The resistor in series from the regular is suprisingly ok, even though it got hot enough to melt the solder
holding it on the board.
Before I re-soldered it a resistance measurement toward the active device showed 'Zero' Ohms which
went to infinity when the device was removed.
Replacing the device with a PGA103 gave me around the correct voltages and current draw.
The second device appears to have feed volts but at this point I was really struggling to focus so gave
up. Put the pre-amp back in line and is still dead i.e. no noticable increase in noise level to the receiver
which normally would be about 2 'S' points when beaming across the village.
Might take you up on repairs but first got a voluntary trip out to the islands (weather permitting).