Andi provides detailed info and photos of the new Degen DE1103 DSP

de1103-dsp

Regarding the new DSP version of the Degen DE1103, SWLing Post contributor, Andi_84, writes:

I’ve opened [my Degen DE1103] and checked the semiconductors inside.

It’s definitely based on a Silicon Labs chip (Si4735-D60).

1) Display PCB
Valence Tech AP651 “LCD AND KEYBOARD CONTROLLER”: http://www.valencetech.com/products.php?prodID=ap651&type=ics
Datasheet: http://www.valencetech.com/doc/AP651/DS_AP651-Rev0.1.02.pdf

2) Main PCB

a) Silicon Labs Si4735-D60 “AM/FM/SW/LW Radio Receiver IC”: http://www.silabs.com/products/audio/fm-am-receiver/Pages/si473435.aspx
-> Chip is even capable of RDS, but it’s unfortunately not implemented in the DE1103
And, FM range covers down to 64MHz, while the DE1103 goes only down to 76MHz
Datasheet: https://www.silabs.com/Support%20Documents/TechnicalDocs/Si4730-31-34-35-D60.pdf

b) ST Micro STM8L152C6T6 “Ultra-low-power 8-bit MCU with 32 Kbytes Flash, 16 MHz CPU, integrated EEPROM”
Datasheet: http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/CD00240181.pdf

c) China Hua Jing Electronics CD1622CB “110mw X 2 Dual-channel audio power amplifier”
-> Looks like a “chinese version” of the Sony CXA1622M
Datasheet: http://www.datasheet.hk/view_download.php?id=1039877&file=0024%5Ccd1622cb_203207.pdf

d) LM358 “Low-Power, Dual-Operational Amplifiers”
Datasheet: http://www.ti.com/lit/ds/symlink/lm158-n.pdf

Photos

The following photos are courtesy of Andi_84. Please click the image to enlarge.

External and unboxing

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Internal and circuit board

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Many thanks, Andi!  These photos are excellent and certainly give us more insight into the new Degen DE1103 design.

I’m very curious how this new DE1103 compares with other DSP portables on the market.

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15 thoughts on “Andi provides detailed info and photos of the new Degen DE1103 DSP

  1. Edward

    I take a jaundiced eye towards these DSP boxes. I have an old Radioshack DX330 and had a ESD event that popped the antenna input FET. Fortunately I was able to replace it with another JFET. If something like that happened to this 1003, could it be repaired by anyone other than the manufacturer. Even if you were lucky to find a DSP chip, where would you get the code to program the replacement? My feeling this radio would turn into a piece of e-waste in that situation.

    Reply
    1. Andi_84

      In the case of the DE1103, replacing the DSP chip (the Si4735-D60) would be possible. The chip is available from various distributors and already contains the required firmware.
      (Ok, you’d need the appropriate equipment to solder / unsolder a QFN chip).

      Reply
      1. Edward

        I tend to keep my stuff for a very long time, so if I were to get this I probably may need to get a critical component spares kit to go into the strategic stock pile. Still have my old RadioShack Realtone 4 bander that I bought in the 1960’s with my paper route money. Even have the schematic. What gets me is why they (Degen) don’t have a schematic or a service manual. That could be a selling point. When I bought my Fridge and Washer I handed the salesman a USB thumb drive to put the service manual on. The ones who couldn’t/wouldn’t didn’t get the sale.

        Reply
        1. Thomas Post author

          An RS Realtone 4 bander? We must see some photos! Those are so much easier to repair when something goes wrong. It is true that most consumer electronics these days not only don’t ship with a schematic, but were never designed for repair.

          Gotta love planned obsolescence.
          -Thomas

          Reply
  2. john

    Hi,an information
    In this new degen 1103 in digital mode with the DSP,Can I change o insert the ceramic filters of 110-80 Khz for the FM band?
    Because with these filters improve the sensibility and the selettivity of this radio in the FM band,because I listen only the FM in the summer months for catch the radio stations in FM band in Es and in tropo propgation possible only with the insert of these ceramic filters into the Degen 1103?I don’t know how is with the DSP if is equal
    regards

    Reply
    1. Andi_84

      No, as the DSP-based version of the DE1103 has no ceramic IF filters at all, you can not change them.
      The IF bandwidth is controlled within the DSP.

      Reply
  3. Edward

    Nice photos! I have a lot in common, I do more than “pop the hood” of a brand new radio that I just purchased. Is there any chance you have the schematics?

    Reply
    1. Andi_84

      Unfortunately, I do not have any schematics of the new DE1103.
      Maybe I’ll try to draw them by analyzing the PCB traces and component values – if I find time for that.

      Reply
    1. J.Carlos

      É mesmo uma comparação ,estou para comprar um no Ebay mas só vejo com DSP .
      Ja vi e li comentários que não ficou bom com este CI DSP .
      Precisa alguem comparar o Degen 1103 com DSP e sem DSP para ver qual o melhor .
      Bom ja aprendi que os Degen 1103 que a faixa FM inicia em 76,00MHz é sem o CI chip
      Silicon Labs ( Si4735-D60 )
      Quantos os Degen1103 que a faixa de FM inicia em 64MHz ja esta com o CI chip
      chip Silicon Labs ( Si4735-D60 )
      Que ano será que os radios Degen 1103 começou sair com este chip Silicon Labs ( Si4735-D60 )
      alguem sabe ?
      J.Carlos pu2olt
      Visite: http://qsldobrasil.blospot.com

      Reply
    1. J.Carlos

      É mesmo uma comparação ,estou para comprar um no Ebay mas só vejo com DSP .
      Ja vi e li comentários que não ficou bom com este CI DSP .
      Precisa alguem comparar o Degen 1103 com DSP e sem DSP para ver qual o melhor .
      Bom ja aprendi que os Degen 1103 que a faixa FM inicia em 76,00MHz é sem o CI chip
      Silicon Labs ( Si4735-D60 )
      Quantos os Degen1103 que a faixa de FM inicia em 64MHz ja esta com o CI chip
      chip Silicon Labs ( Si4735-D60 )
      Que ano será que os radios Degen 1103 começou sair com este chip Silicon Labs ( Si4735-D60 )
      alguem sabe ?
      J.Carlos pu2olt
      Visite: http://qsldobrasil.blospot.com

      Reply

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