Posts

Showing posts from December, 2017

last day of 2017 50MHz

Image

50MHz FT8 28 December

Image
LOTW
Sorted by QSO Date (0.018764 seconds elapsed) NextCall signWorkedDate/TimeBandModeFreqQSLDetailsPA0OK5CD2017-12-29 01:08:1580MFT83.57355DetailsPA0OUN7DAT2017-12-29 01:01:0060MFT85.35762DetailsPA0OMM0HVU2017-12-28 08:07:4580MFT83.57346SCOTLANDDetailsPA0OPZ5RA2017-12-28 07:33:30160MFT81.84056DetailsPA0O3D2TS2017-12-28 07:13:0030MFT810.13769

60m C93PA merry DX-MAS

Image
PA5X  Johannes C93PA Mozambique  op 60m in FT8 mode  met grote pile up

strong  0  to -4

https://dx-world.net/c93pa-mozambique/


Image
21/28 MHz back to 1 element dipole. Only receiving wind lately

wspr challenge

Image
The Beverages bring me in the WSPT Challenge top 10  for 160 and 80
But not even in 600m  list no matter how often and "strong" WA4SZE and AA1A  are received.




TimestampCallMHzSNRDriftGridPwrReporterRGridkmaz 2017-12-24 04:28  W4BCX  0.475686  -28  0  EL98pd  5  PA0O  JO33hg  7368  41  2017-12-24 02:50  WA4SZE  0.475653  -31  0  EM65  0.2  PA0O  JO33hg  7147  41  2017-12-24 03:58  AA1A  0.475687  -22  0  FN42pb  5  PA0O  JO33hg  5630  49
TimestampCallMHzSNRDriftGridPwrReporterRGridkmaz 2017-12-24 00:20  W9MJW  1.838122  -17  0  EN60ea  5  PA0O  JO33hg  6807  43  2017-12-24 00:24  K9PAW  1.838191  -27  0  EN61ar  1  PA0O  JO33hg  6688  43  2017-12-24 01:04  K9YWO  1.838181  -25  0  EN61fn  1  PA0O  JO33hg  6677  44  2017-12-24 01:10  N3CO  1.838098  -23  0  EN72et  5  PA0O  JO33hg  6468  45  2017-12-23 23:10  N2HMM  1.838131  -28  0  FN21sf  5  PA0O  JO33hg  5924  47  2017-12-24 04:40  VE3LC  1.838044  -25  0  FN25fk  5  PA0O  JO33hg  5680  50  2017-12-24 04:20  WA9WTK  1.83806…

TS472 microphone preamp versus MAX9812

Image
MAX9814  seems the best choice  it has AGC and jumpers for gain setting to max 60dB
 will test this one to when arrived. 


Received this low noise ST TS472  pre-amp  Diymore from eBay. Main while the 3 transistor pre-amp with AVR earlier down in the blog works fine. This TS472 IC is special designed for microphones  electret or magnetic and i was curious to find out how such integrated device performs. With the magnetic  200 OHm Peiker element the signal is fine although not as sensitive as with an electret element. The maximum un-clipped output is about 2Vtt. It did not match the low impedance mike input of the Condor as it is at first test. Minimum drive load is 10k.  An emitter or source driver is needed behind the TS472 and  low impedance tranceivers like the Condor.  No documentation is supplied with it but the PCB looks similar to the  ST  demo board TS472 PCB  well designed.   The standby pad must be +    ,  minus = gnd  will switch to standby. Left floating wil drift it uncontro…

80M DX

Image
matige propagatie maar toch FT8 VP8LP Britse kolonie en TasmaniĆ« WSPR HAMLOG.EU  http://www.hamlog.eu                                                                   HAMLOG.EU



No.Date UTCBandCallsignQTHOperatorModeRSTs1.2017-12-1800:1180 m VP8LPFT8-152.2017-12-1718:1480 m VK7DIK- Ulverstone,Tasmania [ Australia ]DickWSPR-183.2017-12-1606:39160 m IS0GFTFT8-114.2017-12-1606:34160 m F4HQLFT8+105.2017-12-1606:19160 m XE1HFT8-166.2017-12-1600:1980 m PZ5RAFT8-177.2017-12-1508:1480 m KG6MCFT8-158.2017-12-14

wspr MW 474.2kHz

after removing about 50%!  bogus decodes of 100 this list of unique decodes  last 12hour remains


  2017-12-17 06:36  K9FD  0.475618  -26  0  BL11je  1  ZF1EJ  EK99ig  7842  76
 2017-12-17 06:52  K9FD  0.475617  -23  0  BL11je  1  W3LPL  FM19lg  7716  55
 2017-12-17 06:36  K9FD  0.475617  -32  0  BL11je  1  W4VU  FM06fb  7567  58
  2017-12-17 06:36  K9FD  0.475620  -33  0  BL11je  1  WA3TTS  EN90xn  7439  54
 2017-12-17 07:08  K9FD  0.475616  -25  0  BL11je  1  NO3M  EN91wr  7413  52
 2017-12-17 07:08  K9FD  0.475619  -29  0  BL11je  1  K4LY  EM85wb  7357  60
 2017-12-17 06:34  K4SV  0.475601  -32  -1  EM85wf  5  K9FD  BL11je  7354  280
 2017-12-17 06:36  K9FD  0.475618  -19  0  BL11je  1  WB0IQK  EN90dw  7294  53
 2017-12-17 07:14  K9FD  0.475617  -28  0  BL11je  1  W8ARE  EN80nd  7207  54
 2017-12-17 07:08  K9FD  0.475619  -30  0  BL11je  1  K8RZ  EM84aj  7205  61
 2017-12-17 06:36  K9FD  0.475617  -25  0  BL11je  1  KU4XR  EM75xr  7174  59
 2017-12-17 02:06  WA4SZE  0.475653  -27  …

FT8

Image
This morning XE1H  1840kHz  the FT8 USB dial frequency  peaking -7dB

QRM by a ham that called  XE1H simplex wrong sequence s9+ while my QSO was not yet finished
no problem to call overlapping a pending QSO with FT8 if not simplex offset and in the correct sequence.


everyone can make mistakes
But it is important to take notice of the excellent must read FT8 operation tips:
http://yorkradioclub.org/wp-content/uploads/2017/10/FT8-Operating-Tips.pdf
also later 80m longpath to ZL1RJ  heard 

Must be over S.A.  longpath  but wspr and others alway show and calculate the shorth path

PSK reporter is nice but not all reported is correct or complete

f.i. XE1H  was reported 80m  not 160m where I had 2-way exchange in FT8



I forgot last night to set the Flex1500 to 474.2kHz



purchased  IRFP450A  eBay  do not look 100% genuine
hard to believe Fairchild does sell rusty devices
It is too much become a gamble  to purchase semiconductors at eBay