[Premium-Rx] Racal 1778

[davesc50 at tiscali.co.uk]

Hi All,

In case the fault I had with my receiver is a common one. The correct 
IC designator is  ML5. PIN 4 is +12V, this was short to ground and 
causing the PSU to shut down due to over current limiting.

The LM324 was a wierd purple ceramic package with a gold top. I 
presume some form of mill spec device. I replaced it with a common 
plastic encapsulated device without any problems. All the other OP amps 
on the PCB were normal plastic package devices so I presume there was a 
reason for the designer specifying the purple ceramic one originally 
but can not see why.

Sorry for any confusion caused earlier by suggesting it was IC10 but I 
was at work, didn't have access to my info, and my memory isn't what it 
used to be.




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