For me in Brisbane, Rebel on 99.4 is at similar strength to stations on 99.3 and 99.5. Same with 100.6 with stations on the odd frequencies on either side.
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Nuvver Stereo 10 aircheck, courtesy of The Radio Vault:
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More from the TRV archives, this time 4BH:
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Another one from TRV:
This might bring back some memories for @Brianc68, even though most of his radio listening was on FM104 back then. 
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Jeffreys and Robertson were very funny together.
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It still brings back memories! I was at uni around that time and living with an aunt whose station was 4BK! It was a constant battle with the home stereo - switching between 104 and 4BK
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Thanks for that. Got a good laugh
I fondly remember the on air banter between those two.
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Did 4BK have an oldies format in the late 80s (before the FM conversion)? Kinda sounds like a real difference to the B105 that they became
As always, very thankful for your sharing this, love hearing some of these stations sounding so great in their glory days
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It was a modern music format from what I recall⌠I donât think their playlist changed much in going from 4BK to B105FM,
As I remember in early 1989 travelling in my parents Magna from Tea Gardens back to Newcastle at night, the car radio was on 1233 ABC Newcastle. My sister wanted 2NX, as we were in the back seat, she asked my Mum press the SEEK button (she was obviously thinking it would stop at 1341). But unbeknownst to her (though I could see the radio display from where I was), it stopped on 1296. They played a modern sounding song (canât remember which one), then 2 minutes later, a booming â1296 4BKâ sweeper was heard, and my sister asked for the SEEK button to be pressed again (and it stopped on 1341 this time).
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No the format changed quite dramatically from 4BK to B105. In the 12 months before it converted anyway. Earlier in the 80s it was âsoft rockâ. By the mid 80s it was âthe best variety of better musicâ with middle of the road hits and memories. The newer songs they played were only the popular softer pop/rock. Lots of Billy Joel and Fleetwood Mac. But essentially it was a hits and memories station quite similar to 2UW in the mid 80s. You might have caught it in the months leading up to the conversion when they did start to go a bit more modern.
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Thanks for sharing. Loved hearing snippets of some of the songs on 4BK. Nothing takes me back to 1986/87 like In The Shape of a Heart / Jackson Browne
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When 4BK broadcast for the last time their tag was Rock and Roll with The innovator not the Imitator.
A couple of TV commercials
4BK 1988 Class Hits All Day
and
BK - 1300 Playing one great soft rock song after another in 1983
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Thanks for confirming that, I thought someone had mentioned here before that the FM conversion saw quite a shift in format - not an uncommon thing for many AM stations making the switch around the time
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Like 5DN which went from top rating talkback on AM to a dud music format on FM. At a time when an FM licence was a ticket to ratings gold, it did not play out that way for 5DN 
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Interesting that the commercial stations all had the â223â prefix (later 3223) phone number. How did they manage that?
MMM - 223 0123
4BK - 223 0130
B105 - 223 0055
4KQ - 223 0693
4BH - 223 0882
What did Stereo 10 have? 223 1010?
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223 1010 rings a bell so it might have been. It also could have been 223 1008 but that doesnât ring a bell.
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Were they all are located in roughly the same area of Brisbane?
When KOFM and NXFM were colocated at Charlestown in Newcastle, their phone numbers both started with 4942 xxxx.
I know there are a number of colocated or nearby stations where the first few digits are NOT the same however.
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When I was in Telstra I asked this question and the main reason was call volumes.
The main switch was much more able to handle this, the numbers lived in Edison exchange for sometime before being moved to Charlotte street exchange.
Can you imagine a crossbar mechanical exchange trying to coop with that amount of calls!
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Awesome, that explains everything. Back when the first 3 or 4 digits pinpointed what exchange it was connected to.
Thanks @radioengineer
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