What kind of dish to get?

The "one knob" AU9 dish is called a "Slimline-3" (SL-3) capable of receiving the 99,101, and 103 satellite positions. The "three knob" one on your house is a "Slimline-5" (SL-5) for receiving the 99. 101, 103, 110, 119 positions. The SL-3 will work just fine with an HR23-700 for all your HD channels, national and local.

The only thing you could miss is if you have SD versions of your locals on 119 of which some do not have HD versions, you will not be able to receive them on the SL-3.

A rarity, but can happen in some situations.

Note: Remember to rerun the setup on the HR23 to select the SL-3 dish option so the 119 guide data will be correctly filtered out.

 

For future reference, what you're calling a "knob" is known as a "feed horn".

Be careful about putting a DVR in the shop if the shop isn't climate controlled. Extreme ambient temperatures or wide temperature swings can significantly shorten (or even end) the life of a DVR.

 

Sometimes, not always, occasionally, once in a blue moon, more often than not, maybe once in ten times, you might have to run set up a few times, the boxes seem to be a little twitchy about connecting to an SL3 after they've been connected to an SL5 for a while.

 

Yes, and what's confusing to many is that the dish with the "single knob" is actually housing three feed horns, which if you look carefully is why its oval shaped. A larger feed horn in the center for the 101 Ku-Band, and two smaller horns, one to either side, for the 99 and 103 Ka-Band. All under the same oval shaped protective weather cap.

 

I think this would apply when going from SWM to non-SWM. not from "regular" 3 to regular 5 LNBs