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Showing posts from March, 2017

SOLAR EDGE 8k on air...

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50MHz  antenna direction SOLAR EDGE 8k the fun is gone  with 20dB  extra noise 12 hours a day The SOLAR EDGE  SE8k at 50m distance  contaminates the whole  HF and VHF spectrum  1 to 146 MHz  !! with noise and 200kHz separated digi trash this noise is maximum at the display opening in the case   it is generated by the EMC disaster CPU  The unit is still under guaranty so i can not open it to see what is wrong The provided HF filtering in the PV power lines did not help  since the  RFI is not on these lines  Wire mesh over the display area weakened the noise just a tiny bit The single phase Solar Edge PV converter with optimizer seems to be clean So what is wrong with the SE8k ??


Antenna at minimum noise

474.2 kHz  no sign anymore of WD2XSH/17   last time seen TA decodes was 25 March  Might be that transmissions are stopped fttb  the Aurora did kill all DX on the low bands

U3S 5W PA continued

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My   U3S project  is  almost finished it took a lot of solder smoke.
The plan is a WSPR radio beacon operating  as PU7ZWT from HI11ln
at the allowed bands 160m 80m 15m 12m 10m and 6m
with about 5W power at 12 10 and 6

The 5W PA could not reach 5W level  at the higher bands.
With the PA  inside the case using the bottom of case as heatsink is effective 20W DC input it stays cool.
But i had some self oscillation issues and unwanted reboot at TX start.
No short thin coax but a twisted wire connection between U3S and the LPF unit resulted in more output.
A single BS170 reached 700mW at 5V 28MHz and 600mW at 50MHz
With this drive level it should be easy to reach   5W with the PA if the power gain was 10dB
but is is not.

Important is reading excellent manual and application notes before starting  contructing
That I did not good enough.

My notes:

110R to the gate of the RD15HVF1 this mod must be done.
2  The "Key"  signal  is used to switch the PA 12V at TX time.
 I skipped the exist…

474.2 kHz

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27 and 28 March    Aurora  no WD2XSH/17  decodes


last night with repaired antenna  25 March
50+ decodes again
strongest -9  no other TA signal here
2017-03-26 01:14  WD2XSH/17  0.475640  -9  0  FN42pb  5  PA0O  JO33hg  5630  49 

Desktop QTX s QRP  but  been decoded  by WD2XSH/17 and N1BUG

WD2XSH/17 last night  14  decodes rather weak  -23dB  at best

Today in beautiful weather I showed my antenna's to Marten PA3EKM he brought me the right type s left - right manipulator switch for the 630m tuner.
Then saw the W- Beverage was broken most of the wire laying on the ground and in the ditch but it still receives. 

 2017-03-24 23:52  WD2XSH/17  0.475641  -28  0  FN42pb  5  PA0O  JO33hg  5630  49  2017-03-24 22:20  PA0O  0.475643  -26  0  JO33hg  0.2  EA8/DL9XJ  IL18sm  3335  224  but first time spotted in EA8


Now with the IRFP4227   in the QTX instead of the IRF540Z types
 I had no more blown FET's even not with a short in the coax
It is fail save now.

And  easier remote tuning the V…

U3S continuing

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now using a FOX 27MHz TCXO in the Synthesizer v1.4 PCB
At 27.000.000 almost exact. The CAL setting for correction is disabled.
The 27Xtal  was generating around 27.003.0120
So now the drift is coming close to the K3 stability.
My old IC706  impresses me even more it can run WSPR stable at 144.489 MHz without the Icom optional 30MHz TCXO (obsolet)
Will not order a 30MHz VCXO  with the experience about TCXO's  i have now.



QRP LABS note about some TCXO having discrete frequency steps is unfortunately valid for this  FOX924-27.00
Intolerable a for PLL frequency reference of course.
If i had known that, obviously i would  have chosen a better suited type.
Taitien 27MHz VCXO might be a better choice it is a bit gambling.
Now a Taitien 27MHz is used the Si5351a is very stable stand alone and generates high quality WSPR tones.
The specification does not mention the method ,  temperature compensation or correction?  
My  23cm l.o 1050MHz by DF9NP PLL  uses a TAITIEN 10MHz VCXO .
It doe…

474.2 kHz WSPR Java quota exceeded..

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MW  one of the better nights




 2017-03-20 02:50  WI2XRM  0.475722  -23  0  EL98pd  1  PA0O  JO33hg  7368  41  2017-03-20 03:56  WI2XRM  0.475660  -25  -1  EL98pd  1  PA0O  JO33hg  7368  41  2017-03-20 03:26  WI2XRM  0.475711  -26  1  EL98pd  1  PA0O  JO33hg  7368  41  2017-03-20 02:34  WH2XZO  0.475737  -26  -1  EM85wb  1  PA0O  JO33hg  6882  43  2017-03-20 05:14  WH2XZO  0.475737  -27  0  EM85wb  1  PA0O  JO33hg  6882  43  2017-03-20 02:40  WH2XZO  0.475737  -27  -1  EM85wb  1  PA0O  JO33hg  6882  43 
35 decodes  2x -6
 2017-03-20 01:16  WD2XSH/17  0.475640  -6  0  FN42pb  5  PA0O  JO33hg  5630  49
TX was running  no failures a very wet night with high RF Volts  even with my relative low power
the antenna wire is very "hot"
2017-03-20 02:56  PA0O  0.475660  -26  0  JO33hg  0.2  N1BUG  FN55mf  5297  293 

Today for some time the map view did shut down after few seconds with error message:
The preferred correct term for an error is now: Oops something went wrong


Have had this o…
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160m ant used in RusianDX
nice big contest lot of multy's to get

Rusians 10 points JA W 5 point  EU-EU Rusian 3 point Well worth to search for 10 pointers. S21ZED was on 15m in test easy to work 160m S21ZED 1811kHz heard well at times big pile but RX problems 
N1MM+ worked flawless no T/R delays The latest K3 fw update made QSK a real pleasure  smooth T/R  In N1MM QSK is uverruled by RTS signal but that is good no need for QSK in contest mode    the T/R delay is minimal.




rx only last 24 hour
2017-03-19 05:02  WG2XKA  0.475721  -25  0  FN33lq  0.5  PA0O  JO33hg  5656  49  2017-03-18 23:24  WD2XSH/17  0.475642  -22  0  FN42pb  5  PA0O  JO33hg  5630  49  2017-03-18 23:26  WD2XSH/17  0.475642  -18  0  FN42pb  5  PA0O  JO33hg  5630  49  2017-03-19 01:24  WD2XSH/17  0.475640  -8  0  FN42pb  5  PA0O  JO33hg  5630  49  2017-03-18 23:48  WD2XSH/17  0.475641  -16  0  FN42pb  5  PA0O  JO33hg  5630  49  2017-03-19 00:02  WD2XSH/17  0.475641  -17  0  FN42pb  5  PA0O  JO33hg  5630  49  2017-0…

474.2 kHz night

TX  20%  and RX  active this night
Antenna current indication  over 100%  highest indication i got
The matching is closer to 50Ohms  less losses in coils and tuner
25V  4A
The IRFP4227  seems indestructible at 24V

2 marginal decodes of my QRP signal

 10dB lower snr   on the TX side.

strongest   of 18 decodes
2017-03-17 01:44  WD2XSH/17  0.475640  -8  0  FN42pb  5  PA0O  JO33hg  5630  49
5 decodes both
2017-03-17 03:52  WG2XKA  0.475721  -21  0  FN33lq  1  PA0O  JO33hg  5656  49 2017-03-17 03:44  WG2XPJ  0.475694  -23  0  FN34lp  1  PA0O  JO33hg  5587  50 
 2017-03-17 01:24  WG2XKA  0.475721  -29  0  FN33lq  1  PA0O  JO33hg  5656  49  2017-03-17 00:28  WD2XSH/17  0.475640  -18  0  FN42pb  5  PA0O  JO33hg  5630  49  2017-03-17 03:34  PA0O  0.475614  -30  0  JO33hg  0.2  WD2XSH/17  FN42pb  5630  290  2017-03-17 02:58  WG2XPJ  0.475694  -25  0  FN34lp  1  PA0O  JO33hg  5587  50  2017-03-17 03:16  PA0O  0.475614  -28  0  JO33hg  0.2  N1BUG  FN55mf  5297  293 

DX peditions   are very active…

WSPR dx

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432MHz  super tropo ducting  Hawaii California

160m L antenna used for DX peditons 160m last night
good signal 10.141 MHz 5U5R RTTY    bu 30m antenna needed adjustment now perfect SWR
20170315 2026  10125,0 CW   PA0O         599  3B8/G3TXF       599                  
20170315 2300   1823,5 CW   PA0O         599  5U5R            599                  
20170315 2321   1812,0 CW   PA0O         599  TU7C            599                  
20170315 2330   5360,0 CW   PA0O         599  5U5R            599                  

West Beverage still stands but did not improve reception of  weak 160m  5U5R TU7C signal
Farmers now started spreading manure.


rx only this night MW 17 decodes WD2XSH/17 to -9dB

 2017-03-16 04:18  PA0O  3.594178  -25  0  JO33hg  1  N5CEY  EL16gq  8529  297  2017-03-16 05:14  W6WGF  3.594074  -26  -1  EM12rw  1  PA0O  JO33hg  7923  38  2017-03-16 04:12  KD6RF  3.594117  -20  0  EM22lc  5  PA0O  JO33hg  7909  38  2017-03-16 04:18  P…

WSPR dx ing

some "normal DX-ing at 80m CW split operations
T88XH     3506kHz
S21ZED   3522 kHz

heard 5U5R  9G5X  but JA  US only time



Last night   474.2kHz  no exceptions not a good 630m night. In south Germany  better ( as usual)
I have strong decodes of WD2XSH/17 -10 but no propagation deeper in USA.
Murphy this time it was a broken 12V regulator that normally never happens ;-)
TX worked stable now ANT current  over 100% highest ever but propagation  did not favor my QTH
WSJT-x  missed some good looking traces again strange no restarted PC

 2017-03-15 00:52  WD2XSH/17  0.475638  -23  0  FN42pb  5  PA0O  JO33hg  5630  49  2017-03-15 01:04  WD2XSH/17  0.475638  -10  0  FN42pb  5  PA0O  JO33hg  5630  49  2017-03-14 23:54  WD2XSH/17  0.475638  -22  0  FN42pb  5  PA0O  JO33hg  5630  49  2017-03-14 23:58  WD2XSH/17  0.475638  -20  -1  FN42pb  5  PA0O  JO33hg  5630  49  2017-03-15 00:38  WD2XSH/17  0.475638  -18  0  FN42pb  5  PA0O  JO33hg  5630  49  2017-03-15 00:04  WD2XSH/17  0.475638  -21  0…