This is a manual for the Harvey Radio Labs 100-XE transmitter from September 1940. Seems it is from the very beginning when Mr. Lyman just had bought the company. Mr. Harvey was since March involved in Harvey-Wells. It is either a prototype or a suggested transmitter for the US Engineer Corps back just before the War started. The model was totally unknown to me, enjoy looking at the manual. Schematics available upon request, its huge in size and cannot be easily scanned :) Many thanks to Tom French W1IMQ for finding it and selling it to me!

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