Mal!
I and all others who actually are TXing on VLF, put a lot of work and
effort in this project. We are constantly improving our setup.
In addition we even have the chance now to observe propagation effects
on VLF because some of us managed to transmit at least a detectable
signal with their ground-antennas.
"Detectable" must not mean that this signal is good enough for a QSO
but of course, it's the goal. Even the weakest signal as long as
detected somewhere isn't "useless" in my opinion.
To QRO is a fine thing but on VLF with the extremely high voltages also
dangerous. So before I QRO and take the risk of a damaged loading coil,
I would try other things first.
73
OE3GHB
Gerhard
Am Samstag, den 26.02.2011, 18:35 +0000 schrieb mal hamilton:
> Markus
> If you can only produce a dot or a less and no ID then it is time to
> QRO so that your transmission can be seen properly.
> Do not depend on an ID based on Frequency accuracy, it leads to
> gueswork.
> And long slow transmissions with QSB is a waste of time and
> meaningless, ie broken up dashes and impossible to ID
> This has all been discussed before and concluded that slow prolonged
> dases/transmissions are useless.
> With some effort and suitable power short sharp transmissions are
> preferable.
> It seems to me in recent times we are covering the same old ground and
> making little or no headway.
> So far I have heard/seen ONE German and one Austrian stn on VLF,
> where are all the others that were so keen to TX.
>
> G3KEV
>
>
> ----- Original Message -----
> From: Markus Vester
> To: [email protected]
> Sent: Saturday, February 26, 2011 12:06 PM
> Subject: Re: LF: HE3OM in JA
>
>
> Congratulations to Kuni and Toni, and thanks Mike for sorting
> out the relevant screenshots.
>
> Yes faster modes may give a powerful station a better chance
> to get a complete message across. Already on Monday evening,
> dots from HE3OM have definitely been identified on the JA7NI
> grabber while it was running in 84 mHz "QRSS-10" resolution.
>
> But for the likes of ourselves who are able to produce a
> marginal SNR at best, I think the only option is trying to
> produce a few traces at 90 seconds or slower modes.
>
> Best regards, and good luck to all,
>
> Markus (DF6NM)
>
>
>
> From: Mike Dennison
> Sent: Saturday, February 26, 2011 11:30 AM
> To: [email protected]
> Subject: LF: HE3OM in JA
>
>
> Last night HE3OM put a good signal into JA7NI's grabber at JA
> dawn..
> UA4WPF can also be seen, but much weaker than previously. See
> attached.
>
> Also attached is the same time on RN3AGC's grabber which shows
> that
> DF6NM and myself were also calling, but we could not compete
> with
> HE3OM's ERP which I estimate as 15-20dB up on us.
>
> The JA picture also supports my theory that QRS120 is not a
> practical
> speed for real DX. There are long periods where the signal is
> well
> above the noise, but QSB prevents the whole callsign being
> received.
> At that strength, QRS30 would probably have still been viable
> and
> allowed a couple of full calls to be read.
>
> Congratulations to HE3OM on what may be an amateur world
> record on
> 136, though with an estimated ERP much bigger than most
> amateurs have
> available.
>
> Mike, G3XDV
> ==========
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