In the 1960s, WMCA's great competition was with rival WABC. Radio historians have tended to treat WMCA as a radio stepchild, the proverbial David going up against the Goliath that was corporate-owned, stronger-signaled WABC.
For four consecutive years (1963 through 1966) WMCA had the highest ratings share of all radio stations in New York City, according to Arbitron, in spite of its directional, 5,000-watt signal which could not cover the same geographic region as non-directional, 50,000-watt WABC. However, WMCA's directional signal is aimed toward Manhattan from just over the river in New Jersey, and its low frequency (570 kHz) results in strong Midtown Manhattan coverage. At the time, Arbitron was the newer and lesser quoted ratings source compared to the more established Pulse and Hooper Ratings. During this time frame, Pulse and Hooper usually placed adult full-service WOR as the overall number-one station, with WMCA generally but not always leading WABC and WINS as the Top 40 leader. WMCA's ratings strength was concentrated within New York City itself. However, WABC proved more popular in suburban areas where WMCA's signal didn't come in as well on standard 1960s-era AM radio receivers. The areas where WMCA did not have a strong signal were southwest, west, and northwest of its transmitter. By 1967 and 1968, WMCA ratings had started to decline significantly but still demonstrated a strong showing in the five boroughs (although not the suburbs), and as late as February 1969, Pulse ratings surveys indicated that WMCA beat WABC in New York City itself, although not in the full market. From 1967 forward, WABC had become the leading top 40 station in the total market.
PICTURE: By https://am570themission.com/, Fair use, https://en.wikipedia.org/w/index.php?curid=60352666