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U3S project 1rst time on air





After the 28MHz freq drift stabilized a bit i connected my antenna the U3S for its maiden test.
PD0OHW could decode the beacon that eventually is for him as he will use PU7ZWT HI11ln
but still under test and waiting for a new Si5351A pcb . My attempt to replace the Si chip on the defective PCB did not help the Si5351a error still pops up on the U3S display at boot  the I2C signals are present and the 3 ports carry RF  so the replaced Si chips work but can not communicate with Progrock or U3S
For unknown reason  Hans Summers  told me the Si5351a  is not pre programmed standard.
original stamp Si5351a
5351
B4DQ
  447
replace chips stamp
5351
BHJN
 632
  although  it was relative easy to replace this very small device
both PCB  still suffer same problem

I was decoded  with 300mW at 28MHz
 2017-03-11 06:30  PA0O/U  28.126152  +30  -4  JO33hg  0.2  PA0O  JO33hg  0  0  2017-03-11 10:52  PA0O/U  28.126160  -12  -3  JO33hg  0.2  PG0DX  JO33ce  29  252  2017-03-11 00:10  PA0O/U  28.126135  -19  -2  JO33hg  0.2  PD0OHW  JO33lc  29  130  2017-03-11 08:42  PA0O/U  28.126139  -23  -1  JO33hg  0.2  DK7BY  JO33sl  65  69  2017-03-11 08:02  PA0O/U  28.126141  -30  -1  JO33hg  0.2  DK0FHW  JO43bn  105  71

for me it was important to see  that there is 1 decode per timeframe
 no multy 50Hz traces  as i see here on the monitor receiver

my screen  the U3S tx 2 x 2 minutes  the 1rst frame is decoded  the second makes WSJT-x hanging
WSPR-x can not handle this signal it freezes .
 Lot of 50Hz spaced IMD traces
The signal sounds T9   with very weak hum  detectable close to the carrier.
I now supply the U3S from a 12V  1.5A  sm-adapter  the 12V is regulated to 5V  for the U3S
and then another 3V3 regulator for the Si5351A  unit
Question is where is that 50Hz traces pattern coming from?  The sm mode does not use  50Hz.






474.2 kHz  report 

                                                          qtf  070
last night  Friday the east Beverage had to be removed. West is still there but now moved from WNW to west

12 decodes  little improved  2 call heard last night
 2017-03-11 04:06  WD2XSH/17  0.475646  -22  0  FN42pb  1  PA0O  JO33hg  5630  49 
 2017-03-11 04:06  WG2XPJ  0.475634  -28  0  FN34lp  1  PA0O  JO33hg  5587  50 

 2017-03-10 06:04  WD2XSH/17  0.475645  -27  0  FN42pb  1  PA0O  JO33hg  5630  49 
 2017-03-10 05:52  WD2XSH/17  0.475645  -31  0  FN42pb  1  PA0O  JO33hg  5630  49 
 2017-03-10 04:28  WD2XSH/17  0.475645  -23  0  FN42pb  1  PA0O  JO33hg  5630  49 
 2017-03-10 00:22  PA0O  0.475758  -27  0  JO33hg  0.2  SV8RV/1  KM07ks  2042  142 
 2017-03-10 01:22  PA0O  0.475758  -28  0  JO33hg  0.2  SV8RV/1  KM07ks  2042  142 
 2017-03-10 02:22  PA0O  0.475758  -27  0  JO33hg  0.2  SV8RV/1  KM07ks  2042  142 
 2017-03-10 02:22  PA0O  0.475757  -30  0  JO33hg  0.2  EA7HPM  IM67xj  2017  214 
 2017-03-10 03:20  PA0O  0.475757  -28  0  JO33hg  0.2  EA7HPM  IM67xj  2017  214 
 2017-03-10 01:10  EA5DOM  0.475610  -18  0  IM98xn  1  PA0O  JO33hg  1713  15 

 propagation still gone here no TA decodes seen
My Tuner   loading transformer  improved   to 4:1
resulting making it closer to 50 Ohm  input.
Using the IRL540  now the  relative antenna current reached the 80%
Sudden  my last IRF540Z  was smoked  having over 100W DC input at 23V 4.5A
the IRF stayed cool the TX air estimate 10W lost

I just changed the loading transformer  to bring the impedance lower
400V tt at the output indicated that the impedance was  way over 100Ohm
It looked much better and healthier  but  no..






                                            sinus = QTX out  50V/div    pulse = drain pulse 50V/d

                                            80%   # 100W rf   still the same prototype on the desk
                                             the loading transformer with home made sort of litze
                                            changed to 4: 1   8w 4w   it was 17:5wdg   ( here showing 9  3wdg)
                                            lowering the input voltage to about 80V at 80W rF
                                              Had to use the IRL540  The better IRF540Z was lost
                       okay i know this is small power at 474.2  I could not reach EA8 with it until now
                       


WSPR last 24 hours  distance ascending

 2017-03-08 19:02  PA0O  3.594025  -24  0  JO33hg  10  VK7DIK  QE38cu  16733  82 
 2017-03-08 19:02  PA0O  3.594015  -19  0  JO33hg  10  VK6XT  OF86td  14304  97 
 2017-03-07 21:16  VK6XT  3.594006  -16  0  OF86td  5  PA0O  JO33hg  14304  314 
 2017-03-07 22:42  VK6XT  3.594007  -25  0  OF86td  5  PA0O  JO33hg  14304  314 
 2017-03-08 18:22  PA0O  3.594015  -21  0  JO33hg  10  VK6XT  OF86td  14304  97 
 2017-03-08 20:30  VK6XT  3.594006  -22  0  OF86td  5  PA0O  JO33hg  14304  314 
 2017-03-08 19:02  PA0O  3.594019  -21  0  JO33hg  10  VK6FR  OF78ve  14023  97 
 2017-03-07 20:42  VK6FR  3.594039  -19  0  OF78ve  5  PA0O  JO33hg  14023  316 
 2017-03-07 21:02  VK6FR  3.594039  -23  0  OF78ve  5  PA0O  JO33hg  14023  316 
 2017-03-07 21:22  VK6FR  3.594039  -22  0  OF78ve  5  PA0O  JO33hg  14023  316 
 2017-03-07 21:10  VK6FR  3.594039  -20  -1  OF78ve  5  PA0O  JO33hg  14023  316 
 2017-03-08 05:22  QA8TCL  0.475717  -32  0  NH08  0.002  PA0O  JO33hg  10019  325 
 2017-03-07 22:04  ZS1OA  5.288663  -24  0  JF95fx  5  PA0O  JO33hg  9774  353 
 2017-03-07 21:38  ZS6SRL  5.288685  -25  0  KG33wv  5  PA0O  JO33hg  9062  347 
 2017-03-08 03:48  ZS6SRL  5.288689  -23  0  KG33wv  5  PA0O  JO33hg  9062  347 
 2017-03-08 05:54  KD6RF  3.594117  -9  0  EM22lc  5  PA0O  JO33hg  7909  38 
 2017-03-08 05:10  KD6RF  3.594117  -17  0  EM22lc  5  PA0O  JO33hg  7909  38 
 2017-03-08 05:22  NQ6N  3.594160  -21  0  EN51wr  5  PA0O  JO33hg  6697  43 
 2017-03-08 05:22  KD7YZ  3.594178  -26  0  EM88ll  1  PA0O  JO33hg  6661  44 
 2017-03-08 01:50  N8AYY  3.594048  -14  0  EN72wd  5  PA0O  JO33hg  6434  45 
 2017-03-08 04:50  N8AYY  3.594048  -16  0  EN72wd  5  PA0O  JO33hg  6434  45 
 2017-03-08 03:50  N8AYY  3.594048  -19  0  EN72wd  5  PA0O  JO33hg  6434  45 
 2017-03-08 05:52  N8AYY  3.594048  -4  0  EN72wd  5  PA0O  JO33hg  6434  45 
 2017-03-08 00:10  N8AYY  3.594048  -18  0  EN72wd  5  PA0O  JO33hg  6434  45 
 2017-03-08 05:30  K3RWR  3.594144  -9  0  FM18qi  5  PA0O  JO33hg  6279  45 
 2017-03-08 05:40  K3RWR  1.838144  -23  -1  FM18qi  5  PA0O  JO33hg  6279  45 
 2017-03-08 00:02  K3RWR  3.594144  -14  0  FM18qi  5  PA0O  JO33hg  6279  45 
 2017-03-08 02:02  K3RWR  3.594144  -11  0  FM18qi  5  PA0O  JO33hg  6279  45 
 2017-03-08 03:02  K3RWR  3.594144  -12  0  FM18qi  5  PA0O  JO33hg  6279  45 
 2017-03-08 05:22  WB3AVN  3.594035  -8  0  FM19og  5  PA0O  JO33hg  6218  46 
 2017-03-08 06:22  WB3AVN  3.594035  -12  1  FM19og  5  PA0O  JO33hg  6218  46 
 2017-03-08 04:50  WB3AVN  3.594035  -9  0  FM19og  5  PA0O  JO33hg  6218  46 
 2017-03-08 04:10  WB3AVN  3.594034  -8  0  FM19og  5  PA0O  JO33hg  6218  46 
 2017-03-08 05:02  WB3AVN  3.594035  -29  -1  FM19og  5  PA0O  JO33hg  6218  46 
 2017-03-08 05:30  WB3AVN  3.594034  -10  1  FM19og  5  PA0O  JO33hg  6218  46 
 2017-03-07 23:10  AA3GZ  3.594161  -22  -1  FN20kh  100  PA0O  JO33hg  6035  47 
 2017-03-07 23:46  AA3GZ  1.838156  -21  0  FN20kh  100  PA0O  JO33hg  6035  47 
 2017-03-07 23:30  AA3GZ  3.594162  -6  0  FN20kh  100  PA0O  JO33hg  6035  47 
 2017-03-07 23:36  AA3GZ  3.594161  -20  0  FN20kh  100  PA0O  JO33hg  6035  47 
 2017-03-08 01:56  KK1D  3.594041  -12  0  FN31vi  1  PA0O  JO33hg  5776  48 
 2017-03-08 04:42  KK1D  3.594040  -15  0  FN31vi  1  PA0O  JO33hg  5776  48 
 2017-03-08 05:36  WA9WTK  3.594063  -16  0  FN42fk  5  PA0O  JO33hg  5654  49 
 2017-03-08 05:54  WA9WTK  3.594063  -15  0  FN42fk  5  PA0O  JO33hg  5654  49 
 2017-03-08 03:30  W1XP  3.594074  -6  0  FN42fo  5  PA0O  JO33hg  5642  49 
 2017-03-08 04:42  W1XP  3.594074  -7  0  FN42fo  5  PA0O  JO33hg  5642  49 
 2017-03-08 05:22  W1XP  3.594074  -4  0  FN42fo  5  PA0O  JO33hg  5642  49 
 2017-03-08 03:56  W1XP  3.594074  -22  0  FN42fo  5  PA0O  JO33hg  5642  49 
 2017-03-08 02:56  W1XP  3.594074  -9  0  FN42fo  5  PA0O  JO33hg  5642  49 
 2017-03-08 06:16  W1XP  3.594074  -10  0  FN42fo  5  PA0O  JO33hg  5642  49 
 2017-03-07 23:16  W1XP  3.594073  -27  0  FN42fo  5  PA0O  JO33hg  5642 



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