Satellite Tv/ Diplexer????????? (1 Viewer)

[Curtis]

I plan on updating my Sat-Dish to a triple LNB which will include the Sat-C LNB and I also want to put an Over The Air Antenna in the attic so I can pick up the local HD channels.
I know that i will need to purchase two of the Diplexers. But which one as they range in price from 5-20 bucks or does it matter as they will do the same job no matter the price ?
Thanks

 

[Grant B]

I bought the kit for $8 from Directv and didn't have to buy anything else

most Directv recievers have an ant/cable input, you can run the coax directly into it

 

[JerryCulp]

I used the diplexor from the company that makes the multiswitch, in my case, Terk.
An antenna dealer told me that mixing brands usually works...