Skip to main content

Stability of XP USB prolific WSPR N1MM

3 months Since the end of last year until now  i have a Dell Optiplex GX620  P4 running   with Windows XP -32 (X86) 
WSPR is running  24x7   i have had no hangers   no reboots needed.
I am using the Prolific chip USB-serial  adapter.  
This Prolific is suspected to have errors when using it with N1MM
But it never gave an error with WSPR.
One time i had an error with N1MM  during the PACC contest.
The frequency displayed at the logger was out of control. That was corrected by reset interface  it did not occur again.
This same error appeared very often when using W7-64 pro  and  N1MM+ prolific (or any other??)  USB-serial.

My conclusion  is  100% stable for WSPR
and almost 100% with N1MM

The same time I purchased an other  W-LAN router
The Eminent Gigalink 300N  to get rid of the Linksys router that is giving RFI on shortwave.
I am using the WRT54G V5 with an outdoor antenna.
I could not replace the Linksys WRT54G V5    because the
300N standard uses 3 antennas in a special way 1 antenna port is receive only. All 3 antenna signals must be present.  I can not connect 1 antenna port to an external antenna for 300N standard.
The Eminent is metal case  and i could not hear any RFI when it is on. But i can not get a strong  signal over 50m  outside either when placing it behind the glass window. Until now the Linksys is much stronger.
Although in the shop they told me the signal would be a big improvement with this type.

I am afraid that all W-LAN  equipment that passes the EU  regulations is useless for serious work.
I will have to get a router from outside the bureaucratic EU zone..


Popular posts from this blog

SPF5189z Low noise preamp 23cm

14-4-2018 updated

Above the low noise  preamp 50 - 4GHz    ebay  6€

Tested  2 small porto antennas
1 Baofeng UV antenna left   2nd best signal on PI2NOS
2 eBay DIAMONDSRH805S  wide band 144/432/1200  it works for its size as expected
3 piece of wire :   best signal in the setup...

Unit under test at workbench.
It was stable  50mA  at 5V   few days,  but sudden the current went up to 100mA
And i could  no longer adjust it with the negative bias Voltage.
The - Voltage went to zero and the SPF input port became low Z.
This SPF5189z was broken  no oscillations, no input overload just it broke while i was receiving the PI2NOS 430.125 using a small antenna at the workbench.

The specs of  SPF5189z  say it has an internal circuit  regulating the bias current.
Replaced . again   with an other of the 5 spare SPF i have.
The new one again could be adjusted at 50mA  5V 
The current raises to 150mA  when removing the  negative gate voltage.
Where is that internal bias circuit ?
I suspect  eBay …

2011-01-22 DIAMOND X30 2m 70cm 1m30 Colinear inside

Having relative poor signals on the local 70cm / 2m channels using this Diamond collinear 70/2 combi antenna at a height of 25m. I needed to investigate what could be wrong.
Measuring the cable only 3W is left for the antenna of the 10W 435MHz output from a IC451E
The cable is 30m type H100 Z50 10mm outside diameter it is semi air-spaced but has an impossible 4mm² solid CU inner conductor not much air left. I preferred the H43 Z75 cable having lower loss and mechanical better ratio in conductor size but it is no longer selling i think. This H43
3W should be enough for a comfortable noise free FM signal. But only 27km away at PA0A the signal is weak too weak something must be wrong? I made a simple reference dipole of 2x17cm CU wire.
With this dipole the signals where totally worse. So the Diamond does work?
I got curious to look inside. Maybe moisture penetration degraded the antenna.
This  antenna is rainwater close in its normal vertical mounting position. But take care if your mast can b…

Nice opening10m and 12m to S.A.

SFI  low 70 a 16 K3  still 10m opened up in afternoon to N-Italy EA5 F JN33
F/PD0OHW/M in JN33 decoded 150mW

VP8LP  12m    2-way with GP 7m ag swr 1:3

60m 5,362 open to ZL every? morning