Have built a magnetic antenna for the 80meter band as shown on my homepage .
As the antenna has an excellen high Q (bandwidth aro 9kHz) it shows a sharp dip in S11 return loss.
To integrate the analyzer I removed the battery, supplied 5V through USB and bridged the ON/OFF switch
set in OFF position with an external relais contact.
Found out that the 5V have to be present before switching to ON or closing the relais contacts, otherwise
the unit won*t start at all. It then draws about 110mA of supply current. (An empty batterie would increase
the current to beyond 700mA, that's why I removed the battery)
The instrument setting is fix and saved to SAVE0, so it starts always with this setting.
See the picture.
Anyone having good advices or ideas for this application, or already done something similar?
Great would be an extended marker feature to direct display the frequency of the dip in S11.
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Arno DK3SS
Arno DK3SS
