Eddy Jespers

JUNO DSN reception Daily reception of JUNO … maybe no fun anymore 🙈 but it is probably the furthest I can get with my setup … Cassini is no longer there an New Horizons will be a bit to far …

@ibelings Will open one to check if filtering is in IF , RF or both .

@on7un Thanks for checking these. Very interesting results. I would have expected less change in 300 MHz. They might have a filter that has a sharp edge.

Any recommendations on a LNB that will work at 10.4 GHz with a 10 MHz reference on same coax? Ideally WR75

@ibelings Not so good news Peter, I measured two units, INTERNAL PLL ( so not 10 MHz locked ) At 10,7 GHz NF 0,67 dB gain 56,51 dB. At 10,4 GHz NF 7,74 dB gain 19,6 dB . Also checked gain figures on spectrum and it gives the same difference in gain ( and noise floor )

@ibelings Hi Peter, I have a few SMW PLL dual output LNBs here ( LO 10.0 and 9.750 . I will do some gain and noise figure measurements @ 10,4 GHz later today .

@ZhaoFen37759626 This combiner was introduced by HB9BBD. There where several presentations ( Orebro, Dorsten , Tri Studne ) The only presentation I found on line is here : docplayer.net/154377619-10-g… To combine two PA's only adjacent ports are used

Today I got a 10ghz power combiner machined in CNC, but I still don't have a clear idea of how to debug this thing. Just something tells me that branch 2 is minus 3DB, branch 3 is minus 9DB... .

@g4cch I suggest using a hot plate to heat the board to 100°C or so, then SMD soldering is much easier 😀

Some more smd work tonight. These pcb's are 2 oz copper and sink a lot of heat, not so easy to solder even with a metcal. I need hotter tips...

For the past 8-months, Deep Space Station 43 has been undergoing upgrades. @NASAVoyager-2 has been waiting for us to be able to send it commands once again. On Friday 30th October, we sent those commands & after a 34hour 48 min round trip time, a "hello" came back! #DSS43 @CSIRO

Like the snazzy two-tone paint job of the newly remounted 3.7m antenna?

Wow , nice gear !

Had a great time last sunday ;-) twitter.com/ea3hmj/status/…

@eb3frn @ea3hmj Congrats !