Were the LASO low band dispatch channels a frequency pair? If so they used a repeater also The beeps could be heard all over the country,depending on conditions. I used to leave a LASO frequency on at night when I lived in New Mexico and when I heard the beeps I would program the scanner to LAFD and CHP frequencies as I thought them to be more interesting.
Last-minute question, before my expanding "answer," below. I understand what repeaters DO, but not really the technical definition of one. In the mid-70s, which I discuss below, could it have been that the uplink and downlink were patched as needed
at the console by the RTO or PSD (dispatcher) rather than going through a typical mountaintop repeater? Same result - the uplink is rebroadcast on the downlink - but by a different mechanism. A distinction without a meaningful difference for listeners, I suppose. Now:
I seldom listened to LASD, except when I lived in their Lakewood Station area in 1975-77, and by then they definitely used paired channels with the busy-beeps, and with the "patch" being available just as now. That was the the 39 mHz days, of course, and they had several car-to-car channels (C, H, E, W, M... whatever the freqs were) but I don't recall those being paired or repeated.
A 1964 list shows their freqs as
F1 - 39.62 B&M Car-to-car
F2 - 39.58B/39.74M (Firestone #1, Lennox #3, Newhall #6, Hollywood #9, Malibu #10, Montrose #12, Lakewood #13, Lancaster #11) KMD880 & KMA629
F3 - 39.54B/39.70M (East Los Angeles #2, Norwalk #4, Temple City #5, Altadena #7, San Dimas #8) KMA628
[unk freq] - Portable emergency station KMD830 "Station E"
Earlier, a sparsely-detailed 1956 list has
179 mobiles with callsign KA4306, on frequencies 37.26, 39.58, 39.66, 39.74, 39.98, and [CHP's] 42.18, 42.34
Multiple base stations on 39.58 with the ubiquitous KMA628 plus about 8 other callsigns
One base on 453.15, along with 25 mobiles on 458.15, callsign KMG240
And since I've gone that far back anyway, a 1946 APCO nationwide police frequency book shows Los Angeles County (SO) with
KQBV base & mobiles on 31,900 kc [31.90 mHz in today's parlance]
"Monitoring 1682 [CHP], 1714, 1730, 2490, and 33,500 kc" [which were common police voice frequencies in the So Cal area]
What was the question again??