Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: ref LD30

To: [email protected]
Subject: Re: LF: ref LD30
From: Stefan Schäfer <[email protected]>
Date: Sat, 15 May 2010 14:07:17 +0200
In-reply-to: <[email protected]>
References: <002701caf394$44cbd980$0401a8c0@xphd97xgq27nyf> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
User-agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3
...means L(9kHz) = L(137kHz)*232




Am 15.05.2010 13:52, schrieb Stefan Schäfer:
Mal,

I assume you know your antenna capacitance so you can easily calculate your needed inductance. Or, if you know your L for 137kHz, it will be about (137/9)^2 at 9 kHz!

Stefan/DK7FC


Am 14.05.2010 20:35, schrieb mal hamilton:
    Well, I am getting 15v sine wave into a 50 ohm DL with the LD30, this looks promising. All I need now is a 500W audio amp suitably matched into 50 ohms.
I prefer to keep a standard 50 ohm system for measuring purposesd.
or
I could change the 15v to sq wave and build a class D fet amp, maybe a better approach.
If I proceed the Ant system would consist of 3 x inv L antennas in parallel, height about 100 ft and each one about 500 ft horizontal.
Will have to calculate the loading coil L maybe less than 1 H with some luck
This is just a proposal at present
de mal/g3kev
 
 
 
<Prev in Thread] Current Thread [Next in Thread>