The one with the box from the image is the component I dont have.Which component you are talking about?
How about the 2 turn wire? Can you check the image if im doing it right?Usually there is text with the schematic.
"Take a #2 pencil, wrap 9 turns of #22 wire.........."
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?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.
- 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.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?
Thank you. . I will update you when Im done with it.- 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.
Can I use this?About audio transformer:
Better to scrap from old AM radio receivers etc. It's small iron core transformer: http://scitoys.com/scitoys/scitoys/radio/hand_xformer.jpg