Moon-net June 2017

moon-net@mailman.pe1itr.com

112 participants
126 discussions

by serge

Hello friends for the few EME folks who need an HF QSL to confirm FS7 please send me your QSL & SAE W6TCP kindly got me some QSL printed. He looks after the bulk of HF contacts as well. Thanks Serge VE1KG

6 years

Fwd: Re: [Linrad] R: Re: HA1YA Dual converter and Afedri SDR

by Joe Taylor

Hi Leif, Ermanno, Roger, and all, I do not have an Afedri receiver, so can offer no useful comment on its performance. But I have used the WSE receivers with (unmodified) Delta-44 for some 13 years, and I consider the system performance to be extremely good. There are plenty of strong signals in my area, both in and outside but near the 2-meter band. I have never had overload or any other dynamic-range problems. As for Ermanno's reported case(s?) where Javornik/Afedri/Linrad/MAP65 decoded signals that WSE/Delta44/Linrad/MAP65 failed to decode: Yes, frequency stability is important for decoding the weakest JT65 signals. I have not had problems with the WSE receiver in this regard, perhaps because I never turn mine off unless I am away from home for several days or longer. To reduce heat buildup in the closed WSE boxes, I have inserted wooden spacers between each of the stacked units; and somewhat against Leif's advice, I run mine with power supplies set at +/- 12 V DC instead of the recommended +/- 15 V. No doubt this reduces the dynamic range by a small amount -- perhaps 2 dB? -- but in practice there has been no observable deleterious effect.) Anyway, Ermanno, I believe your screen shots do *NOT* provide evidence that Javornik/Afedri/Linrad/MAP65 has outperformed WSE/Delta44/Linrad/MAP65, at least in this particular case. The entries under "KV" show that all decodes on the Afedri screen were multi-period average decodes. It's impossible to tell from the screen shots exactly how your two setups were configured and used, and multi-sequence averaging in MAP65 is somewhat complicated. However, it's clear that all of these decodes are suspect. The reported "DF" values jump around irregularly: -117, -178, -230, -125, -250, -111, -184 Hz. Moreover, your decodes show DG0JMB calling CQ in both even and odd UTC minutes! Surely the real DG0JMB signal was not frequency-jumping like this, and he was not calling CQ in both sequences. Bottom line: I don't know exactly what was going on in your example. But your WSE/Delta44/Linrad/MAP65 results look perfectly trustworthy, and your Javornik/Afedri/Linrad/MAP65 results certainly do not. -- 73, Joe, K1JT -- There is an excellent Linrad User Guide by Gaetan, ON4KHG, at: http://www.nitehawk.com/w3sz/Linrad%20Installation%20&%20Configuration%20Us… --- You received this message because you are subscribed to the Google Groups "Linrad" group. To unsubscribe from this group and stop receiving emails from it, send an email to linrad+unsubscribe(a)googlegroups.com. To post to this group, send email to linrad(a)googlegroups.com. Visit this group at https://groups.google.com/group/linrad. For more options, visit https://groups.google.com/d/optout.

6 years

Best Tx configuration 2m

by Rod Cunningham

Hi, I am setting up the transmit side of my eme station and on 2 metres will feed 800w into 4 x 7el cross polarised array. I will only operate JT65. I have 3 options- A. Feed all Tx power into just the horizontal antennas, B. Split the Tx Power and feed half into the horizontal and half into the vertical array, C. Introduce a 90deg phase shift and set it up as RHCP. I just need some guidance on the best arrangement. Thanks, Rod (VK5UV)

6 years

2018 3Y0Z Bouvet EME DXpedition

by m.dirksen2 m.dirksen2

Dear om, As you most likely know a good part of the upcoming DXpedition will be spend on 6m and 2m EME. On our EME page ( http://www.bouvetdx.org/eme-bouvet-island/ ) you can find more details on our planned set-ups. Due to the longer journey starting from South America and the high risks involved of getting to and from the island in a hostile environment. Such a DXpedition has to be well equipped to sustain at least 2-3 weeks on the remote inhabitant island. All this is not for free as you would understand. Therefore the team is looking for financial support from the HAM (and in particular) the EME community. Please share this message among radio colleagues and all who are interested. Will you support us making your ATNO possible? Many thanks for your kind assistance and let's hope we meet via the moon! 73e Michael PA5M 3Y0Z Bouvet DXpedition EME focal point

6 years

Re: [Moon-Net] 432 and Above EME Newsletter for June 2071.( 10 GHz DUBUS Dates corrected )

by rein0zn＠ix.netcom.com

Hello All, The corrected 432 MHz and Above EME Newsletter for June 2017 by K2UYH can be downloaded from: http://www.nitehawk.com/rasmit/em70cm.html Enjoy Tnx Al. >73 Rein W6SZ

6 years

The Russian EME Newsletter "EME vestnik" 8-2017

by Alexey Plotnikov

Hello All, The Russian EME Newsletter "EME vestnik" 8-2017 can be downloaded from: http://eme.vhfdx.ru News about S79H, first EME QSO on 50 MHz UB7K-W7GJ, DXpeditions and activity RU-stations (on russian lang). 73, Alex RA4SD

6 years

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Moon-net June 2017