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[195.171.43.25]) by mx.google.com with ESMTP id s5si650730wjs.169.1969.12.31.16.00.00; Sat, 17 Aug 2013 06:19:22 -0700 (PDT) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1VAfu5-0006hZ-PF for rs_out_1@blacksheep.org; Sat, 17 Aug 2013 13:46:49 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1VAfu5-0006hQ-1j for rsgb_lf_group@blacksheep.org; Sat, 17 Aug 2013 13:46:49 +0100 Received: from rhcavuit01.kulnet.kuleuven.be ([134.58.240.129] helo=cavuit01.kulnet.kuleuven.be) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1VAfu1-0001gp-5Q for rsgb_lf_group@blacksheep.org; Sat, 17 Aug 2013 13:46:47 +0100 X-KULeuven-Envelope-From: rik.strobbe@fys.kuleuven.be X-KULeuven-Scanned: Found to be clean X-KULeuven-ID: 023C013809C.A6715 X-KULeuven-Information: Katholieke Universiteit Leuven Received: from icts-p-smtps-2.cc.kuleuven.be (icts-p-smtps-2e.kulnet.kuleuven.be [134.58.240.34]) by cavuit01.kulnet.kuleuven.be (Postfix) with ESMTP id 023C013809C for ; Sat, 17 Aug 2013 14:46:43 +0200 (CEST) Received: from ICTS-S-HUB3.luna.kuleuven.be (icts-s-hub3.luna.kuleuven.be [10.112.9.17]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by icts-p-smtps-2.cc.kuleuven.be (Postfix) with ESMTPS id E641820049 for ; Sat, 17 Aug 2013 14:46:42 +0200 (CEST) Received: from ICTS-S-MBX5.luna.kuleuven.be ([fe80::312b:f3bc:9c4:4ebb]) by ICTS-S-HUB3.luna.kuleuven.be ([fe80::a470:76b3:406d:2b1a%27]) with mapi id 14.02.0328.009; Sat, 17 Aug 2013 14:46:42 +0200 X-Kuleuven: This mail passed the K.U.Leuven mailcluster From: Rik Strobbe To: "rsgb_lf_group@blacksheep.org" Thread-Topic: LF: Belgium on 472 kHz Thread-Index: AQHOmQpRfZGHer1a0katMPirWB4xwZmU1ISAgABmczOAA+vUAIAAM1Yo Date: Sat, 17 Aug 2013 12:46:42 +0000 Message-ID: <7E7DFBB4D102A04DB5ADC88D66628A4A0FC1E9F5@ICTS-S-MBX5.luna.kuleuven.be> References: <7E7DFBB4D102A04DB5ADC88D66628A4A0FC1DC8E@ICTS-S-MBX5.luna.kuleuven.be>,<520BBEDD.1090004@iup.uni-heidelberg.de> <7E7DFBB4D102A04DB5ADC88D66628A4A0FC1DCF7@ICTS-S-MBX5.luna.kuleuven.be>,<520F5EE0.50309@iup.uni-heidelberg.de> In-Reply-To: <520F5EE0.50309@iup.uni-heidelberg.de> Accept-Language: nl-BE, en-US Content-Language: nl-BE X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.112.13.11] MIME-Version: 1.0 X-HELO-Warning: Remote host 134.58.240.129 (rhcavuit01.kulnet.kuleuven.be) used invalid HELO/EHLO cavuit01.kulnet.kuleuven.be - verification failed X-Spam-Score: -3.4 (---) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi Stefan, no special RX antenna here. I do use my "lazy-L antenna" (11m high and 23m long) for TX and RX. But I do use 20 to 40 dB attenuation between antenna and RX to avoid RX overload. The RX is a Kenwood TS440, a rather good RX in regard with IMD. But the attenuator still makes a difference. I think that - on LF en MF - is it good practice to attenuate the antenna signal up to the level where the antenna noise level is about 10dB (or even less) above the RX internal noise level. That way IMD is minimized while one is still sure that no signals are lost. [...] Content analysis details: (-3.4 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [134.58.240.129 listed in list.dnswl.org] -2.7 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: 3f12a6171cff302119f724e64afab799 Subject: RE: LF: Belgium on 472 kHz Content-Type: multipart/alternative; boundary="_000_7E7DFBB4D102A04DB5ADC88D66628A4A0FC1E9F5ICTSSMBX5lunaku_" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE, TO_ADDRESS_EQ_REAL autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Status: O X-Status: X-Keywords: X-UID: 1482 --_000_7E7DFBB4D102A04DB5ADC88D66628A4A0FC1E9F5ICTSSMBX5lunaku_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Stefan, no special RX antenna here. I do use my "lazy-L antenna" (11m high and 23m = long) for TX and RX. But I do use 20 to 40 dB attenuation between antenna and RX to avoid RX ove= rload. The RX is a Kenwood TS440, a rather good RX in regard with IMD. But = the attenuator still makes a difference. I think that - on LF en MF - is it= good practice to attenuate the antenna signal up to the level where the an= tenna noise level is about 10dB (or even less) above the RX internal noise = level. That way IMD is minimized while one is still sure that no signals ar= e lost. But it will only work if you are not a S-meter fetishist ;-) Besides that I live in a rural area, apart from my own house all other "noi= se sources" are at least 70m from the antenna. 73, Rik ON7YD - OR7T ________________________________ Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org= ] namens Stefan Sch=E4fer [Stefan.Schaefer@iup.uni-heidelberg.de] Verzonden: zaterdag 17 augustus 2013 13:30 To: rsgb_lf_group@blacksheep.org Onderwerp: Re: LF: Belgium on 472 kHz Hello Rik, MF, I can see you can receive me at -11 dB SNR in WSPR-2 on 630m at daytime. So= i assume i am weak audible? Distance is 332 km which should be the limit o= f the groundwave. Your RX system must be very good. The SNR is 10...12 dB better than at PI4T= HT although the distance is nearly the same, and both completely over land.= JO20IX looks like countryside compared to JO32KF. That seems to make a sig= nificant difference regarding man made noise. I have the same problems here= :-( Or do you have a super special RX antenna? BTW last night EI0CF reported th= at he's using a beverage RX ant. Nice stuff! I'm still hoping to find the limiting factor for my RX system. Is it the no= n-optimal equipment or simly the location, i.e. can i improve it at this lo= cation or did i already reach the best sensitivity i can get from here. On = MF i think i can't get much better, except by using directional antennas, m= aybe. 73, Stefan/DK7FC Am 14.08.2013 23:42, schrieb Rik Strobbe: Hello Stefan, I hope just some days. Meanwhile I can transmit WSPR, WSJT-X etc... A short WSPR test got me a decode from G3XKR at 630 km. Last winter I got r= eports from up to 2000 km (on 501 kHz) with the same rig. 73, Rik ON7YD - OR7T ________________________________ Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org] namens Stefan Sch=E4fer [Stefan.Schaefer@iup.uni-heidelberg.de= ] Verzonden: woensdag 14 augustus 2013 19:31 To: rsgb_lf_group@blacksheep.org Onderwerp: Re: LF: Belgium on 472 kHz Hi Rik, Good news! I hope to meet you on the band soon when the PA is working again= . How long will it take to repair it? Will you try WSPR during that time, using QRP? Vy 73, Stefan/DK7FC Am 14.08.2013 18:23, schrieb Rik Strobbe: Dear all, from today on Belgian holders of a HAREC licence are allowed to use 472-479= kHz with 5 W EIRP on secondary base. No mode limitations. So far the good news. Bad news is that I started up the TX (after some months of rest) and after = one minute the was a "bang". A short check showed that the PS failed (went = from 15V to 22V). The PS was fixed (15V stabilisator replaced), but the 22V= also destroyed some IC's that are not on the sheft in my shack. I have to = order them and it can take some tome to get QRV with full power (250W). Fortunately I stille have the 6W transverter working, so I can be QRV with = low power (estimated ERP =3D 20 mW) from now on. 73, Rik ON7YD - OR7T --_000_7E7DFBB4D102A04DB5ADC88D66628A4A0FC1E9F5ICTSSMBX5lunaku_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Stefan,

 

no special RX antenna here. I do use my "lazy-L antenna" (11m = high and 23m long) for TX and RX.

But I do use 20 to 40 dB attenuation between antenna and RX to avoid RX = overload. The RX is a Kenwood TS440, a rather good RX in regard with I= MD. But the attenuator still makes a difference. I think that - on LF en MF= - is it good practice to attenuate the antenna signal up to the level where the antenna noise level is about 10dB= (or even less) above the RX internal noise level. That way IMD is minimize= d while one is still sure that no signals are lost.

But it will only work if you are not a S-meter fetishist ;-)

 

Besides that I live in a rural area, apart from my own house all other &= quot;noise sources" are at least 70m from the antenna.

 

73, Rik  ON7YD - OR7T

 

Van: owner-rsgb_lf_group@blacksheep.org [o= wner-rsgb_lf_group@blacksheep.org] namens Stefan Sch=E4fer [Stefan.Schaefer= @iup.uni-heidelberg.de]
Verzonden: zaterdag 17 augustus 2013 13:30
To: rsgb_lf_group@blacksheep.org
Onderwerp: Re: LF: Belgium on 472 kHz

Hello Rik, MF,

I can see you can receive me at -11 dB SNR in WSPR-2 on 630m at daytime. So= i assume i am weak audible? Distance is 332 km which should be the limit o= f the groundwave.
Your RX system must be very good. The SNR is 10...12 dB better than at PI4T= HT although the distance is nearly the same, and both completely over land.= JO20IX looks like countryside compared to JO32KF. That seems to make a sig= nificant difference regarding man made noise. I have the same problems here :-(
Or do you have a super special RX antenna? BTW last night EI0CF reported th= at he's using a beverage RX ant. Nice stuff!

I'm still hoping to find the limiting factor for my RX system. Is it the no= n-optimal equipment or simly the location, i.e. can i improve it at this lo= cation or did i already reach the best sensitivity i can get from here. On = MF i think i can't get much better, except by using directional antennas, maybe.

73, Stefan/DK7FC


Am 14.08.2013 23:42, schrieb Rik Strobbe:

Hello Stefan,

 

I hope just some days. Meanwhile I can transmit WSPR, WSJT-X etc...

A short WSPR test got me a decode from G3XKR at 630 km. Last winter I go= t reports from up to 2000 km (on 501 kHz) with the same rig.

 

73, Rik  ON7YD - OR7T

 

Van: owner-rsgb_lf_group@blacksheep.org [own= er-rsgb_lf_group@blacksheep.org] namens Stefan Sch=E4fer [Stefan.Schaefer@iup.uni-heidelberg.de]
Verzonden: woensdag 14 augustus 2013 19:31
To: rsgb_lf_group@blacksheep.org
Onderwerp: Re: LF: Belgium on 472 kHz

Hi Rik,

Good news! I hope to meet you on the band soon when the PA is working again= . How long will it take to repair it?
Will you try WSPR during that time, using QRP?

Vy 73, Stefan/DK7FC


Am 14.08.2013 18:23, schrieb Rik Strobbe:

Dear all,

 

from today on Belgian holders of a HAREC licence are allowed t= o use 472-479 kHz with 5 W EIRP on secondary base. No mode limitations.

So far the good news.

Bad news is that I started up the TX (after some months of rest) and aft= er one minute the was a "bang". A short check showed that the PS = failed (went from 15V to 22V). The PS was fixed (15V stabilisator replaced)= , but the 22V also destroyed some IC's that are not on the sheft in my shack. I have to order them and it can take som= e tome to get QRV with full power (250W).

Fortunately I stille have the 6W transverter working, so I can be QRV wi= th low power (estimated ERP =3D 20 mW) from now on.

 

73, Rik  ON7YD - OR7T

--_000_7E7DFBB4D102A04DB5ADC88D66628A4A0FC1E9F5ICTSSMBX5lunaku_--