TB8100 Service Manual Power Amplifier Board Replacement 179
© Tait Electronics Limited September 2006
10 Power Amplifier Board Replacement
Caution Beryllium Oxide
The termination resistors used in the 100W power
amplifier contain some beryllium oxide. This sub-
stance is perfectly harmless in its normal solid form,
but can become a severe health hazard when it has
been reduced to dust. For this reason the termina-
tion resistors should not be broken open, mutilated,
filed, machined, or physically damaged in any way
that can produce dust particles. You should safely
dispose of all used or obsolete components accord-
ing to your local regulations.
Caution Touching high-power RF components or circuits
can cause serious burns. We strongly recommend
you do not touch any RF components or tracks in
the PA while it is transmitting.
Caution The TB8100 power amplifier (PA) weighs between
4.8kg (10.6lb) and 5.8kg (12.8lb). Take care when
handling the PA to avoid personal injury.
Important This equipment contains devices which are susceptible to
damage from static charges. Refer to “ESD Precautions”
on page 17 for more information on antistatic procedures
when handling these devices.
The TB8100 PA is a modular design with the circuitry divided between
separate circuit boards which are assembled in different configurations in
different models.
This chapter provides information on how to remove and replace individual
boards.
Note Unless otherwise noted, the instructions and illustrations in this
chapter refer to a 100W UHF (H-band) PA. However, the same
basic procedures and techniques apply to other models of PA.
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