These collars work on the MURS frequency so 153mhz is roughly the middle of the band. A quarter wavelength for this frequency is roughly 18.5" which is what their standard antenna measures. A quarter wave antenna is a common length antenna for all frequencies. The long range antennas are 22.5" which ...

I have a dc 40 that I bought used over a year ago from a fellow I didn't know. Ever since I have had the collar it loses gps signal about every other time I use it. I have no way of know exactly how old it is so I'm not sure if it's one of the earlier collars that had this problem from the factory ...

When a collar gets refurbished does that include a new battery? Also my collars all have tuff skin antennas and new reflective collars. If I sent one in to swap out for a refurb would those items be switch or would I lose them?

Thanks
Randall

Try this

http://youtu.be/HH7nsgXHQ_w

I have a dc 40 that I've had for a couple years. Last two weeks when I try to charge it instead of the blue light going solid after its charged it goes out and the collar isn't charging. I've cleaned the contacts, tried different chargers, and reinstalled current software. Anyone had this problem or ...