Laurence,
The swinging of your S-meter was the result of the Waltham and Squantum transmitters beating against each other. They were proabably
diiferent in frequency by a few Hertz. I get the same thing here in Philly when WNYH on Long Island and CFZM Toronto start pounding WVCH during afternoon Critical Hours; you can hear the whooshing easily on a car radio.
The swinging of your S-meter was the result of the Waltham and Squantum transmitters beating against each other. They were proabably
diiferent in frequency by a few Hertz. I get the same thing here in Philly when WNYH on Long Island and CFZM Toronto start pounding WVCH during afternoon Critical Hours; you can hear the whooshing easily on a car radio.