Sunday, December 19, 2010

DELL OPTIPLEX as radio PC and Eminent w-lan router

Purchased an Dell Optiplex GX620  P4 3.2GHz HT  75GB HD  small quiet PC  occasion for 99€. Has the trusty XP  OS  so i hope to got rid of the communication hangers with the USB-serial i have with W7pro 64b  and N1MM  Also i wanted to have a WSPR N1MM dedicated PC in the shack.
This one is RF(almost) and audio-wise quiet and has low power consumption for 24x7x365 purpose.

I gave up W7pro-64 with N1MM and USB-serial converter it is not stable i have to reset the interface too often it is meshing up my logging and it is a nerving me.. Until now no hangups it is quiet almost forgot it is running on the desktop.

In the same shop i purchased an Eminent Em4570 router  to replace the  RF  noisy Linksys WRT54G with its build in 2 step-down very noisy switchers i could not silence the RFI in 14-30 MHz band.
This Eminent seems to be of higher quality  it has a metal case  whereas the Linksys is in a plastic box.
The WRT54G has 2 external antenna connections of type reverse-TNC  i use an outdoor Antenna over a short RG213 2x N cable to a double loop reflector antenna  and have a RP-TNC to N-Female adapter for that.
But  EMINENT uses 3  SMA smaller types for 3 whip antenna's
This is the SMA connector at the EM4570   it is confusing but this seems to be a RP-SMA-Female with pin!
And the counter part is the RP-SMA-M male with jack...  Confusing a reverse polarity male is a female...
A sort of lesbian SMA connector.


above is the connection at the EM4570 whatever it is called...

 For the outside antenna  I need an other N-SMA adaptor. The WIFI range supposed  to be improved against the WRT54  
But i still need an outdoor antenne with snow at the roof the signal is to weak over 50m














The Dell Optiplex GX620  mini desktop still has all the connectors needed for Hamradio

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Good RF gasket shielded cover plate.
external power adapter 12V 18A the black box behind  QTX 500kHz tx..
Some carriers heard on 28Mhz from the PC / Power not very bad  smal band signals not localized where from. Uncovering the PC did not raise the strenght of the cariers.  

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