VK Logger Ham Radio Forum Archive

Hi Peter,

Thank-you for the update. I noticed the absence of the 2m beacon a few days ago when I was trying to do some receiver checks.

Hopefully the technical issues aren't too complicated and can be resolved fairly easily.

73,

Rod VK4VU

Hi Peter, Certainly there are some peaks and troughs in that plot. I think the key thing to notice though is that around 2400 the plot is basically hitting the noise floor of the measurement system (almost 'flat-lining'), whereas if you look closely in the troughs around say 2402.2 and again at arou...

I'd have to agree that adopting 2400.xx work terrestrial weak signal work makes a lot of sense. As VK5ZD rightly points out, the only amateur satellite that is currently using the band is QO-100 and unfortunately, the footprint doesn't cover Australia. Whilst its good to have sensible domestic band ...

Hi Scott,

I plan to be on 23cm (1296.1 MHz SSB) this evening from home (QG62LO) with 150w > 2 x 19 el yagis. I'll have the VKLogger running.

73

Rod VK4VU

I've now got my 23cm equipment running using a G4DDK Anglian 2m intermediate transverter into a 28 MHz IF transceiver. I also expect to be operational on 23cm only from about 10:00z tonight from my home location (QG62LO). I'll have VKLOGGER running, as well as using an SDR for band monitoring. 73 Ro...

Hi Hayden, I've just realised that you have a parallel thread going on ahrdf.net, so I thought it sensible to post the same information here in case anyone else is interested. Nothing like reaching a wider audience :) Coincidentally this exact topic has very recently been discussed on the WA1MBA Mic...

Hi Jayson,

Most of the answers can be found in the information published by Paul W1GHZ (ex N1BWT)

http://www.qsl.net/n1bwt/chap6-2.pdf

It looks like the phase center (centre ?) is around 0.25 - 0.27 wavelengths behind the active element of the feed.

Hope this helps.

Regards,

Rod VK4VU

Hi Len, Great to hear another new station on 23cm SSB. For the record I'm also using one of the SG-LAB transverters. Currently mine is driving a Mitsubishi RA18H1213 module to about 15w out. I have a reasonably good shot to the north from my location in the NW suburbs of Brisbane, and am looking for...

Hi,

I also plan to be active on 23cm SSB only from my home station (QG62LO) on Sunday with 70w into 2 x37el DL6WU @ 16m.

I'll have the VKLOGGER / iCHAT running.

I'm looking forward to making a few new contacts on the day.

73

Rod VK4VU

Hi Roger, Thanks for pointing out that the NBN will be licenced under a PMTS B licence. I've since realized that my original posting (now edited) was incorrect and that the lower limits (more stringent OOB mask) which I referred to apply to a special case. If I'm reading things correctly, the genera...

Hi, Edited posting follows > I can understand the logic behind wishing to adopt a small frequency offset (2 MHz) and operate just above 3398 MHz, but I think we also must consider the out-of-band emissions from any future spectrum licensed transmitter. It's likely that the emission mask for these tr...

Hi, Thanks for the replies. In the meantime, I have also found an article by Roger G8CUB in the January 2014 edition of the UK Microeave Group's 'Scatterpoint' newsletter ) http://www.scatterpoint.org/ This happens to be the same unit that Graham VK3XDK modified (EDUP Model EP-AB003). G8CUB measured...

Hi, I'm interested in knowing if anyone has tried using a WLAN 'booster' amplifier as a linear amplifier in a 2.4 GHz SSB transverter. My understanding is that the coding schemes needed for higher data rates use 16-QAM and 64-QAM modulation which should mean that high linearity is required. On this ...

My comment that ..... Looks like it could be fairly quiet though ...... turned out to be quite accurate. Thanks to Grant VK2MAX for the JT65 test. Tones were clearly audible every Tx period at this location, but at this stage I'm not set up for operation using digital modes. 73 Rod VK4VU Locator: QG...

I also plan to be on 1296.1 from 8:00 pm this evening.

Looks like it could be fairly quiet though.

See you then

Rod VK4VU

Hi, I realise that this is rather late notice, but the UK Microwave Group Martlesham Roundtable is on this weekend, and is streaming via the BATC http://www.batc.tv/ch_live.php I just found it a few minutes ago - and it looks like there have been some technical hitches. In any case, I imagine that i...

Hi Jayson, I also have one of these on the way. I must admit they look to be very well designed and assembled from what I can see. Incidentally, I inquired about a small change to the PLL programming to allow 1152 or 1151 MHz to be selected as the LO (rather than 1152/1150 MHz), since I wanted to us...

Adam,

That's very interesting regarding the SSPA from DL2AM. I presume that this one can be driven directly from the Kuhne 10G transverter ?
Did you happen to ask the price of the higher power (24w) units at all >

73

Rod VK4KZR

Adam, There is yet another source of 10 GHz amplifiers in Germany. DL2AM http://www.dl2am.de/pa1d.htm has a number of products available. It appears that the highest power 10 GHz amplifier generates 24 watts. There is no pricing information on the web-page however. Readers of DUBUS magazine would be...

Wayne / Graham, At the risk of dragging this thread a little further off topic.... Your flexiverter sounds like a perfect match for one of my PLL boards That's exactly what I'm trying to put together at the moment. I am also experimenting with a 2.4 / 3.4 GHz diplexer to route the signals to/from th...