I did have to modify it with an external RF probe and to correct the bias on at least one of the germanium transistors. I was using a signal tracer I bought from Tandy when they first opened stores DownUnder many years ago. I soon discovered the audio system was fine but nothing was getting to the speaker or the external speaker socket. My first plan of attack was make some sense of the circuit diagrams and then trace the audio path from the detector to the speaker. I soon worked out it was working, the S meter was waggling round and when I pressed the PTT it was transmitting. The original owner brought it to me to fix and it seemed to be "dead". It is quite old now (2004 I think) but it has very advanced noise reduction and signal processing. About the first of February 2016 the display on my fancy Icom IC-756 Pro11 suddenly went blank.
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