I am loving the transformer Idea, but does anyone know where to find the transformer only and or cheaper? I only need it to handle the 10 watts of the radios.
On Thu, 30 Dec 2004 18:06:38 -0800, Neil McKie <[EMAIL PROTECTED]> wrote: > > > Yes, it works really, really well!! > > I used to use two speakers for four separate radios in my 1961 > Dodge Seneca during the mid-sixties. I didn't use the 'big > capacitor' either. > > If one of the radios was not turned on, it worked anyway. > > I simply 'refuse' to tell you it won't work because I do know > better. > > 73, > > Neil - WA6KLA > > Joe Montierth wrote: > > > > Here's what you can do if both radios are > > transformerless and have a single hot side and a > > ground side. This will not work if both speaker leads > > are "hot", this will only work if the speaker amp goes > > through a big capacitor then to the speaker, the other > > side grounded: > > > > Wire the hot side of each speaker output to one side > > of the speaker, no ground needed. Both radios need to > > be "on" for this to work. I did this for years in a > > company truck, so I don't want to hear from you > > nay-sayers that it won't work. If you don't want to > > monitor one of the radios, it needs to be "on" anyway, > > and the volume turned down. > > > > Radio A>---------<speaker>-------<Radio B > > > > I could explain how this works, but first I want > > everyone to tell me that it won't work, will destroy > > the radio, will sould bad, etc., because thats what > > happens anytime I share this with someone. :) > > > > Joe > > > > --- DCFluX <[EMAIL PROTECTED]> wrote: > > > > > > > > Thats what I wanted to do, but this has to be a > > > discrete solution. > > > The radios have BTL output. > > > > > > > > > On Thu, 30 Dec 2004 19:03:04 -0000, Coy Hilton > > > <[EMAIL PROTECTED]> wrote: > > > > > > > > > > > > Yep, Use a Opamp mixer followed by a audio PA > > > chip. You can build > > > > the mixer real cheap and depending on how much > > > audio power that you > > > > need that can be had cheap too. Some audio PA > > > chips now drive the > > > > speaker BTL ( neither side grounded... the speaker > > > is driven > > > > differentially ) You'r lucky that you didn't smoke > > > one or both Audio > > > > PAs in the radios. Not only were you driving the > > > attached speaker > > > > but, you were back driving the other radios audio > > > output section. > > > > Oh, you'll also need to load both radio outputs > > > with a resister of 8 > > > > or ten ohms. > > > > 73 > > > > AC0Y > > > > > > > > --- In [email protected], DCFluX > > > <[EMAIL PROTECTED]> wrote: > > > > > Anyone had experience with mixing the speaker > > > output of 2 radios, > > > > Say > > > > > Motorola GM300's to one speaker? > > > > > > > > > > I originally tried a couple of resistors but I > > > may have the wrong > > > > > values as they got hot as hell and one started > > > smoking, I was > > > > using 2 > > > > > .82 ohm at 2 watt resistors for each radio, one > > > resistor in each > > > > > speaker lead and at the center the speaker. My > > > next best guess is > > > > > using a multiple winding transformer with three > > > windings of 4 ohms, > > > > > but finding information on how to wind a > > > transformer to do that is > > > > > impossible these days. Any Ideas? > > > > > > > > > > > > __________________________________ > > Do you Yahoo!? > > Yahoo! Mail - You care about security. So do we. > > http://promotions.yahoo.com/new_mail > > > > > > Yahoo! Groups Links > > > > > > > > > > Yahoo! Groups Links > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
