Asymod IIIs, Installation Manual

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Stryker SR-995HPC PA Schematic
Modulator Output
NOTE:
IMPORTANT
The Asymod III offers the flexibility to choose from 3 final modulating stage transistor onboard
configurations, allowing for TO-220 or TO-247 package transistors. To avoid permanent damage to the
onboard DC/DC converter, do not exceed a 1 Watt carrier (dead key) on a single final transceiver, and
a 2 Watt carrier (dead key) for a dual final transceiver. Always check for shorts after installing the
modulating stage transistor/s to the transceiver’s chassis or heatsink with the provided hardware and
before powering up.
Although the onboard DC/DC converter can supply a maximum of 25 volts at 5 amps, it is imperative to
maintain the maximum carrier levels at 1 Watt for single final and 2 Watts for dual final transceivers to
avoid damage. However, If higher carrier (dead key) levels are required, the use of parallel or larger final
modulating stage transistors (configuration B or C) allows for cooler operation and higher RF power
levels, and if is so needed, in such cases an external 24V supply should be used, refer to Fig. 28 on page
32. The Asymod III is equipped with onboard terminal connection solder pads for external -15volts,