PA0O ham radio

  I choose to enter the low power 100W max. contest section.   K3 i-L 25m vertical and rx Beverages E/W Since in our ADSL2+ network a "notch" is set by the KPN network provider,what a relieve! finally. TX-ing 1.8MHz  is without interfering our network TV. Did you know that  ADSL2+  is using 1-2 MHz base band ? The KPN helpdesk man and woman do not know this. Friendly people but they are schooled in "communication" that's how they call it in the University and schools it has nothing to do with technical communication but it is a sort of training to build a pleasant buffer between the public and authorities in general, many good job's to get in this field !   Thanks to a real KPN technician the ADSL2+ carriers within 1.8 -  2.0 are switched off, called a notch. This is the only way to get rit of 1.8MHz RFI in the network all other methodes failed. My result at Sunday morning band close  630Q  ZF5T XE2X 2-way great receiving !  75 mult...

 Strong passage of ISS   Receiving results at 472.4 kHz are very poor this year no USA decodes seen so guess the receiving antenne has a problem.  The 40m rotating dipole "lineair loading" 14m shorted works reasonable. Tuned in band the top wire capacitieve loads are very critical in length. 10cm / 100kHz .  I now use special very flexible  wire and a small nut  end weight to keep the wires 120cm  lenght stretched.   Last night at 7.093  the NL Nasiballen round  VE1CHW  slightly better copy on the dipole about 1 s-unit in favor of the dipole at 22m a.g.  against the GP with base at 1m above ground. The GP is a much easier antenne to set up.  

  24 hour result with Flex1500 rx  /tx 5W   80m       Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az Mode  2021-01-22 16:54   VK7DIK   3.570144   -17   0   QE38cu   5   PA0O   JO33hg   16733   308   2   2021-01-22 16:28   VK7DIK   3.570144   -17   0   QE38cu   5   PA0O   JO33hg   16733   308   2   2021-01-22 18:48   VK7DIK   3.570144   -22   0   QE38cu   5   PA0O   JO33hg   16733   308   2   2021-01-22 18:06   VK7DIK   3.570144   -14   0   QE38cu   5   PA0O   JO33hg   16733   308...

  Picture shows the U3S -deluxe  with PA build into the U3S housing (deluxe). Powered by 12V  1.5A max 1 UA7805 for the U3S 5V, A IRF9510 P-channel + NPN BC557  to make TX 12V switched by the  U3S "key" and an connected  UA7805 for TX5V.  The 5 band LPF board the U3S with the 80m LPF0 not visable the small coax cables to the underside of the U3S to place the LPF 0 and 1 2 3 4 5 behind the PA .   This multi mode multi band automatic beacon transmitter is a best seller by QRP LAbs kit by Hans Summers I  build 3 of them, one time they should run as WSPR beacon PU7ZWT in HI11ln  N-E Brasil Some issues : Had to replace the original cheap PC 27MHz kristal with a far more stable TCXO Taitien the blue potmeter PCB More output: I use an eBay 2 trap HF VHF PA having a RD15HVF1 power Mostfet in the final RD15xxx Mitsubishi  power MOS-FET are  used in many rigs like the K3 LPA it can operate from HF to 450 MHz. Its Source is  the...