On our trip from Batemans Bay to Canberra, we had to take a little detour in order to get to this cache, since we love such technical gadgets!
After tuning in to the right channel, it started to beep. We counted, and counted, and recounted until we both agreed on the numbers. Then we set off to GZ and got lucky.
Back in the car, we tried a different FM frequency and were surprised by German hits from our childhood.
Thanks for the experience - Fogg & Consortin