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136kHz receiving noise in WSPR window at nights

Darrin KE9NS did release  P-SDR Version 2.8.0.149  supporting the MCP23017  I/O expander.
Big thanks great job!
Automatic bandpass selecting / hopping now also works for the "XVTR" bands 2200m and 630m.
The Flex1500  needs external Bandfilters for 137 / 475 kHz  i.e. below 482kHz the bandfilter section is bypassed.
2200m and 630m are added as XVTR bands and use the  BNC port XVTX/C for external bandfilters and antenna. in TX the output is about 0dBm over the XVTX/C port
The I2C flexwire is connected to MCP23017 I2C i/o expand band switching

The MCP23017  external slave address lines: A0=A1=1(Vcc) ,  A2=0
Then 474kHz /630m band    GPIO A0=low  A1=high = 3.2V
and 136kHz /2200m band  A0=hi    A1 =low
The GPIO are active high in on state so the circuit can be kept very simple.
Only output A0 is used
To switch the small relays of my dual bandfilter only an TUN o.c. is needed
GPIO A0  active high 3.2V  4k7k at the base of o.c. TUN to select band pass filter 2200m




MCP23017 Ali Exp…
Recent posts

2020 with beam

overnight LF rx
TimestampCallMHzSNRDriftGridPwrReporterRGridkmaz# Spots 2020-01-06 06:58  K3MF  0.137405  -28  0  FM19sr  1  PA0O  JO33hg  6162  46  3  2020-01-05 22:32  N1BUG  0.137438  -24  0  FN55mf  1  PA0O  JO33hg  5297  52  55  2020-01-05 22:52  OE3EMC  0.137433  -26  0  JN78jo  0.001  PA0O  JO33hg  772  315  20  2020-01-05 22:40  G8HUH  0.137450  -23  0  IO81mg  0.1  PA0O  JO33hg  688  67  1  2020-01-06 05:56  F4GUK  0.137456  -27  0  JN18gt  0.2  PA0O  JO33hg  572  28  2  2020-01-05 22:20  DL7NN  0.137440  -2  0  JO60it  1  PA0O  JO33hg  498  306  45  2020-01-05 22:20  G6AVK  0.137570  -20  0  JO01ho  0.05  PA0O  JO33hg  447  63  3


NAC 28MHz ... Boreal Activity Contest

Thursday evening Nordic Activity Contest
NAC 28MHz  or should it be the Boreal Activity Contest (...)
a good test for the Steppir  on a "dead"band

several OH SM signals seen at 28074   ...  in the FT8 window  .. where else ;-)
this time i tried to start WSJT-x  from out N1MM

Normally i start WSJT-x first then N1MM and click away the CAT error popups
N1MM is running the back round
This way WSJT FT8 QSO are also logged in N1MM  general logging data
Provided N1MM   WSJT UDP  setting is checked
 a bit complicated but it works

starting WSJT-x from out N1MM  integrated WSJT-x
gave Rig  Control Error after closing N1MM   WSJT-x  now called   WSJT-x-ForEW1
 runs  i guess i have to modify the configuration to run both simultane


Need to close N1MM  to run now called WSJT-X - ForEW1
Contest mode  config  automatic logging checked
It runs in a new ForEW1 user domain so the existing WSJT is unchanged

the last hour of this test



WSJT-x crashed  when mixing up 2 QSO OH2OT and SM5EPO and PD…

A prosperous 2020 also for the remaining days of 2019

I say that because anything can happen any day , almost the same time last year our cat was killed here nearby.  That was  "only"a cat. Drivers like to step on the gas on small country roads  like here taking a shortcut.





019-12-26 00:42  AA1A  0.475674  -28  0  FN42pb  5  PA0O  JO33hg  5630  49  232019-12-26 03:48  W1IR  0.475739  -24  0  FN34lp  5  PA0O  JO33hg  5587  50  18
2019-12-25 22:50  N1BUG  0.137437  -26  0  FN55mf  1  PA0O  JO33hg  5297  52  3

136kHz 7 days
TimestampCallMHzSNRDriftGridPwrReporterRGridkmaz# Spots 2019-12-29
01:20  K3MF  0.137406  -27  0  FM19sr  1  PA0O  JO33hg  6162  46  7  2019-12-25 22:50  N1BUG  0.137437  -26  0  FN55mf  1  PA0O  JO33hg  5297  52  3  2019-12-22 18:36  UA4AAV  0.137522  -20  0  LO21  1  PA0O  JO33hg  2578  290  41  2019-12-22 22:52  R7NT  0.137540  -24  0  KN97lf  200  PA0O  JO33hg  2372  298  7  2019-12-23 00:30  SV8CS  0.137510  -25  0  KM07js  0.1  PA0O  JO33hg  2038  332  4  2019-12-27 23:00  EA5DOM  0.137532  -19  …