Re: LF: TA TONITE

["mal hamilton" <g3kevmal@talktalk.net>]

Radio amateurs do not have suitable calibrated equipment, suitable antennas nor in most cases the expertise to carry out these measurements.

Can you measure my ERP ? and if so what is it ?

From  your statement I assume you are an expert and qualified to make these measurements.

I am frequently on 137.7 and 136.318 I now await your observations.

G3KEV

 

----- Original Message -----

From: Reeves Paul

To: 'rsgb_lf_group@blacksheep.org'

Sent: Wednesday, February 16, 2011 3:24 PM

Subject: RE: LF: TA TONITE

Mal,

 

The reference  ...'especially by Radio Amateurs'  could well be considered offensive and is definitely not borne out by fact. I suppose that the only qualified people would be marine radio officers?

I will not request a retraction - knowing you it would not be forthcoming - but could you be a bit careful with sweeping generalisations in the future?

 

Paul    G8GJA

-----Original Message-----
From: mal hamilton [mailto:g3kevmal@talktalk.net]
Sent: 16 February 2011 15:03
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: TA TONITE

Toni

It is all Guesswork trying to measure ERP some hundreds of miles away. especially by Radio Amateurs.

I have seen figures in the past and after a detailed mathematical analysis the concluded statement was that this could be 6 dB either way, in other words the erp measured could be 1W erp or maybe 4w erp or even worse a lot less.

Let them believe what they like hi

g3kev

 

 

----- Original Message -----

From: HB9ASB

To: rsgb_lf_group@blacksheep.org

Sent: Wednesday, February 16, 2011 1:08 PM

Subject: Re: LF: TA TONITE

Thanks Rik
I've read somewhere that DCF39 has 40kW EIRP. So we would have around 4W EIRP. Last week a station measured our field strength, 100km away and came to 0.4WEIRP. This is probably a little bit to low. Anyway, it shows me again, that most amateurs overestimate their ERP. Even Mal has probably not the Watt he claims ;-)
73 de Toni

2011/2/16 Rik Strobbe <Rik.Strobbe@fys.kuleuven.be>

Hello Toni, group,

 

I measured the HE3OM signal 41dB down on DCF39.

Distances to HE3OM (504km) and DCF39 (515km) are almost identical.

This might give the US stations a clue what signal strength they can expect from HE3OM and what QRSS speed Tony could use to be copied.

 

73, Rik  ON7YD

 

 

---

Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org] namens HB9ASB [hb9asb@gmail.com]
Verzonden: woensdag 16 februari 2011 8:44
Aan: rsgb_lf_group@blacksheep.org
Onderwerp: Re: LF: TA TONITE

Dear Jim, Mal and LF Group

Unfortunately the tower is not nearby my house and I can't leave the station running unattended. And the nights I can spend in Sottens are limited by my health and my wife, hi. So there is no trial before, I have just next Friday night.
If I take a look at the reports we got in the past two weeks from stations 2000-3000km away (always good audible), it should be possible to span 6000km using QRSS10.
On the receiving side, we may be able to see stations let's say with QRSS60. This would mean, that we could make only one or two QSO's. May be it's better to try Crossband: we transmit in QRSS10 and listen on 80m. This would give more stations the opportunity to contact us. However, if there is a station from the East Coast we copy in QRSS10 it would get the priority.
What do you think about this approach?

73 de Toni

2011/2/15 James Moritz <james.moritz@btopenworld.com>

Dear Toni, LF Group,

HE3OM has the advantage of a much stronger TX signal than most Eu stations, so I guess you have a good chance of being copied in NA on Friday night, unless the propagation is very poor. But as you will have seen from the activity last weekend, forward planning is always a good thing, especially where a single QSO takes hours. If possible, I would suggest transmitting some beacon signals from HE3OM between now and Friday, so that North American stations can get a good idea what QRSS speed can be copied from your station. Also, try to receive any W/VE beacons that might be running, so that you also know what the requirement will be in the other direction. Finally, I have usually found reception of US stations is best just before dawn here, so make sure you are not going to be busy on Saturday!

Good luck,

Cheers, Jim Moritz
73 de M0BMU

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