Here is a picture of the amplifier board:
This board seem to have cleaned up pretty well with the following three exceptions.
L108 and L111: Both we're encrusted with corrosion, and at least one of them has a broken wire. They both need to be replaced. Both are described as COIL, RF, 1.8 MH.
Question: Can any RF rated 1.8 micro Henry inductor work in this application, or does it have to be the tech part?
U105: This appears to be a Tek custom IC. All 16 pins appear to be encrusted with green corrosion around where they enter the socket on the board. I am not sure the best way to remove this corrosion without causing problems, although I will see if DeOxIt will dissolve it.
Question: Any better ideas for removing the corrosion around the IC pins/sockets?
I would think these amplifier boards are somewhat more common than the power supply boards because they are above the battery and corrosion is less likely to attack them.
Question: Are these amplifier boards reasonably available?
