LF: Re: De F6CNI : Testing this evening a short whip on WSPR2 MF.

["F6CNI - Andy - JN19QB" <f6cni@orange.fr>]

Hello Vinny.

 

No top hat, only the vertical wire.

 

Using my normal groung system in the garden : 7 x ground rods, each rod is 2 inches diameter 8 feets aluminium tube. No radials.

 

Andy.

 

From: Vincent Stallbaum

Sent: Sunday, February 14, 2016 12:28 PM

To: rsgb_lf_group@blacksheep.org

Subject: Re: LF: De F6CNI : Testing this evening a short whip on WSPR2 MF.

 

Hi Andy,

my ears will do their very best :)

Are you using any radials or top head?

73 Vinny

Am 14.02.2016 11:37, schrieb F6CNI - Andy - JN19QB:

Hi All.

 

This evening I’ll test on MF WSPR2  a short 5 meters long vertical whip. It is a thin wire inside a telescopic fiberglass fishing pole.

 

Including coil and ground resistances, the base impedance is 54 - 10100 j. The antenna needs about 3.4mH serial coil to tune it.

 

Computed effeciency is – 33 dB. Using 1 Watt output TX for this test, the expected ERP is 0.5 mW and 0.75 mW for the EIRP.

 

Base current is 135 mA and RMS RF voltage is 1350 V.

 

Reports be welcome.

 

73 de Andy.

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