General Radio Company 1656 Impedance Bridge For Sale

General Radio Company 1656 Impedance Bridge

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General Radio Company 1656 Impedance Bridge:

General Radio Company 1656 Impedance Bridge


BIAS jack. Voltage bias for capacitors: Apply bias only if PARAMETER switch is in Cs position. For Cp,refer to Section

2. Max voltage is 600 V dc. Add a resistor as a current limiter to prevent short circuit. Current bias for inductors:

Apply bias only if PARAMETER switch is in Lp position. For Ls, refer to Section 2.

Internal OSCillator LEVEL control.


GENERATOR switch. Turns bridge on, selects internal or external generator, ac or dc, dc zero, checks batteries.

UNKNOWN terminals. Connect unknown impedance

GUARD connection.

MULTIPLIER switch. Multiply CGRL decade setting by switch range for result.

DETector SENSitivity control.

CG R L decade: Main balance control. For greatest accuracy, choose MULTIPLIER setting for balance between 1 and 10.


DQ dial.

EXTernal DQ jack. Useful for extending DQ range with a decade box.

EXTernal GENerator jack.

Max power: 0.05 W.

Max voltage: 500 V dc; or 5 V ac rms where f is in Hz or 100 V ac rms, whichever is smaller. Frequency range for L and C: 20 Hz to 20 kHz.

DETector jack.

Useful to connect external amplifier or earphones for additional sensitivity or selectivity.


OPP ARM jack.

Connect external decade capacitor for reactive balance of resistors.

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We have a world class test equipment repair facility in-house.

Our technicians are military trained PMEL graduates certified with level 9 credentials.

They're the best of the best, so you never have to worry when you buy from us.

sale is for pictured items only

Tested Working 30 Day Warranty


  • Buyer to pay purchase price in advance.
  • After the purchase and payment of this item.We then professionally foam in place pack your unit for safe shipment. All of the care we give to your order takes time so please allow1 business day to prepare for shipment.


  • Sold with 30 day right of return if unsatisfied.


  • Within North America: Pay Pal. Major credit cards from North American banks accepted. If paying by check, unit will ship after check clears.
  • Photo is of actual item being shipped.Item is used and some minor cosmetic wear can be expected.
Contact us for expert personal service
  • To visit our website Google: BRL 0px;"="" normal;="" 0px;="" none;="" 0);="" 0,="" rgb(0,="" roman";="" new="" times="" left;="" style="font-size: 14pt; font-family: Arial;" align="center">BRL Test

    • Premium test equipment
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    BRLTest is a full service test equipment dealer.We buy, sell, rent, lease, calibrate and repair all kinds of electronic test equipment.
    We have grown a strong business over the last ten years by delivering on our promises. We invite you to join our thousands of satisfied customers.
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    For all international customers, the following terms and conditions shall apply:
    These commodities, technology, or software are to be exported from the United States in accordance
    with Export Administration Regulations. Diversion contrary to U.S. law is prohibited.Domestic customers must also agree to the following terms and conditions:
    For items shipped within the United States, BRL Test performance shall occur entirely
    within the United States. Unless expressly agreed to by BRL Test, this shall not be a routed party Buyers - Please Note: Import duties, taxes, and charges are not included in the item price or shippingcost.These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to offerding or buying.

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