Need a GPSDO to compliment your new IC-9700 and keep it on frequency? The BG7TBL is a popular GPS disciplined oscillator available on eBay. Many amateurs use this as their 10 MHz reference for frequency locking radios. They come in two versions, one that is sine wave, the other a square wave. A handy GPSDO kit for the shack! I also review and show the operation of the matching BG7TBL GPS 10 MHz Amplified Distribution system