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28 MHz 1 week WSPR

TimestampCallMHzSNRDriftGridPwrReporterRGridkmaz# Spots 2020-03-19 15:50  ZP9CTS  28.126089  -20  -4  GG22ew  0.5  PA0O  JO33hg  10753  32  4  2020-03-16 10:30  EK6FA  28.126075  -23  2  LN20  0.01  PA0O  JO33hg  3192  309  1  2020-03-20 13:02  PA0O  28.126031  -5  0  JO33hg  5  YO3IBZ  KN34bj  1726  117  1  2020-03-14 12:00  OH5XO  28.126093  -22  0  KP41ca  0.2  PA0O  JO33hg  1550  246  5  2020-03-16 14:36  EU7FBB  28.126073  -24  -2  KO43  1  PA0O  JO33hg  1476  278  1  2020-03-15 09:32  OH6MQM  28.126089  -14  -4  KP12iq  0.2  PA0O  JO33hg  1405  229  1  2020-03-16 09:20  UR5KSH  28.126092  -8  0  KO30co  0.2  PA0O  JO33hg  1370  290  25  2020-03-16 10:16  OK2SAM  28.126112  -19  0  JN99du  0.5  PA0O  JO33hg  890  300  2  2020-03-16 14:24  F5REF  28.126029  -22  -1  JN07  0.2  PA0O  JO33hg  759  30  1  2020-03-20 08:52  G8CQX  28.126051  -16  -1  IO81xu  20  PA0O  JO33hg  606  72  2  2020-03-19 07:22  PA0O  28.126024  -26  0  JO33hg  5  DK6UG  JN49cm  431  165  2  2020-03-14 11:50  OZ7IT  28.126093  -19  0  JO65df  5  PA0O  JO33hg  428  242  11  2020-03-14 11:00  PA0O  28.126035  -21  0  JO33hg  1  OZ7IT  JO65df  428  57  8  2020-03-16 15:08  ON7WP  28.126109  -27  0  JO21ic  0.2  PA0O  JO33hg  274  28  2  2020-03-18 16:48  ON7KB  28.126091  -25  -1  JO21ei  5  PA0O  JO33hg  262  35  2  2020-03-19 16:36  DJ1AA  28.126101  -24  0  JO41  100  PA0O  JO33hg  254  322  1  2020-03-14 16:34  PB0AIC  28.126137  -25  0  JO21fv  5  PA0O  JO33hg  212  43  8  2020-03-20 08:22  PA3ABK  28.126097  -19  0  JO21it  5  PA0O  JO33hg  208  38  2  2020-03-18 07:58  DD1IR  28.126124  -21  0  JO43un  5  PA0O  JO33hg  207  262  3  2020-03-14 10:26  PA7EY  28.126120  -21  -4  JO22jj  20  PA0O  JO33hg  157  51  112  2020-03-14 10:38  PA0O  28.126038  -23  0  JO33hg  1  DL0HT  JO43jb  146  98  13  2020-03-16 07:00  PA0O  28.126029  -27  0  JO33hg  5  DK0DLR/1  JO43am  98  73  2  2020-03-16 14:02  PE1FJN  28.125991  -17  -3  JO32bl  50  PA0O  JO33hg  94  21  15  2020-03-14 16:36  PD0HF  28.126059  -19  -4  JO22wn  2  PA0O  JO33hg  93  32  13  2020-03-16 15:38  PA0RBL  28.125998  -18  0  JO32am  5  PA0O  JO33hg  92  25  6  2020-03-15 09:30  DL0PBS  28.125991  -23  0  JO33  0.05  PA0O  JO33hg  32  224  84  2020-03-14 10:34  PA0O/P  28.126005  -5  0  JO33lc  5  PA0O  JO33hg  29  310  211  2020-03-14 11:20  PD0OHW/M  28.126115  -7  0  JO33lc  5  PA0O  JO33hg  29  310  66  2020-03-14 10:38  PA0O  28.126056  -9  0  JO33hg  1  PD0OHW  JO33lc  29  130  58  2020-03-14 10:22  PD0KT  28.126125  -5  0  JO33le  0.01  PA0O  JO33hg  24  293  380  2020-03-14 10:38  PA0O  28.126041  -11  -1  JO33hg  1  PA0SLT/4  JO33kg  17  90  39


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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