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Re: LF: F6CNI to night testing a tuned loop TX on MF

To: "[email protected]" <[email protected]>
Subject: Re: LF: F6CNI to night testing a tuned loop TX on MF
From: "IZ7PDX Luigi D." <[email protected]>
Date: Mon, 27 Jul 2015 16:14:16 +0200
In-reply-to: <[email protected]>
References: <44F6B31AAFEB4E9BA366603718394B73@PCD> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Hello Om, IZ7PDX station will come back very soon on MF and LF band ...
73 to all.
Luigi

Inviato da iPhone

Il giorno 27/lug/2015, alle ore 15:56, IZ7SLZ <[email protected]> ha scritto:

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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