Stereo-to-momo summing Y adapter?

Question

Does anyone know of an off-the-shelf Y adapter that's got the summing resistors embedded? My DTV box has stereo out, and my TV has mono in.

I could build one - bike up to Rat Shack and see if they have any RCA connectors, and just slap one together, but that'd be kind of a kloodge.

I don't really want to bike up all the way to RS just to find they don't have a suitable one.

BTW, for what I assume is "line level", does anyone have a favorite resistor value to use here? I was just gonna pick 1K and see if it flies, but I'm open to suggestions.

Or preferably, somebody's already making one. :-)

Thanks, Rich

Phil Allison · Accepted Answer

"Rich Grise"** Go into the sound options menu for your STB and set it to MONO.   Fuckwit.....  Phil

Joe · Answer

Hey Rich, I see that you're having about as much luck getting an answer as I did when I asked a very similar question about my DVD player with its stereo output into my mono-only input TV.

I also got a dumb-ass reply from old Uncle Philthy. My sympathies to ya, and may a colony of fireants make a nest in Philthy's shorts.

--- Joe

George Herold · Answer

rsa,You are trying to sum two audio signals into one input?  What's theinput impedance into your TV?  What impedance does the DTV expect todrive?  (or what's it's output impedance.)  With these numbers asimple resistor summer can be made.Without these numbers you might just play around.  1k ohm sound like agood place to start.George H.

Bob Larter · Answer

3x 1K resistors should work fine.--     W  . | ,. w ,   "Some people are alive only because   \|/  \|/     it is illegal to kill them."    Perna condita delenda est---^----^---------------------------------------------------------------

Bob Larter · Answer

They don't usually have such an option, dickhead.--     W  . | ,. w ,   "Some people are alive only because   \|/  \|/     it is illegal to kill them."    Perna condita delenda est---^----^---------------------------------------------------------------

Bob Larter · Answer

Same answer: 3x 1K resistors.Yeah, that's Philthy for you...--     W  . | ,. w ,   "Some people are alive only because   \|/  \|/     it is illegal to kill them."    Perna condita delenda est---^----^---------------------------------------------------------------

John Doe · Answer

This guy might be the most foulmouthed regular in normal USENET groups.Probably was an unwanted orphan."Phil

Phil Allison · Answer

"John Doe" ** This anonymous, criminal scumbag needs shooting in the head.  Plus his parents and his kids -  if any .........    Phil

Michael A. Terrell · Answer

He survived a late term abortion, and still has the hanger embeddedin his skull.-- You can't have a sense of humor, if you have no sense!

Rich Grise · Answer

Yes.I have no idea - I presume it's "line level" audio, so probably fairlyhigh.I dunno, but I'm assuming it's "line level" - it shouldn't have anytrouble driving a TV audio input.And there is no apostrophe in the possessive its. ;-)Exactly. I wanted to know if someone already makes these, or do I have to build a klooge.Yup, that's pretty much the conclusion I'm reaching.For some reason, the idea of maybe 47K pops up in my head - it'd certainlyreduce the loading on the outputs, but I don't know if the input is highenough impedance to not attenuate the signal itself.Oh, what the hell - all I need is some RS plugs and a jack and I candick around all I want to. :-)Thanks!Rich

GregS · Answer

I would use 5-10 K resistors. In some cases you might want to provide an attenuator but not necessary here. There are some that try to sum for subwoofers. NOT needed. Just pick one channel.

I also got an RC matrix for going from mono to stereo.

greg

Stereo-to-momo summing Y adapter?

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