Hi Ha-Jo yes I forgot about the power-feed choke :-))
Alan


--- On Mon, 1/3/10, [email protected] 
<[email protected]> wrote:

> From: [email protected] <[email protected]>
> Subject: Re: LF: 9kHz/Mini Whip
> To: [email protected]
> Date: Monday, 1 March, 2010, 0:37
> I would also recommend to increase
> the inductance of the 470uH power
> feed choke. I have built similar active aerials using
> operational
> amplifiers
> like OP27 or LT1252 (just 4 to 10 mA current consumption,
> so my choke
> is
> 10mH) and can receive the russian Alpha signals down to
> 11.9 kHz in
> southern Germany
> without problems (unless there are switched off, as it
> happens from time
> to time). 
> 
> 73 Ha-Jo, DJ1ZB
> 
> 
> "ALAN MELIA" <[email protected]>
> schrieb:
> > Yes Laurence KL1X modified the circuit for use from
> 10kHz. I think it needs some of the coupling caps increased
> in value. Alan G3NYK
> 
> >On Sun, 28/2/10, Ken <[email protected]>
> wrote:
> 
> > From: Ken >[email protected]>
> > Subject: LF: 9kHz/Mini Whip
> > To: >[email protected]
> > Date: Sunday, 28 February, 2010, 20:17
> >Hi All. 
> >Has anyone had any experience using the PA0RDT Mini
> Whip on 9kHz? 
> >73s Ken 
> > M0KHW
> 
> 
>