George wrote: > Can anyone tell me what ADF receiver the C-2275/ARN control box > was used with? It goes with receiver R-836/ARN, part of AN/ARN-59 ADF. That is the JAN nomenclature for commercial receiver R-30A, part of Aircraft Radio Corporation Type 21A ADF. It's late-1950s to mid-1960s era gear. Mike / KK5F