General Radio Company 916-AL Other
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Model:
916-AL
Date:
1967
Category:
Group:
Description:
Radio-Frequency Bridge
Information
The Type 916-AL Radio-Frequency Bridge is a null instrument
for use in measuring impedance at frequencies from 50 kc to
5 Me. The low-frequency limit is mainly determined by
sensitivity considerations and in most cases measurements
can be made with slightly decreased accuracy at frequencies
as low as 15 kc. Measurements can also be made at
frequencies somewhat above the nominal upper limit with
decreased accuracy and sensitivity.
The bridge is used with a series-substitution method for
measuring an unknown impedance, Zx, in terms of its series
resistance component, Rx, and series reactance component,
Xx. The resistance is read from a variable-capacitor dial
directly calibrated in resistance (in ohms). The reactance
is read from two variable-capacitor dials directly
calibrated in reactance at 100 kc. The resistance dial
reading is independent of frequency. The readings of the
reactance dials increase linearly with frequency. For
frequencies other than 100 kc the reactance dial readings
must therefore be divided by the operating frequency in
hundreds of kilocycles. The resistance dial reads from 0 to
1000S2; the main reactance dial from 0 to 11,000ft; and the
incremental reactance dial from 0 to 100ft at 100 kc.
Manual type:
Service and User Manual
Pages:
20
Size:
9.07 Mbytes (9505880 Bytes)
Language:
english
Revision:
Manual ID:
0916-0100-H
Date:
1967 02 01
Quality:
Scanned document, all readable.
Upload date:
2016 12 30
MD5:
6074810372ecfe651da058bced841d83
Downloads:
654
Information
1.0
DESCRIPTION ... * ... 1
1.1 General
Description ... 1
1.2 Basic Circuit and Balance Conditions ... 1
1.3 Complete
Circuit ... 2
1.4 Panel Layout and
Controls ... 2
1.5 Accessories Supplied
... 3
2.0
OPERATION ... 3
2.1
Generator ... 3
2.2
Detector ... 3
2.3 Grounding
... 4
2.4 Stray Pickup
... 4
2.5 Transformer
Installation ... 5
2.6 Initial
Balance ... 5
2.7 Measurement of Unknown Impedance ... 5
3.0 CHECKS AND
ADJUSTMENTS ... 13
3.1 Resistance Calibration .
... 13
3.2 Correction for Dielectric Loss in Reactance
Capacitor ... 13
Wiring Diagram for Type 916-AL Radio-Frequency Bridge