: Two 2-way radios on one speaker?


vanguard
02-10-2006, 06:58 AM
I just got my ham license and I have a radio one the way. I threw in a cheap speaker (http://www.universal-radio.com/catalog/speakers/3041.html) while I was at it thinking that even a cheap speaker would be a big improvement over an internal speaker located under my seat.

My question is, "Is there a way to hook up both the CB and 2 meter radio to that speaker?"

zosimov21
02-10-2006, 07:52 AM
Showstop would be a good one to ask regarding this.

guttapercha
02-10-2006, 08:34 AM
I just got my ham license and I have a radio one the way. I threw in a cheap speaker (http://www.universal-radio.com/catalog/speakers/3041.html) while I was at it thinking that even a cheap speaker would be a big improvement over an internal speaker located under my seat.

My question is, "Is there a way to hook up both the CB and 2 meter radio to that speaker?"

Here's one way of dealing with it:

http://www.aaroncake.net/circuits/mixer1.htm

wrooster
02-10-2006, 09:30 AM
also read
http://www.all-electric.com/schematic/simp_mix.htm

jim aka the wrooster

fourwd1
02-13-2006, 07:06 AM
Just use a switch. If you try listening to 2 audio sources thru one spkr at the same time it will be unintelligible.
Better yet get a 2nd spkr.

vanguard
02-13-2006, 01:09 PM
It's mostly a space issue in the cab. I figured two feeds into one speaker would sound a lot like two speakers going at the same time but I'm not sure.

Dick Foster
02-13-2006, 02:18 PM
You could try some big caps but you have to be careful with CBs as many of them switch the speaker with the PTT switch and use the final audio amp to modulate the TX. Get the unpolarized kind that are used in audio crossovers. Radio Shack has them. CBs are all so cheap that they will do anyting to save a nickel. I'd start by looking at both speaker outputs with a volt meter and see if you see any DC bias voltages. They don't always use a common ground return in the audio final so check to see if one side of the speaker goes to ground.

1DERWHEELS
02-24-2006, 10:39 PM
either use the FET setup or a "on-off-on" style switch to listen to one at a time, the only other option is 2 speakers, think if one speaker fails it could cause damage to both radios or at the very least you wouldn't hear either one.