AM/FM/SW Radio MP3 REC Player V115 SWR-710SV2

Retekess Technology Co., Ltd.; Shenzhen

Data
Forum
Pictures
Collections

  • Year
  • 2019 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 324519

 Technical Specifications

  • Number of Transistors
  • 4
  • Semiconductors
  • Main principle
  • PLL, Phase-locked loop
  • Wave bands
  • Broadcast, Short Wave plus FM or UHF.
  • Details
  • Other Recorder/Player
  • Power type and voltage
  • Storage Battery for all (e.g. for car radios and amateur radios) / Lion: 3.7 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 3.7 cm = 1.5 inch
  • Power out
  • 2 W (unknown quality)
  • from Radiomuseum.org
  • Model: AM/FM/SW Radio MP3 REC Player V115 SWR-710SV2 - Retekess Technology Co., Ltd.;
  • Dimensions (WHD)
  • 4.7 x 3.1 x 0.9 inch / 119 x 79 x 23 mm
  • Notes

  • This is a feature rich world band digital pocket radio, recorder, and MP3 player. Main features:

    • FM band: 87-108MHz
    • MW band: 522-1710KHz (9KHz), or 520-1710 (10KHz), selectable
    • SW band: 4.75-21-85MHz
    • 100 radio presets (auto-scan and direct entry)
    • Dot matrix LCD backlit with programmable timer
    • Menus on 3 languages (Chinese, English, Spanish)
    • Sleep timer from 5 to 90 min
    • MP3/WMA format music player
    • Recorder from buitl-in microphone, from 3.5mm Aux Line in, or from radio reception (selectable from 64kbps, 96kbps, to 128kbps)
    • Nominal audio output power: 2Watt on speaker wth passive bass radiator
    • 3.5mm headphone jack
    • MicroSD card slot up to 32GByte
    • BL-5C 1000mAh rechargeable (cellphone) lithium battery
    • Charging: DC 5V, Micro USB interface

    This radio model is one among several other models from another brands that share the same chassis type. There are at least three chassis types corresponding to different production dates:

    • SWR-710 2014.11.20
    • SWR-710S 2017-4-20
    • SWR-710SV2 2019-3-16

    At least two firmware releases are in use: V1.2 and V1.4

    Besides Retekess, several brands share the above chassis types, like the Audiomax SRW-710S, Kaimeda SRW-710S, Tivdio V-115, and VRrobot_WC-710S.

    The above three chassis types share a common set of components, with minor changes. It uses 4 smd transistors and 4 smd IC's. Transistor Q3 is the RF front-end that feeds the IC3 Stereo FM / TV / MW / LW / SW digital tuning radio AKC6951(55) made by ETC, followed by IC4 Class D Audio Power Amp  MIX2008 made by Mixinno. The IC2 16Megabit Serial Flash Memory 25D16S16 made by Fentech is used by the IC1 Media MicroController FCK6C0N.1 made by AppoTech. This AppoTech IC seems to have several distinct labels on different radio chassis brands and variants, but most probable it is custom programmed for this application and seems to be based on AppoTech  own chips such as the AX2009  or the AX2220.

    A more recent variant of this chassis (2019.11.28) came to the market with Bluetooh capability (using a more recent AppoTech Media MicroController)  and it is in use at least in these radios:

    ZHIWHIS ZWS-603
    Audiomax K603

  • Net weight (2.2 lb = 1 kg)
  • 0.140 kg / 0 lb 4.9 oz (0.308 lb)
  • Author
  • Model page created by Jose Mesquita. See "Data change" for further contributors.

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The model AM/FM/SW Radio MP3 REC Player is part of the collections of the following members.

 Forum

Forum contributions about this model: Retekess Technology: AM/FM/SW Radio MP3 REC Player V115 SWR-710SV2

Threads: 1 | Posts: 1

Retekess has released a new redesigned chassis in 2023 with updated firmware v2.3.

The PCB assembly reference is Kaimeda SWR-710KTR-C 2023.10.11

The circuit design is completely modified with new components when compared with older versions, and the PCB layout has been rearranged to minimize internal noise interference into the antenna.

A CTXC14B5A media controller (IC1) with a P43180/TJ25008M flash memory (IC2) manages a K.T0935R DSP FM-RDS stereo MW SW high sensitivity multiband receiver (IC3) driving a MIX2018 audio power amplifier (IC4).

The RF front-end uses a new design with two SGM3157 SPDT RF analogue switches (IC5, IC6) that connects the internal magnetic antenna to the DSP receiver only when required, and the SW front-end uses one J8/S9018 NPN transistor amplifier stage (Q2).

When compared with the older SWR-710SV2 version, this new V115 SWR-710KTR-C radio shows more sensitivity on all bands and lower noise.

 

 

Jose Mesquita, 15.Sep.24

Weitere Posts (1) zu diesem Thema.