[Milsurplus] Noise question, not too far off topic.

[Bruce]

Hello,

That is the Timewave ANC-4 Antenna Noise Canceler.

http://www.timewave.com/support/ANC-4/anc4.html

73, Bruce WA8TNC
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radioman390 at cs.com wrote:
>   There was a unit made at one time which would receive the noise separately from your receiver (even with a separate antenna as I recall, put it out of phase, and mix it with the signal from your main antenna, so as to cancel out the noise before it went into your receiver,? but not the main signal, only the noise. I think it could only handle one noise source.