Walkie Talkie Circuit Question

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Pvlic

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Hi! Im trying to make this walkie talkie circuit, but I am missing one component. Can someone help me how to make this one?!
 

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Usually there is text with the schematic.
"Take a #2 pencil, wrap 9 turns of #22 wire.........."
 
It seems like a RF transformer. Your idea seems not bad. A site from where you picked the circuit says "Start with the primary 9 turns first, directly on this wind the secondary 2 turns."
 
The 'T' on the schematic implies that the transformer has an adjustable core probably ferrite, you might need to salvage something from some dead circuitry and experiment.
 
The circuit seems to be very old and is extremely simple. It might have been a child's toy.
 
dr pepper said:
The 'T' on the schematic implies that the transformer has an adjustable core probably ferrite, you might need to salvage something from some dead circuitry and experiment.
Click to expand...
I think I found one. The diameter is 5mm and 10mm tall. Can I just change the turns of the wire using a #22 AWG wire?
 

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audioguru said:
The circuit seems to be very old and is extremely simple. It might have been a child's toy.
Click to expand...
Hi ! I have a few questions about the circuit.

- Is this circuit still works?
- Can I use an ordinary 8 ohms speaker for this? Which in the circuit acts as the microphone?
 
Pvlic said:
Hi ! I have a few questions about the circuit.

- Is this circuit still works?
- Can I use an ordinary 8 ohms speaker for this? Which in the circuit acts as the microphone?
Click to expand...
- Old design does not mean it's damaged and not work in these days. It should work, don't worry. Some Chinese or other country still make such toy transceiver, under a couple of dollars.
- Yes, it needs an ordinary 8 ohms speaker. The same speaker works as microphone while you press the switch as Transmitting mode.

Since it's 27MHz RF circuit, solder each parts closely and make a couple of neat PCB.

Keep posting here how they work when you make it. I am also interested to such walkietalkies.
 
Last edited:
Pvlic said:
Hi ! I have a few questions about the circuit.

- Is this circuit still works?
- Can I use an ordinary 8 ohms speaker for this? Which in the circuit acts as the microphone?
Click to expand...

Yes, it can still work.
Yes, the "8R" on your schematic refers to the speaker being 8 ohms.
 

Thank you. . I will update you when Im done with it.
 
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