1. Pulse trains have been recorded off Puerto Rico and in Massachusetts Bay.2. Usually this permits a pulse or pulse train to be sensed. 3. The AC output load current will therefore look like flat peaks, square pulse train . 4. The pulse trains off Puerto Rico were recorded in March. 5. We have to follow up and see if we see more of these pulse trains . 6. Connecting the antenna directly to the spark gap produced only a heavily damped pulse train . 7. A similar approach uses spectral shaping of optical frequency combs to create multiple pulse trains . 8. Where a pulse train or some other wave-shaping is used, a range of frequencies may be involved. 9. Detections of pulse trains peaked during August and September, with most calls being heard from mid-July to mid-November. 10. Two such " dying pulse trains " were observed, which is consistent with the existence of a black hole.
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