Skip to main content

ARRL10M

Even with SF=73 and minimal band conditions compared to previous years where all of  USA was workable
it was again an interesting event  including nightly antenna work.
And still interesting DX  like 3B9HA and others



 4ele 10 and15m put up for this occasion.  Sunday morning i could see the result in daylight.

Started with low power and dipole S&P  Saturday
Decided to change from dipole to 4 el  that kept me busy Saturday afternoon till after dark
No good timing since Saturday afternoon  and evening held the better part of propagation.
But it was still dry no wind and I thought  the cold i had was cured...

New is a solar panel PV-C  20dB noise   in North direction from west to east.
The last year new PV converter of my  neighbor does generate noise from 1 to at least 70MHz
broad  noise  and  digi spurious each 200kHz  to  9+20 at 14MHz
I have done some noise tracing and found the noise source is concentrated near the display/CPU
of this PV-converter even when there is no solar energy produced,
Just as long as the CPU is active before it goes to idle there is noise coming from the CPU part.
I will not mention the brand since they want to find a solution too and are cooperative.

My house SolarFrontier (other brand)  is clean.
This low QRM environment changed last year
With the 4el it is about 20dB noise at front  still about 6dB at the back
If the solar PV/converter   +  optimizer finally shuts down after sunset
the noise almost zero in the free directions just increasing if antenna is connected
In urban direction south is some 6db increase  distance 5-10km
That can be heard clearly when the PV-converter finally shuts down


    Band     QSOs     Pts    S-P  Cty  Pt/Q
    28           73         292    5     34   4.0
 Total          73         292    5     34   4.0
Score: 11,388
1 Mult = 1.9 Q's

 SF 73  

no Asia very few  Rusia  east was almost closed
3 Africa  ( of 6 possible)
just before band closing nowadays  very rare  USA workable

28016 CW 2016-12-11 1708 PA0O              AA1JD           599 MA      MA     4
28039 CW 2016-12-11 1715 PA0O               W4ML          599 VA       VA     4
28043 CW 2016-12-11 1716 PA0O               KA4RRU      599 VA              4
28055 CW 2016-12-11 1716 PA0O               K1VSJ          599 RI       RI     4
28027 CW 2016-12-11 1729 PA0O               K4BAI          599 GA       GA     4
28034 CW 2016-12-11 1741 PA0O              N4YDU         599 NC       NC     4

Comments

PE4BAS, Bas said…
Goed gedaan Jaap. Kan je zien dat CW het echt veel beter doet. En een goede antenne die hoog staat natuurlijk. 73, Bas
December 11, 2016 at 8:42 PM
Post a Comment

Archive

Show more

Popular posts from this blog

2011-01-22 DIAMOND 2m 70cm 1m30 Colinear inside

Having relative poor signals on the local 70cm / 2m channels using this X50 Diamond collinear 70/2  1m 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. My antenna uses SO239 connector UHF type semi air spaced isolator.  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 n...
8 comments
Read more

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 adjuste...
11 comments
Read more

TS790 cat interface

A CAT interface  for the old TS790 144/432/1292 tranceiver to work with N1MM  including the internal CW keyer DTR and "PTT" RTS and WSJT MSHV with "PTT" control Using the 3€ FTDI USB serial interface picture bottom page first i bought the Kenwood USB serial interface cable that cable has the TS790 special 6 pin DIN plug this interface works well ...as long as you cut the 4-5  wire bridge on the ACC din.. with the wire bridge it did go offline after 30 seconds or so  Kenwood interface cable with CH330 eBay 15€    This type Kenwood interface cable uses a tiny 6 pin USB CH330 chip  The driver is CH340 known for Arduino it workes in W7/10 64  It has only TX RX Usart function no DTR RTS available  The TS790 settings are 4800b 8bit data 2 stop  default  N1MM does not list the TS790 it has the TS890  but that one does not support modes the TS2000 does support freq and modes and let you switch 2/70/23 it seem...
4 comments
Read more