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That info covers the older version, the one made before they began to use the newer "firestarter" amplifier, the one with the four IRF520 MOSFETs.
That model has been in production long enough to see a whole list of production changes on the inside. The info in the link above is only a snapshot of that whole time span.
Hopefully your radio is from the same era. Does your radio have the big, heavy power transformer with two metal metal-body regulator transistors on the outside of the rear heat sink?
Or does it have the chinese "brick" switchmode power supply with the built-in fan on the inside?
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