- stereo to mono - 10 Updates
- Searching for a good LCD display for a FLUKE 8010A DMM - 1 Update
- Your favorite battery supplier or seller? - 1 Update
| Tim R <timothy42b@aol.com>: Feb 03 08:56AM -0800 > The simplest way to do this is to use an RCA Y adapter and connect the single input to both the left and right channels. This is a common practice and will not harm the unit. Any attempt to combine the separate outputs could result in damage to the amp. It was not designed to have that occur. > Pick up a y-cable. Should be less than $5.00 > Dan That's backwards. I don't have a single input, I have two channels output from an amplifier, an amplifier that has no mono switch and will output only stereo, and also it's an amplifier not otherwise in use anywhere else. I want to put it into a single speaker, because I happen to have a Pioneer tower speaker about 4 foot high for which I have no other use. I don't have a pair of them, I bought something at a yard sale as it was closing for $5, and the guy wouldn't sell it unless I took the speaker too. The amplifier has output speaker terminals to which I can connect wires. For two channels, four wires. The speaker has terminals to which I can connect wires. One speaker, two wires. I had hoped there was some kind of simple resistive network I could put together that would take four wires in and have two wires out. I found that circuit in the wye article but it really looked like signal level, as someone here confirmed. There may be no good way to do this and that's okay, it's not like I'm out any money. Anybody want half of a Pioneer speaker pair? |
| dansabrservices@yahoo.com: Feb 03 09:11AM -0800 > That's backwards. I don't have a single input, I have two channels output from an amplifier, an amplifier that has no mono switch and will output only stereo, and also it's an amplifier not otherwise in use anywhere else. Sorry, I read that backwards. As it stands, without an external circuit to allow for the use of both channels in "bridge" mode, what you seek is not possible. The amp sections were not designed ot be used in bridge mode (which is what you are asking). Dan |
| Pat <pat@nospam.us>: Feb 03 12:22PM -0500 On Tue, 3 Feb 2015 08:56:41 -0800 (PST), Tim R <timothy42b@aol.com> wrote: >I found that circuit in the wye article but it really looked like signal level, as someone here confirmed. >There may be no good way to do this and that's okay, it's not like I'm out any money. >Anybody want half of a Pioneer speaker pair? As others have pointed out, trying to bridge the amplifier at its output is risky. Fortuneately, you don't need to do that. Just use one channel of the amplifier driving your single speaker. If you do that, the only problem you have left is making sure that single channel (mono) contains both the left and right from the TV. You can easily bridge the low level signals that go into the amp. Now, what does the output from the TV look like? If it is RCA connectors (typically red and white), you can just use a "Y" cable as others have suggested and your are done. If, however, you are trying to tap into the speaker wires coming from the TV, you will want something like some of those circuits you mentioned in your first post. You need to combine the two outputs without shorting the TV amplifier's two outputs together. |
| whit3rd <whit3rd@gmail.com>: Feb 03 11:26AM -0800 On Monday, February 2, 2015 at 2:01:11 PM UTC-8, Rheilly Phoull wrote: > Very likely that if you feed the speaker from both + outputs (ie. do not > connect the - terminals just each + terminal) you will have the effect > you want. It's also very likely that (when/if a monaural source is connected) this will produce zero output sound. |
| Tim R <timothy42b@aol.com>: Feb 03 11:50AM -0800 On Tuesday, February 3, 2015 at 12:22:12 PM UTC-5, Pat wrote: > does the output from the TV look like? If it is RCA connectors > (typically red and white), you can just use a "Y" cable as others have > suggested and your are done. Ah, you are suggesting bridging the signal level inputs instead of the outputs. That makes sense to me, but............isn't that what those circuits I linked do? Are you sure a Y-cable will work? |
| dansabrservices@yahoo.com: Feb 03 12:12PM -0800 > That makes sense to me, but............isn't that what those circuits I linked do? Are you sure a Y-cable will work? Do it all the time. Works great. Dan |
| Pat <pat@nospam.us>: Feb 04 06:14AM -0500 On Tue, 3 Feb 2015 11:50:29 -0800 (PST), Tim R <timothy42b@aol.com> wrote: >> suggested and your are done. >Ah, you are suggesting bridging the signal level inputs instead of the outputs. >That makes sense to me, but............isn't that what those circuits I linked do? Are you sure a Y-cable will work? Yes. But, what outputs from the TV are you using to drive those signal level inputs? If they are regular line level outputs, just bridge them. Line level outputs are very forgiving. If, however, you are using external speaker outputs, you will need one of "those circuits" to avoid problems with the amplifier inside the TV. |
| Tim R <timothy42b@aol.com>: Feb 04 05:06AM -0800 On Wednesday, February 4, 2015 at 6:14:18 AM UTC-5, Pat wrote: > bridge them. Line level outputs are very forgiving. If, however, you > are using external speaker outputs, you will need one of "those > circuits" to avoid problems with the amplifier inside the TV. Okay, I'm way above my head with this stuff. (Long ago I knew a little more, I had an Extra class amateur radio license.) But this isn't making sense to me. When we were talking about the amplifier, the consensus was that the bridging circuits shown on the "why not wye" page were only for line level inputs and should not be used on the speaker outputs. Now that we're talking about the tv, you're saying that the line level outputs don't need bridging but the speaker outputs do. I'm far more wary about damaging the tv than I am this amp, which cost me only $5 and isn't used often. The tv still works though it is an older tube type, like the 3 spares in the garage I can't get rid of. |
| dansabrservices@yahoo.com: Feb 04 05:36AM -0800 If the TV has audio output connectors, you are all set using a Y adapter to "connect" both left and right into one channel on the amp. If all you have on the TV is speaker outputs, than you cannot use a Y adapter. The problem will be the same as attempting to connect the amp's speakers together... don't do it. Dan |
| Pat <pat@nospam.us>: Feb 04 09:52AM -0500 On Wed, 4 Feb 2015 05:06:40 -0800 (PST), Tim R <timothy42b@aol.com> wrote: >When we were talking about the amplifier, the consensus was that the bridging circuits shown on the "why not wye" page were only for line level inputs and should not be used on the speaker outputs. >Now that we're talking about the tv, you're saying that the line level outputs don't need bridging but the speaker outputs do. >I'm far more wary about damaging the tv than I am this amp, which cost me only $5 and isn't used often. The tv still works though it is an older tube type, like the 3 spares in the garage I can't get rid of. One of the reasons this is confusing is that line level (or signal level as you called it) is about 1.5 volts max. The voltage going to small speakers is often a similar voltage. The difference is that line level drives high impedance inputs so the current is very low and not much power is transferred. However, with speakers, they often have a much lower impedance (eg, 8 ohms) and therefore draw more current and therefore more power. Outputs designed to drive speakers can therefore be more easily damaged if shorted to ground or each other. Since the voltages in question are similar, both can be used to drive the input of your amplifier. We can't be sure how to answer your question without knowing about the output of the TV. One very simple circuit you can use if the TV only has speaker outputs is to simply place some resistors in series with the signal. Almost any value 1K, 10K, even 100K will do. The result is complete protection for the amp in the TV because it is designed to drive speakers (8 ohm or 4 ohm or similarly low values) and now you have thousands of ohms in series with it. The signal after the resister can no longer drive speakers but it can still drive the high impedence inputs of your external amp. Once again, though, if your TV has line level audio out (usually white and red RCA connectors), you can just bridge them together and not worry about any of this. Good Luck, Pat |
| Bo-Lennart <bo-lennart.karlsson@telia.com>: Feb 03 11:39AM -0800 is there someone out there who has a LCD display for a FLUKE DMM model:8010A or 8012A. Both instrument has the same kind of display. FLUKE # is: 698381. Maybe You have a broken 8010A or 8012A, but with a good display. If so, I can buy Your good display. Best regards from SWEDEN Bo-Lennart Karlsson |
| John Doe <always.look@message.header>: Feb 03 04:53PM > example below. All twenty-one reviews are 5-stars and probably > all by the company itself, on Amazon. > http://www.amazon.com/ON-Presenter-Pointer-Powerpoint-Presentation/product-reviews/B00NOR9YPS/ref=cm_cr_pr_top_recent?ie=UTF8&showViewpoints=0&sortBy=bySubmissionDateDescending Looks like they removed the product. Now they just need to look at the other products from that company, like this one... http://www.amazon.com/ON-WAY%C2%AE18650-3800mah-Rechargeable-Battery/product-reviews/B00ODMBJ5G/ref=cm_cr_dp_see_all_summary?ie=UTF8&showViewpoints=1&sortBy=byRankDescending |
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