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WSPR 24uur

WSPR gaat gewoon door terwijl we even op de FRM in Beetsterzwaag waren en Ameland  met schitterend weer.

WSPR overzicht
Gesorteerd op DX  bands  all  unieke decodes laatste 24 uur

na lange tijd weer eens een USA decode op 160m   De hoge banden laten het behoorlijk afweten  weinig ES en mogelijk daardoor weer wat DX  decodes op 160 en 80  ik denk dat het rechtstreeks verband met elkaar heeft.

Deze 160 decode ontbreekt  in de all band unieke decode  query  lijkt me een fout (tje)

 2014-06-01 01:14  PA0O  1.838079  -25  0  JO33hg  5  N2NOM  FN22bg  5933  294

 2014-05-31 21:44  PA0O  3.594052  -23  0  JO33hg  5  VK7DIK  QE48cq  16876  81 
 2014-06-01 06:36  VK5MR  28.126127  -17  0  PF96lh  10  PA0O  JO33hg  15704  315 
 2014-06-01 02:24  PA0O  3.594063  -24  0  JO33hg  5  K9AN  EN50wc  6829  300 
 2014-06-01 01:56  K9AN  3.594174  -16  0  EN50wc  1  PA0O  JO33hg  6829  43 
 2014-06-01 01:38  PA0O  3.594068  -23  0  JO33hg  5  KC2LZO  FM19tn  6169  292 
 2014-06-01 00:02  PA0O  3.594060  -24  0  JO33hg  5  N2NOM  FN22bg  5933  294 
 2014-05-31 11:50  PA0O  50.294432  -26  0  JO33hg  5  4X1RF  KM72ls  3201  124 
 2014-05-31 18:16  PA0O  50.294455  -22  0  JO33hg  5  CN8LI  IM63nx  2395  212 
 2014-05-31 18:22  CN8LI  50.294477  -26  -1  IM63nx  5  PA0O  JO33hg  2395  22

De map is er  niet mooier op geworden met overal ballonnetjes.
Propagatie is matig 

70.212 MHz  LZ2DO 
nieuw  (ben een radio amateur ga niet over de licenties) 


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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