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 <[email protected]>

Reply-To: <[email protected]>

To: <[email protected]>

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: [email protected]
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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