Thanks for the advice Guys. I have done all of the software upgrades for both the unit and the collars a couple of weeks ago so it can't be that. I have tried the normal antennae on the Astro as well as their roof mount antenna and it makes no difference. My guess is that something has gone wrong ...

G'Day Fella's

I am a hound hunter from Australia, we mainly hunt Sambar deer with Bloodhounds and Beagles. I have read the whole way through this thread. I came to the section on the differing frequencies and thought I had found nirvana!! I have 5 DC 30's and 5 DC20's and have had them for about 12 ...