No because that coax only contains the raw satellite signal and the control signals to the dish. Since the HD boxes do not have a coax out, you will have to use either composite (yellow/white/red), S-video (round 4 pin plug + white/red), or component (red/green/blue - white/red). They are in order from worst to best quality, so use the best one the second TV has available. If it is an HDTV, use component. If it's a regular TV, use S-video if the TV has it, or else use composite. If the second TV has NONE of those, you will need to buy an RF modulator (in the DVD hookup section of any discount store). You hook the RF modulator to the composite jacks on the receiver, then hook the coax to the modulator. This broadcasts the audio and video on channel 3 or 4 to the second TV.
Also keep in mind, you don't have to go spend mucho bucks on component cables. Usually (unless you have severe radio interference) you can get away with the lower-midgrade cables that cost about $15 for 12 feet at Walmart. Most people don't need the $100 12 foot Monster cables for their bedroom TV. Monster is more of a 'look at me' status symbol than a worthwhile purchase.