Radio Retro

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Category Homebrew

Homebrew 1970s FM Tuner Faults and Fixes

FM Tuner above R2525 amplifier

This follow up to my post Homebrew 1970s Hifi Stereo 25w Amplifier and FM Tuner and details the thinking behind its design, construction and restoration of my home-brew FM Tuner. I cover several faults discovered when powered up after it… Continue Reading →

21/11/2024 2

Homebrew 1970s Hifi Stereo 25w Amplifier and FM Tuner

Teak cased gold panelled FM tuner with touch controls for 6 preset stations and manual tuning. A Nixie tube indicates the selected channel and a red led indicates a stereo programme. Below a matching gold panelled hifi amplifier has an upper row of controls for speaker headphone selection along with volume, treble, bass, balance and input functions. Lower row provides power indication, headphone socket, high / low volume level, 2 stage low pass and high pass filters along with a tape monitor. Perspex overlay protects the Letraset Eurostyle lettering used on tuner and amplifier. Both use contrasting silver spun aluminium control knobs.

Reading Simon Reynolds Retromania – Pop culture’s addiction to its own past – nearly stopped me from writing this post. However, well into Retromania Part 1 I realised nostalgia can inspire as well as expire. So I hope others are… Continue Reading →

29/08/2024 0

Homebrew Hitachi Mosfet Power Amplifier

Home brew Hitachi MOSFET Power Amplifier

  This post features a project from 1981, my second to last attempt at design and construction of a low distortion audio power amplifier. It took several months on the bench, tweaking constant current sources  before etching the PCB and… Continue Reading →

01/05/2017 6

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