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Hello Andy, all
thanks for the info and for the activity.
I'm at your S-E direction so maybe i have some possibility to
catch your signal. So i will listen in WSPR2 and OP8.
73 and GL
Domenico, iz7slz
On 7/27/2015 3:18 PM, F6CNI - Andy - JN19QB wrote:
Hi to all.
This evening, I’ll transmit to test a single
turn loop on MF.
- 1
Watt HF TX ;
- Mode
WSPR 2 and perhaps also OP 8
- Loop
description :
- Vertical position, top at 11 meters,
bottom at 1 meters over ground ;
- Each side wire is 7 meters long ;
- One single turn copper wire 10 mm
diameter ;
- Maximun lobe NW / SE. Note : at 600 km,
the front / side lobe is about 6 dB ;
- Impedance 0.21 - 113 j ;
- Current wire 2.0 Amperes for 1 Watt
output TX ;
- Top loading using a 3C90 tore isolated
transformer ;
- Base tuning with a variable in parallel
with a fixe capacitor. Total needs around 3000 pF of
total capacitance ;
- 50 Ohms coaxial to the TX ;
- Minimum SWR at TX when the CV is well
tuned : below 1.3 / 1.
Best 73.
Andy. F6CNI
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