Mal and group!
"A couple of Hz"....is way too much off for seriously transmitting on
VLF at low speeds. And low speeds are mostly required to detect the
signal. A drift of 100mHz is the minimum requirement for transmitting on
VLF, except you produce an outstanding strong signal at the site of
reception.
Generating the TX-frequency by SpecLab while locking at the same time
either to GPS (via 10kHz tone) or a stable VLF transmitter like DHO38 or
GQD enables you to keep the drift within 1mHz or even lower.
SO 954µHz/bin (for QRSS3000) or half of it for 6000 is a proper
resolution for receiving VLF.
73
OE3GHB
Gerhard
Am Dienstag, den 08.03.2011, 15:43 +0000 schrieb mal hamilton:
> Gary es Co
> Apart from antennas etc anyone a couple of hz off frequency will not
> be seen, and like I said what I have seen so far are not that stable
> The aim surely on 9 kcs is to generate a reasonable erp that can be
> copied at say QRS 60 or faster.
> g3kev
>
> ----- Original Message -----
> From: Gary - G4WGT
> To: [email protected]
> Sent: Tuesday, March 08, 2011 3:12 PM
> Subject: Re: LF: 8.970.025Khz
>
>
> Hi Mal,
>
>
> I believe I would as well if I had the antenna's you have but
> they won't fit in my small garden.
>
>
> Cheers, Gary - G4WGT.
>
>
>
> On 8 March 2011 14:42, mal hamilton <[email protected]>
> wrote:
> That is why they see nothing except local signals. I
> copied OE5ODL and DK7FC in QRS3.
> mal/vg3kev
>
>
> ----- Original Message -----
> From: Gary - G4WGT
> To: [email protected]
>
> Sent: Tuesday, March 08, 2011 2:22 PM
> Subject: Re: LF: 8.970.025Khz
>
>
> Hi Mal,
>
>
> Most others are monitoring using half my
> bandwidth ie.Width of one FFT-bin: 423 uHz ,
> mine is 954 uHz.
>
>
> Cheers, Gary - G4WGT.
>
>
> On 8 March 2011 14:04, mal hamilton
> <[email protected]> wrote:
> Gary
> Except a signal is extremely stable
> your bandwidth is too narrow. Most I
> have observed so far are not stable.
> mal/g3kev
>
> ----- Original Message -----
> From: Gary - G4WGT
> To:
> [email protected]
>
> Sent: Tuesday, March 08, 2011
> 12:07 PM
> Subject: Re: LF: 8.970.025Khz
>
>
> Hi All,
>
>
> 9kHz grabber back on, loop
> beamed ESE (approx 110 deg)
> from IO83qo. M0BMU pre-amp
> with 7kHz to 10kHz filter.
>
>
>
> http://dl.dropbox.com/u/15990181/9khz.jpg
>
>
> 73, Gary - G4WGT.
>
> On 8 March 2011 09:27, henny
> van elst <[email protected]>
> wrote:
> Tu Roger,
>
> the tx is still on
> henny pa3cpm
> 73's
> ----- Original
> Message -----
> From: Roger
> Lapthorn
> To:
>
> [email protected]
> Sent: Tuesday,
> March 08, 2011
> 9:35 AM
> Subject: Re:
> LF:
> 8.970.025Khz
>
>
>
> Henny
>
>
> Monitoring
> overnight in
> 423uHz BW
> resulted in no
> copy of your
> signal I am
> afraid.
>
>
> 73s
> Roger G3XBM
>
> Via my 2.4GHz
> handheld (iPod
> Touch 4g)
>
> On 7 Mar 2011,
> at 21:47,
> "henny van
> elst"
> <[email protected]> wrote:
>
>
>
> > Hi LF,
> > The tx is
> > on,
> >
> > freq.8.970.025Khz
> > antenne
> > curent
> > 200mA,
> > Henny pa3cpm
> > 73's
>
> ______________
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> uitgifte:
> 03/07/11
>
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>
>
>
>
>
>
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