Substitution box
B&K-Precision surge-protected substitution box, model 2910, is designed to eliminate problems of shock hazards, accidental discharges and the temporary healing of a defective electrolytic.
The initial surge is limited by putting a resistor in series with the substitute capacitor. After the capacitor is charged, a switch is moved to the substitute position, removing the resistor from the circuit. For added protection, an overload indicator lamp warns against substitution of a low voltage capacitor when applied voltage is over 75 VDC. Model 2910 features 36 substitution components and is priced at $50.
Multitester
Model SP-160 VOM from Sperry Instruments features a rugged shock resistant ABS plastics case; a tilted case design for easier reading; an additional X1K resistance scale; and high 100 k-o dc voltage sensitivity (10 k-o for ac); and five resistance scales (X1, X10, X100, X1K and X10K).
Dual-trace scope
Heath Company offers a low-cost, dc to 5 MHz dual-trace scope kit, the 10-4205. Features of the new scope include: a maximum vertical sensitivity of 10 mV/cm; a horizontal triggered sweep; seven calibrated time bases from 200 mS/cm to 0.2 uS/cm; and regulated vertical-amplifier and horizontal-sweep power supplies.
Other IO-4205 features include a partial mu-metal shield, an extra bright 5-inch flat-screen CRT and a lightweight durable cabinet with flush-mounted handle for easy carrying and stack-ability with other instruments.