Unfortunately, the where I lived just west of Waikiki, all of the AM sticks were within a couple of miles. The nearest of which was KPOI on 1380, which was basically across the street from my bus stop for school about two and a half blocks away. Also, I was 16 years old, and the only good radio I had was a Hallicrafters S-118 that overloaded on all those signals, and also their harmonics. It was a mess, and I never did hear anything from the mainland while I was in Honolulu. My best catch was DZRH from Manilla one Sunday night on 710 when some of the locals were off.
I didn't have my drivers' license yet, but one Saturday night in February 1965 my frriend and I decided to drive in his brother's car to the other side of Oahu. I talked him into letting me play with the radio, and wound up hearing WBAP, WWL and WLS, That sas probably 25 miles from Honolulu. A couple of months prior to that, I lugged the Hallicrafters with me on a trip to the big island, and got my first mainland catch, which was KEX from Portland. It wasn't a good DX spot, and I didn't hear anything else from the mainland. Although, KPOI and the other Honolulu stations came in like locals.
Fast forward to 1994, I was on Maui, and sitting poolside with a Realistic DX-375 portable one night; All...or almost all....of the big west coast signals were there. The strongest of which were KTNQ and KNX in that order.