Tait T850 II Series User Manual

M850-00 T858/859 Initial Adjustment D3.7
Copyright TEL 31/09/98
3.5 T858 High Temperature Shutdown Power Level
Note 1:
The temperature shutdown circuit is factory set to approximately 130°C and
20W. RV69 and RV74 should not be readjusted if normal operation is
required.
Note 2:
This Section applies only to T858 PAs, and T859 PAs with serial numbers
prior to 217262.
Power up the T858 and adjust RV63 (front panel power control) for the normal
operating power level.
Turn RV69 (shutdown temperature) fully anticlockwise to avoid RF power cycling
between the levels set by RV63 and RV74.
Apply heat to the NTC (R72) with the tip of a soldering iron.
Adjust RV74 (shutdown power level) to the desired level. For continuous opera-
tion during fault conditions, set the shutdown power to 20W.
Adjust RV69 so that the voltage at IC1 pin 13 is 380mV.
3.6 T859 High Temperature Shutdown Power Level
Note 1:
The temperature shutdown circuit is factory set to approximately 130°C and
40W. RV74 should not be readjusted if normal operation is required. Tem-
perature adjustment is not provided on the T859.
Note 2:
This Section applies only to T859 PAs with serial numbers from 217263
onwards. For T859s with serial numbers prior to this refer to Section 3.5
above.
Power up the T859 and adjust RV69 (driver power level) and RV63 (front panel
power control) for the normal operating power level.
Apply heat to the NTC (R72) with the tip of a soldering iron.
Adjust RV74 (shutdown power level) to the desired level. For continuous opera-
tion during fault conditions, set the shutdown power to 40W

Tait T850 II Series Specifications

General

Brand	Tait
Model	T850 II Series
Category	Accessories
Language	English