When I've tried to hook up a recorder directly from the Dish receiver's 2nd tuner output in another room, I got a black screen.
The signal is modulated, and the TV has to be on a certain channel in order to tune it in (you can go into the Dish menu to see what channel it is - it can also be changed).
I tried to tune the recorder to that channel, but I still got a black screen. Now, normally, with the 1st tuner's output, you'd have to first go into the Dish menu to turn on the "enable output to external tuner" setting (which is how I'm able to record from it over s-video to my Panasonic EH75V recorder). When I went into the 2nd tuner's menu (at the second TV that it was being sent to), that area was blanked out in the menu. So I don't know for sure if it was the recorder not being able to modulate the signal, or the fact that I couldn't "enable" the output, like you have to do with tuner #1.
Either way, I couldn't get it to work. All I can say I know for sure is that if the recorder has no tuner at all, there's no way it can work, unless you've got some kind of modulator in-between (and the Dish tuner's 2nd output can't be set on a channel lower than somewhere around 22, I think - so no easy out to a common, cheapo modulator on channel 3/4).
You can try your own recorder with a tuner (as it could've just been the recorder for some other reason than the signal not being modulated), but buy it from somewhere where it's easy to return it, like Sam's Club, or somewhere like that.
The only way I can think of that you'd be able to use a tunerless recorder is if your TV had A/V out, and you hooked it up to that.
(And guys - for future reference, whenever you hear a poster say he "has Dish in his room" without a tuner", you can almost assuredly expect it's the modulated 2nd tuner output from one of their "dual-tuners", like I described above. I have their dual, SD tuner, the 322, and also, their DVR's and non-DVR, HD, 222 dual-tuner, have that ability, too).
I suppose there could be some kind of possibility that they don't make recording from the second tuner possible, to thwart people that use the 2nd tuner's output in the main room to record from - meaning having two-tuner capabilities and not having to rent their DVR to get that - bit then, why would it still be able to output a picture to the TV at all? Can they do that with the software? That's why I thought maybe the recorder just couldn't modulate it (but the TV can). Can a DVD recorder normally do that? I'm not sure, because I've never used mine that way. If not, can you buy an affordable modulator that would work?