Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

VLF: Transmit hardware

To: <[email protected]>
Subject: VLF: Transmit hardware
From: "Markus Vester" <[email protected]>
Date: Sat, 9 Oct 2010 20:48:01 +0200
In-reply-to: <DA3FE8DC90364FAEAD453F23D12C92A2@Black>
References: <B24E1624B36348E1982ADE31636A198C@Black> <114D6EDF6AF54DF0A20FCDED840DDDAE@Black> <[email protected]> <DA3FE8DC90364FAEAD453F23D12C92A2@Black>
Reply-to: [email protected]
Sender: [email protected]
BTW Attached are a few small pictures of the transmit gear. 73, Markus
 
----- Original Message -----
Sent: Saturday, October 09, 2010 8:09 PM
Subject: Re: LF: Re: Transmitting on 8969.998 Hz

Thanks a lot Stefan for this nice confirmation! I'm quite amazed that it did work so well. And congratulations to you - as they say, with QRP all the hard work is being done on the receiving side! And I recall our conversation not long ago, when the two of us half-jokingly calculated that we could probably work each other at one bit a day ;-)
 
The amazing thing is that virtually everybody can do this. For transmitting, all you need is an average LF backyard marconi, or a strapped 80 m dipole with reasonable insulation. We actually live on a fairly small plot, and I have 42 m of wire up at about 7m effective height. A power of 80 W gives around 0.28 A (ie. 21 kV antenna voltage). Thanks to Spectrum Lab, accurate GPS or MSK stabilisation has become almost straightforward.
 
I have stopped the transmitter now at 18:00, as I do not dare to let it run through the night. If conditions allow, I will try to add another dash tomorrow ;-)
 
Best regards,
Markus (DF6NM)
 

Attachment: VLF_ferrite_tuner.jpg
Description: JPEG image

Attachment: VLF_amp_and_transformer.jpg
Description: JPEG image

Attachment: VLF_coil_and_antenna.jpg
Description: JPEG image

<Prev in Thread] Current Thread [Next in Thread>