Anybody Know How A Talkback Speaker Works?

[Wire Weasel]

I've never had one but I was just thinking that is should be easy to make any external speaker into a talkback speaker rather than going inside the radio to add talkback...which isn't that hard but I'd like to convert external speakers too.

Anyone know what components are added to a speaker? Is it adding like a 500 ohm pot across the leads?

If no one here knows I might play around with one of mine and will post back what I come up with.

 

[74IN]

For Cobra/Uniden, put a 100 ohm resistor across the PA/ext. spkr grounds.

Galaxy might be the same.

 

[Wire Weasel]

Hey 74,

Yes I'm aware but looking to make talkback for EXTERNAL speakers.

For inside radio you can use a 100 ohm but may have to play with the value up or down to get the level you desire.

Just as easy inside radio to make the talkback a variable. Connect wires to the middle tab and 1 side tab of a 500 ohm panel mount pot. Connect 1 wire to External Speaker ground and other wire to Chassis Ground like a nearby screw holding the circuit board down to the chassis. This will give you variable talkback which adjusts from full-loud all the way down to OFF.

Drill hole in rear of radio and install the panel mount pot - add a knob. Off ya go mate!

 

[Wire Weasel]

Here's an example of what I'm referring to

ARIES TALKBACK SPEAKER - eBay (item 380177817377 end time Jan-08-11 07:22:20 PST)

 

[74IN]

All you need to do is solder the resistor onto the ground of two male plugs and insert the one wired to the speaker into the ext spkr jack and the other into PA.

I have one like this with a female jack as well so it can be used with any speaker.

 

[BOOTY MONSTER]

How to add talkback to a CB Radio

 

[mackmobile43]

Here's an example of what I'm referring to

ARIES TALKBACK SPEAKER - eBay (item 380177817377 end time Jan-08-11 07:22:20 PST)

Those do not work on export radios so don't waste your money if that's your plan.

 

[GLR]

Welcome back to the forum.

 

[mackmobile43]

Welcome back to the forum.

Lets try to stay on topic.

 

[GLR]

Lets try to stay on topic.

My apologies. I thought the question had already been answered.

 

[mackmobile43]

My apologies. I thought the question had already been answered.

No need for an apology but

has not shared which radio he plans to use this on.

 

[74IN]

I dunno about variable, but the internal TB is the same as an external. Only difference is that the resistor is connected to 1/8" jacks. With a stock mic, use a 100 ohm, a NC like a Turner, 68 ohm.