LAB2104

   Phase compensation is a method for correcting the time problems on spectrum in magnetic audio recording. These compensation networks are provided for the record amplifier circuitry, also for playback amplifier. These networks enable the circuit to be optimally compensated for group delay introduced by the record equalization circuitry with separate adjustments for both operating speeds. The result […]

  What’s New: 10 Jan 2019: adding Sony TC-K777 (MK1 – Sendust head), Nakamichi 680ZX, Alpine AL85 09 Dec 2017: adding Technics RS-B905, Aiwa Excelia XK-009, Pioneer CT-93, Pioneer CT-S830S charts; 01 Oct 2017: adding YAMAHA K-1020 chart; 28 Aug 2017: adding TEAC V-7000 chart; 27 Aug 2017:  adding a Nakamichi ZX7 chart;    The frequency response of […]

Important!: The laboratory discontinue the partial repairs of cassette and reel tape decks from the JAN 2021. From JAN 2023 we support only full restoration process! We cannot process international request outside EU and cannot process machines more than 30 kg weight (the international sending of heavy parcels and machines from Bulgaria is limited!). For […]

    The LAB2104 is situated at Technical University in Plovdiv – Bulgaria. Bulgaria is a small country in the European Union and Plovdiv will be the European Capital of the Culture in 2019. The laboratory specialize analog magnetic recording in parallel with the research on the embedded systems and electronics. About the magnetic recording It […]

   The LAB2104 team restore some good analogue cassette and R2R tape decks. Maybe you know that the pure analog content sounds different than the synthetic digital content.  So, you can find some good photos of the construction of the Hitachi D-5500 model on Facebook page of the lab. It is really good machine. The construction is unique. […]