BIRD THRULINE 43 Series, Instruction Book

Page: 49 / 66

Certainly if the absorption wattmeter has gone for years since its last
calibration, or is reasonably suspected of inaccuracy, it may well be calibrated
against the Thruline Wattmeter as the standard. Rather than use correction
factors, one can, with Termaline Wattmeters, make use of the calibration
adjustment screws used in factory calibration. These are concealed and not
mentioned in the instruction book to discourage tampering. Consult the
factory before changing the adjustment.
If such calibration is undertaken, care and thoroughness are advised.
Model 43 Replacement Parts List
Item Qty. Description Part Number
1 1 Housing Assembly 4210-018
2 1 Cover Assembly 4210-005-1
3 1 Line Section Assembly 4230-018
4 1 Carrying Strap 8580A003
5 1 Dust Plug, Aluminum 3610-031
6 1 DC connector Assembly 4230-010
7 1 Microammeter 2080-002
8 1 DC Connector 7500-076
9 1 Coaxial Cable Assembly 4220-097-1
10 2 Turnbutton 4300-015
11 2 Spring Washer 5-1144-1
12 8 Rubber Stem Bumper 5-1388
13 2 Pushnut 5-1076-1
14 1 Replacement Meter Kit consisting of:
1 Meter
1 Cable Assembly
3 Bumper Feet 8-000
2080-002
4220-097-1
5-040
15 2 RF Connectors *See List on
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Maintenance
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