Rare Monty FM Receiver Board for ₹100! : Sony CXA1019S IC Vintage FM Kit Unboxing! | RoyTechJourney

Vintage Analog FM Receiver Circuit: Sony CXA1019S IC – The Ultimate Budget Gem from the 90s!
Discover the magic of retro electronics with this ultra-rare analog FM receiver circuit board featuring the legendary Sony CXA1019S IC! Back in the 90s, this one-chip FM/AM radio IC was an absolute favorite among DIY hobbyists, radio enthusiasts, and cassette tape recorder builders – powering countless homemade FM radios with its simple, high-quality performance. Designed by Sony Corporation as a bipolar silicon monolithic IC for radio-cassette players and headphone stereos, the CXA1019S packs everything you need into a single chip: RF amplifier, mixer, local oscillator, IF amplifier, quadrature detector for FM demodulation, tuning LED driver, electronic volume control, and even a built-in detector for crystal-clear audio output.c9714cd43898 It operates on a low 3-7V DC supply, draws just 5.3mA (typical at 3V for FM mode), and delivers a punchy 500mW output into an 8Ω speaker – making it perfect for portable projects without draining batteries.99ab0e
What makes this the most affordable analog FM circuit even today? Priced at just 100 INR (that's under $1.20 USD!), I snagged this elusive board from a hidden gem in the local electronics bazaar – a steal considering how scarce these have become. Once a staple in Indian and global DIY scenes, Sony discontinued production years ago, turning CXA1019S-based kits into collector's items. You won't find them on mainstream sites like Amazon or Flipkart anymore; they're relics of the pre-digital era, hunted by vintage audio fans and ham radio tinkerers. In this RoyTechJourney episode, I unbox, inspect, and test this rare find to see if it still tunes like a dream after decades in storage. Spoiler: It does – capturing FM signals with that warm, analog warmth no modern chip can replicate!
Key Features of the Sony CXA1019S FM Receiver Circuit:
All-in-One Design: Minimal external components needed – just a few capacitors, inductors, a variable tuning capacitor, and an antenna coil for a complete FM receiver setup.404d0f
FM/AM Dual Band: Focuses on FM (88-108 MHz) but supports AM too; ideal for simple radio builds.
Low Power & High Output: Runs efficiently on batteries; drives headphones or small speakers directly.
Tuning Simplicity: Built-in LED driver for signal strength indication – no fancy digital displays required.
Why It's Rare: Discontinued by Sony in the early 2000s, these boards now pop up only in old stock or second-hand markets, often fetching 500-1000 INR if you're lucky.
If you're into restoring vintage gadgets, building budget radios, or just chasing that nostalgic analog sound, this CXA1019S circuit is a must-have blueprint. Watch as I break it down step-by-step – from unboxing the board to firing it up with a quick power test. Got a similar retro find? Share in the comments!

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Parts List (For Replication):
Sony CXA1019S IC (core chip)
10.7 MHz FM IF Transformer/Coil
Variable Capacitor (10-100pF for tuning)
Electrolytic Capacitors: 4.7µF, 0.02µF, etc.
Resistors: As per datasheet (e.g., 10kΩ for volume)
Antenna Wire
Resources: Full datasheet available here. Connect: Instagram

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