Boss DM-2 Delay

Ini adalah efek pedal clone dari BOSS DM-2 Delay. Analog delay ini mampu menghasilkan waktu rentang  perlambatan 30 sampai 330 mili detik. Memiliki tiga jenis pengaturan, antara lain Repeat Rate, Intensity dan Echo. Analog Dm-2 tergolong efek lama/vintage yang sangat terkenal dan biasanya harganya mahal. Effect Dm-2 menggunakan IC MN3005 dan IC compander NE570N


Sumber diperoleh dari http://wlst.jp/

DM-2 Delay


This analog delay pedal is able to produce delay times ranging from 30 to 330 Milliseconds. It’s got three dials with adjustments for Repeat Rate, Intensity, and Echo. This effect draws a lot of current so not all power supplies are able to power up this pedal. The vintage analog DM-2 is a very popular effect and prices are usually very high for a beat up but working pedal.

Version differences
There are at least 3 different versions of the DM-2. The first version was using the MN3005 BBD. This was soon changed to the low current version of the same circuit called MN3205. It is worth noting that the MN3005 has a SN ratio of 75 dB while the MN3205 is a little more noisy with its 67dB. The MN3205 only produces 0.8% distortion compared to 1% for the MN3005.

The DM-2 can be approximately dated by reading the number on the compander IC NE570N. It should have a 4 digit number giving you the year and month of production in the form YYMM. Note that this is the production date of the integrated chip and not of the pedal but it’s unlikely that the chips were stored for very long before used.

    DM-2
    Marking of PCB: ET-5214-510
    BBD: MN3005
    Clock Driver: MN3101 

    DM-2A
    Marking of PCB: ET-5214-510A
    BBD MN3205
    Clock Driver: MN3102

    DM-2B
    Marking of PCB: ET-5214-510B
    BBD: MN3205
    Clock Driver: MN3102

Specifications

  • Controls: Repeat Rate, Echo, Intensity
  • Connectors: Input, Output, AC Adaptor
  • Current Draw: 11 mA (DC 9V)
  • Weight: 450g.
  • Input Impedance: 470kOhm
  • Output Impedance: Over 10kOhm
  • Residual Noise Level: -100dBm (IHF-A)
  • Delay Time: 20ms-300ms
  • Recommended AC Adaptor: ACA Series

Labels

  • Black – Made In Japan
  • Green – Made In Japan

The DM-2 was sold from June 1981 to February 1984.

 

About

Saya adalah penghobi audio dan elektronika, khususnya sebagai guitar effect builder

Posted in Delay - Echo, Efek Gitar Tagged with: , , , , , ,
5 comments on “Boss DM-2 Delay
  1. Ronie says:

    Boss, dah pernah coba dibikin belum?
    Berhasil tidak?
    Oiya, kalo lihat PCB layout di DM-2 pake Transistor nya 7 buah.
    Koq schematicnya cuma pake 4 transistor?
    Trus, kaki IC MN3005 & MN3101 pin 1 koq tdk di ground kan?
    Cek aja datasheetnya.

  2. KUNZ says:

    Mantap info nya, bro.
    Berhasil nih! Soundnya smooth and natural!
    Cek aja di http://www.kunzpedals.com

    Makasih schematicnya, bro!

  3. Uji kepemilikan gitar says:

    Wah perlu dicoba nih..

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