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This circuit is a very sensitive 3-transistor amplifier (27MHz)
Vintage Jade 4 Transistor Walkie Talkie Set | Etsy
Mega Show
Walkie-Talkies: Something for Everyone, April 1974 Popular Electronics - RF Cafe
Set Of 2 Walkie Talkies Loud 'N Clear 4 Transistors Morse Code Kids 5+ NEW | eBay
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Realistic 7 Transistor Walkie Talkie Two Channel Handheld Vintage TRC-4 Set Of 2 | eBay
SET OF 2 Vintage Realistic TRC-4 Transistor Walkie Talkie - Cat. No. 21-122 BOX - $68.00 | PicClick
SET OF 2 Vintage Realistic TRC-4 Transistor Walkie Talkie - Cat. No. 21-122 BOX - $68.00 | PicClick