[Milsurplus] U.S. Navy ECM gear in WWII?

[Hubert Miller]

I don't see how the weapon could be countermeasured anyway. Neither the front lines at the Battle of the Bulge or the Okinawa suiciders were situations
where any kind of high power VHF transmitter could be employed. Of course, the U.S. still had to consider the possibility. 
I am wondering right now if in the production of the fuzes, there was any step that involved checking or setting the operating frequency, or if standard
parts were just used and call it good, knowing the superregenerative circuit did not have to adhere closely to any rigid frequency limits anyway. 
-Hue 

>Subject: [Milsurplus] U.S. Navy ECM gear in WWII?

>I was reading about the radio proximity fuze that the U.S. developed in WWII & was used to great effect in the Battle of Okinawa as well as in Europe. As the fuze was an oscillator coupled to an antenna it radiated a low power CW electromagnetic field in the 180-220 MHz range. What caught my attention was U.S. concerns that these signals could be intercepted by the enemy & this information used to develop countermeasures against the shells. As a countermeasure, this source stated that the Navy transmitted spoof signals to confuse any enemy radio intercept activity. Despite the fact that these fuzes were declassified in 1970, I am not familiar with the equipment that might have been used to generate these spoof signals. Any one have any insights to this?
Jack