fully discharged thereafter or there can potentially be a lethal voltage remaining on said capacitor. 3. I did not use a tube tester to assess the state of the three vacuum tubes but, as can be seen, all are working well enough. 4. For much, but not all of the available ranges, the resistance and capacitance measurements are quite decent (usually better than 5%). Also included:1. A pair of 4mm banana plugs with test clips2. A mono headphone jack which, if one uses a modern stereo pair of headphones, will only energize the left audio earpiece. 3. A printed low resolution copy of the user manual. In general the model 76 is easy to use. This item comes with a 30 day return; buyer pays return shipping. Thanks for looking
Price: 119 USD
Location: Madison, Wisconsin
End Time: 2025-01-05T16:05:56.000Z
Shipping Cost: 3 USD
Product Images
Item Specifics
Restocking Fee: No
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Brand: SUPERIOR
Type: C.R. BRIDGE & SIGNAL TRACER
