Re: AW: LF: EbNaut Test tonight

[Riccardo Zoli <riccardozoli80@gmail.com>]

Hi LF

sorry but there is only 2030 and 2130 as valid transmissions. The new 10MHz GPSDO 

hasn't worked properly and I'm trying to fix the problem....

73 de IW4DXW Riccardo

Il Ven 13 Apr 2018, 22:02 Riccardo Zoli <riccardozoli80@gmail.com> ha scritto:

Hi Joe, Jay, Marco.......LF

I have scheduled some transmissions from 2030 to 0630 UTC (Apr. 13/14, start at xx30).

QRG: 137521.0000 Hz

3 char

CRC 18

4 sec/sym

duration 28' 48"

Then: RX in the 1st half hour, TX in the 2nd half hour.

Reports are welcome :-)

GE all

73 de Riccardo IW4DXW

Il Ven 13 Apr 2018, 17:32 Joe <df2jp@gmx.de> ha scritto:

Hi Riccardo,

 

thank you for listening too :o)

I´ll repeat this session tonight, starting 18:00 UT until Sunrise

 

73 Joe

 

Von: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] Im Auftrag von Riccardo Zoli
Gesendet: Freitag, 13. April 2018 17:04
An: LF Group
Betreff: Re: AW: LF: EbNaut Test tonight

 

 

Hi Joe, LF

 

Strong signal in JN64!

Hr the report (UTC: Eb/N0):

 

1800, 1900, 2000, 2100, 2200: NIL (because of a strong local noise)

2300: 5.9

0000: decoded ***** (a carrier about 500 uHz down)

0100: 12.3 *

0200: NIL

0300: 10.5

0400: 9.3

 

*see attachments

 

Last night in RX I used a modified selective voltmeter HP-3746A GPS disciplined (instead my SDR) with 2nd IF (15625 Hz) directly applied on the PC audio. Congrats for your HP 2-ch. synthesized generator that works very well :-)

 

All the best

 

 

73 de Riccardo IW4DXW

 

 

 

 

 

2018-04-13 12:12 GMT+02:00 jrusgrove@comcast.net <jrusgrove@comcast.net>:

Joe

 

Wasn't able to get set up in time for the 0000 and 0100 transmissions ... unfortunately no decodes at 0200 and 0300. Will be ready to go tonight at 2300. Based on receptions a couple weeks back 0000 and 0100 were the best at that point. If any other stations decide to join in please give early notice so I can make sure there are enough bins for all in the 'party' ;~) .

 

Jay W1VD 

 

 

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

From: Joe <df2jp@gmx.de>

Reply-To: <rsgb_lf_group@blacksheep.org>

To: <rsgb_lf_group@blacksheep.org>

Sent: 4/13/2018 4:32:03 AM

Subject: AW: LF: EbNaut Test tonight

---

Hi Domenico, Stefan,

 

thank you for the reports.

I had problems with the RX/TX switch during the transmission at 23:00 UT and 00:00 UT.

Since the generator has no PTT of course, I have to divert the generator signal after the transmission into a dummy load otherwise the PA runs all night in "Key-Down" mode. Since I couldn't think of anything better, I used a virtual machine under XP. There runs parallel to the EbNaut-TX a WSJT-X 0.95 (the last version with the slow JT-9 modes) in JT9-30. This JT9-30 controls my coax relay via RS232 and separates the generator from the PA... adventurous ;o)

Unfortunately this old WSJT-X crashed from time to time, so again last night. At 01:30 local time I had to bridge the coax relay for the transmissions to continue.

 

The TX chain here looks like this:

 

Generator: HP3326A with GPSDO

Interface to K3RWR in which the phase is switched with a relay-controlled bias voltage.

PA: Hafler 9505 with 200W out = 0.2W ERP

 

I will extend the test until the weekend, Sunday is over and the antenna will be dismantled. We had heavy thunderstorms the day before yesterday and after last summer's lightning strike I don't take any more risks :o)

 

73 Joe

 

 

Von: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] Im Auftrag von DK7FC
Gesendet: Donnerstag, 12. April 2018 21:19
An: rsgb_lf_group@blacksheep.org
Betreff: Re: LF: EbNaut Test tonight

 

Hi Joe,

Good copy here as well.

73, Stefan

Am 12.04.2018 17:49, schrieb Joe:

Hey  guys,

 

I will start my first serious EbNaut transmission tonight, the 3326A is now GPSDO supported,  the drift is fixed.

Markus, DF6NM decoded me last night with qrppp.

So I'll be TX´in every full hour:

 

*f = 137524.5000 Hz

Start time: 12.APR.2018  18:00:00 UTC (at hourly intervals)

Symbol period: 3 s

Characters: 5

CRC bits: 16

Coding 8K19A

Duration: 25:36 min

Abt. 0.2 W ERP

 

Reports are welcome.

 

73 Joe

 

 

 

 

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