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AW: LF: ref LD30

To: <[email protected]>
Subject: AW: LF: ref LD30
From: Stefan Schäfer <[email protected]>
Date: Sat, 15 May 2010 22:45:36 +0200
References: <002701caf394$44cbd980$0401a8c0@xphd97xgq27nyf> <[email protected]> <[email protected]> <001101caf42a$e6d987e0$0401a8c0@xphd97xgq27nyf>
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Thread-index: Acr0K1wbyANUfadxSzKQ2s5PRSiAzwARDZF9
Thread-topic: LF: ref LD30
Mal, 
 
That's fine! So you could use 1mm diameter enamelled wire for minimal losses. 
Also the HV will be rather smaller. Sounds promising...
 
73, GL
 
Stefan/DK7FC

 
________________________________

Von: [email protected] im Auftrag von mal hamilton
Gesendet: Sa 15.05.2010 14:34
An: [email protected]
Betreff: Re: LF: ref LD30


Stefan
My Loading coil inductance at 137 is around 0.5mH therefore at 9 kHz it should 
be roughly 116 mH. Not such a big coil in my case.
Tnx info de Mal/g3kev
 

    ----- Original Message ----- 
    From: Stefan Schäfer <mailto:[email protected]>  
    To: [email protected] 
    Sent: Saturday, May 15, 2010 1:07 PM
    Subject: Re: LF: ref LD30

    ...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
             
             
             

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