ON8JL D-star Hot-spot work without computer
Monday, 11 October 2010
2m D-Star simplex calling channel on IC-2200H
2m D-Star calling channel (144.6125MHz) on Sunday 10/10/10 from Gillingham in Kent.
Not much happening, even though there's a bit of a lift on 2m.
Not much happening, even though there's a bit of a lift on 2m.
Saturday, 9 October 2010
Comet CHA250 Broadband Vertical
Following my discovery that eHam have pulled my review of the CHA250 (done a couple of years ago and was on the site for a long while) I thought I would make a graphic demonstration of how this antenna compares with an alternative 'restricted space' antenna, the Cobwebb. This video seeks only to present the truth, as seen by the front end of a receiver; the one with the most accurate S-meter available in the amateur radio world...
The Cobwebb is mounted 2 metres higher than the mean height of the CHA250, which in terms of HF is not significant. The CHA250's feeder has 0.3dB less loss than the Cobwebb @ 21 MHz.
The test receiver is a Flex-5000 SDR which has a calibrated S-meter, not AGC derived and is highly accurate, making it the ideal choice for this test. Combined with the identical second receiver, true A/B comparisons are easily accomplished in real time.
A/B tests don't exist for the CHA250 in its previous mounting location however I firmly believe that it performed considerably better at 2.5m AGL than it does at 7m (feedpoint).
The Cobwebb is mounted 2 metres higher than the mean height of the CHA250, which in terms of HF is not significant. The CHA250's feeder has 0.3dB less loss than the Cobwebb @ 21 MHz.
The test receiver is a Flex-5000 SDR which has a calibrated S-meter, not AGC derived and is highly accurate, making it the ideal choice for this test. Combined with the identical second receiver, true A/B comparisons are easily accomplished in real time.
A/B tests don't exist for the CHA250 in its previous mounting location however I firmly believe that it performed considerably better at 2.5m AGL than it does at 7m (feedpoint).
Monday, 27 September 2010
DSTAR and ANALOG Test
K6IRF and W6BMX testing the signal and audio quality of the Dstar compared to an analog.
Tuesday, 14 September 2010
DV Node adjustments
This video was a quick attempt to explain how to set up the NQSM Hotspot from NI2O. I am working on putting a more focused and professional version. Anyone that might help with video editing would sure help the project along.
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