PA0O ham radio

operators PA2AWU Arend    PA0O me  PE1BBI Gerard   PC5T Frans rig: 2x 4ele 10m h.b. Arend K3   + K3 backup Acom1000 N1MM+      Lenovo X60 "TEXEL" island location had to be cancelled due to stormy weather. We made it ourself easy and stayed closer to home in a more sheltered place. Stormy wind calmed down Friday afternoon so we could setup the antennas easy. Propagation was still good on 28MHz worldwide except the Pacific and Alaska. This could be the last good propagation ARRL10M for a long time this solar cycle? Band closed sudden at about 1700 local Saturday. Sunday was better 1 hour more propagation until about 1800 local   better USA opening including West coast NW-USA KL7 was the difficult path. site PA0V Nanko

This year weak propagation    33Q/ 16states some few good signals heard but could'n get in the log stopped at 04 am had to get up 9am latest N1MM logger used  nice but could not really test it with the low QSO rate START-OF-LOG: 3.0 LOCATION: DX CALLSIGN: PA0O CLUB: CONTEST CLUB ZUIDWOLDE CONTEST: ARRL-160 CATEGORY-OPERATOR: SINGLE-OP CATEGORY-ASSISTED: ASSISTED CATEGORY-BAND: ALL CATEGORY-MODE: CW CATEGORY-POWER: HIGH CATEGORY-STATION: FIXED CATEGORY-TRANSMITTER: ONE CLAIMED-SCORE: 1056 OPERATORS: PA0O NAME: J.C. van Oosten ADDRESS: Oosterseweg 50 ADDRESS-CITY: ZUIDWOLDE ADDRESS-STATE-PROVINCE: ADDRESS-POSTALCODE: 9785TB ADDRESS-COUNTRY: NETHERLANDS CREATED-BY: N1MM Logger+ 1.0.4350.0 QSO:  1822 CW 2014-12-07 0124 PA0O          599 PA     K3ZM          599 VA       QSO:  1823 CW 2014-12-07 0126 PA0O          599 PA     W3BGT...

Ivn roden en knnv   In memorium Aan “de kleine donder” Beste dwaze, dwarse en drieste marjan Je had veel emotie, ernst en engagement Veel vlinders en vleermuizen heb je gekend Zelfredzaam, zinvol en zorgvol was je leven Ik zal je gedenken en huilen, voor even Lieve, lastige, gave en gekke marjan Ik ben er helemaal nog niet aan gewend Dat je er zo snel tussenuit geknepen bent. Ik wil je toeroepen : “blijf nog even, als je kunt’ Maar luisteren was nooit je sterkst punt. Vaarwel………….

5-December 2014 For the moment the QTX behaves nice  at 24V about 4Amps All temperatures in the save zone.  No extreme heat losses meaning the efficiency is >80%  So RF power should be around 100  The output voltage is 400V tt  is about 115V effective and sinus shape at SWR 1: 2.5.  The antenna current shows about 30%  that is about the maximum i can get here I do not know the real current it is not calibrated but it will be about 2A now. The actual dead toll of IRF540 is 6 now. The last 2 blown up at switching in the 24V  The IRF540 specifies  36A  and 100V you would think a power supply would melt down first seeing  those impressive figures.   Possible the power supply 50000uF elco is causing a too high inrush current . ASP  as simple as possible this is the simple setup  added a 6A meter with 15mV drop using a shunt of Constantaan wire In fact I am almost back to wh...

                                            475kHz  I made a smaller copy of the Wandlerplatine belonging to  Hagenuk profesional Variometer   to measure Antenna currend                                           But now again on trip so had to wait for test                                           in KO92FO for QRL    QRL retirement age again  increased  every year my goverment increases it by a year!  brilliant administration

 TX LED    MW.. Back QRV on 630m Medium wave after some changes now using the IC706 at 475kHz with a mod. For RX a small bandfilter and preamp is improving sensitivity. At TX side also a filter is used made of standard MW IF filters. Then I got the QTX  running its optimal power out at 13.8V. about 30W RF It was stable to run WSPR mode 2 minutes TX frames the airecoils heating up a bit loosing some 5-10W The SM-FET did not even show a temperature raise so the efficiency  was high  approaching 90%. The outside L/C tuning is easy tuning SWR to almost no reflection. Only it had to be done outside at the base of the inverted L 160 antenna. Still a remote tuning is needed or a different approach  using toroid autotransformer to keep the tuning stable enough. Na Wat knutselen 2 avonden   was de QTX weer in orde En de tuning buiten weer afgesteld  SGV 1:1.1  tuner werkte ook nog. Stemt heel mooi af op min SWR max power alle...

Met de IC706  USB dial 474.2   WSPR behalve veel EU WSPR signalen ook de CW ID hoorbaar van   AERO BEACONS   "BIA"  "SA"  "RP" origine onbekend De IC706  gemodificeerd    MW tx enable  met restrictie low power  als signaal bron. DL4YHF  gebruikt de clasic IC706 op 475kHz maar de modificatie dat mogelijk maakt kon ik niet vinden. Deze IC706 was aardig geavanceerd toen hij op de markt kwam zo'n 20 jaar geleden. Geen firmware updates mogelijk het moest allemaal gelijk goed zijn dat is different koek. Nog steeds niet afgeschreven op techniek well done ICOM! Deze mod staat vaker beschreven maar  gaat over het VHF Open the top of the radio by removing the 3 top screws and 2 side screws. Look at the radio with the front panel facing you. Gently pull up the speaker and set is aside without damaging the speaker or the wires that attach it to the rig. Note the silver rectangular box near the middle of the PCB mar...