Scanning to dial today and hear Radio Havana Cuba

[mr_fx]

I suddenly saw a a +20 signal @ 15.230MHz, just a carrier, nothing else, a few seconds later I heard tones. they continued for a few minutes, then the music started, then they started talking... Interesting way to broadcast. The time was just before 6am Central

 

[Mudfoot]

Tuning that big transmitter up takes a little time.

 

[IMD262]

It is a hold over from the days before digital tuners, these signals before the broadcast would let the listener know that there radio was tuned to the correct frequency.Back in the early 90's I received a QSL card from a HF pirate radio station, WLIS (We Love Interval Signals), whose programming was all interval signals from various shortwave stations.

Interval signal - Wikipedia, the free encyclopedia

 

[mackmobile43]

http://media.enet.cu/radiohabanacuba

 

[mr_fx]

lol, yeah, that's it Mack

 

[mackmobile43]

Muy Bein

 

[mr_fx]

also caught radio Alergia a little earlier, took a while to realize what it was