BAOFENG "BF-888S" the "20 Euro-UHF-WalkieTalkie"
---- under construction ----
November 27th. 2012


for English Manual see [1]





Rem.: Possible are also channel spacings less than 25KHz, like e.g. 6.25KHz as needed for 446MHz PMR


INSIDE


BF-888S: main board mounted on heatsink


BF-888S: heatsink


BF-888S:  main board : component side


TECHNICAL DETAILS

Mayor part of BF-888S is two way radio chip "BK4810" from BEKEN Corporation in China [2]. Detailed specs on this chip could not be found, but it must be quite similar to version "BK4800" ( but without some additional functions like e.g. FSK modem ) as described here with more details:


BF-888S: general function block diagram




Radio chip "BK4810" and MCU "B86F88H" inside radio "BF-888S"


DEFAULT CHANNELS "OUT OF THE BOX"


Following list is from "Baofeng BF-888s Review" like it can be found in UK forum: http://www.transmission1.co.uk [3]


BF-888S: frequencies in delivery status

ATTENTION:
In most cases operating these frequencies would be against national law. 
Supposely legal use only is possible for licensed radio hams within 70cm amateur band.
( I guess also using PMR446 channels [ 446.0-446.1 MHz ] would be illegal )


SPECIAL FUNCTIONS

Following list is from "Baofeng BF-888s Review" like it can be found in UK forum: http://www.transmission1.co.uk [3]




ADAPTORS FOR PROGRAMMING AND EXTERNAL MIC/SPEAKER

For programming i did use a standard USB<>RS232 cable and home made adaptor according to circuit from PA3FYM like shown above.
Suitable software can be found under [7] and [8]


Pinning for external Speaker and Mic ( like also be used for e.g. KENWOOD Radios )

LINKS

[1]  http://www.facebook.com/media/set/?set=a.450251321676039.105252.345196775514828&type=3 ( English Manual )
[2]
  http://www.bekencorp.com/en/Botong.Asp?Parent_id=2&Class_id=8&Id=12  ( BEKEN Radio Chip Manufacturing  )
[3]  http://www.transmission1.co.uk/forum/viewtopic.php?f=4&t=30260  ( English Language Forum )
[4]  http://pmr-funkgeraete.de/forum/showthread.php?5231-Erfahrungen-mit-Baofeng-BF-A5   ( German Language Forum )
[5]  http://hamgear.wordpress.com/2012/08/11/review-baofeng-bf-666s-bf-777s-bf-888s-and-look-alikes/  ( BF-888S Review by Hans, PD0AC )
[6]  http://hamgear.wordpress.com/2012/11/26/baofeng-bf-666777888-audio-mod-frequency-adjustment/  (  BF-888S Modifications by Hans, PD0AC )
[7]
  http://www.powerphone.com.cn/en/DownFile.asp?8 ( Programming Software )
[8]  http://www.zastone.com/EN/Upload/2011-6-26/ZT-V68%20CABLE.zip ( alternative Programming Software )
[9] 
http://www.zastone.com/EN/Product.asp?ID=962 ( alternative Manufacturer )

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