GB3GV 146.5 input

[G8DKC]

Just installed a TT-1600 card into GVs PC today, replacing the TT-3200.
I can look at this by remote control and adjust Tutioune while testing.

Hope soon to be switching it to stream and GV output, but in the meantime it will be on....

http://www.vivadatv.org/tutioune.php?om ... ation_id=1

At the moment it's on a 3 ell yagi facing south at about 30ft just to do tests, my personal record,
and a first on 146.5 is 20mW into a 3ell at home QTH 2.5 Miles, through the tree tops, -70 dBm & MER 29 dB.

The 2m big wheel is on order and we are refurbishing a SSB 2m preamp, so that if the device fails,
we can remove power and bypass, and add temp preamp at the bottom.

We have loads of air space under various sliders, so waterproof and hang upside down?
This means it can go much higher, and it's a handful at 1.2m across.

Being 2m looking forward to seeing what happens on the slightest lift.

73

Peter

[M0DTS]

Very nice, look forward to testing it

Rob
M0DTS

[G8DKC]

Picture of 2m Big Wheel ready to go up, and going up at Markfield, 1.2M across!

Temporary 146.5 Yagi at the bottom of the mast.

I'm the one taking the picture.



Peter

[G8DKC]

Have done some more work on the 146.5Mhz Rx and Jean Pierre's version of Tutioune for 1600 card with TS 22Khz "lock light".

The MK I effort is using the Atom N280, 1.66Ghz thin client as shown here... http://www.batc.org.uk/forum/viewtopic. ... 9007#p9007.

After the 146.5 preamp the Rx is a PYE front end chopped off before mixer this feeds SUP2400 with standard 437Mhz Mods then passes through, a FC-AMPSAT/S line amp.

This then goes into a splitter one way to TT 1600 the other to a SEEBEST SB-S12SA4 22Khz Detector switch, the ON LNB-A output is 13v when, there is 22Khz from Tutioune and TS light is on. (I would like an active splitter that would allow the 22Khz back up it to the SEEBEST detector).

The voltage is passed through a pair of rf chokes with .01uf decoupling capacitors scavenged from the "DC Bypass" of a SAC AE5199DC budget, sat attenuator, a 1uf capacitor added across output, giving a little delay to stop fast drop out, can adjust this when fed into GV's Video Switch.

Relay not used in this version.

VLC media player is set to receive the UDP stream from Tutioune, "udp://@230.0.0.1:1234" setup in VLC's network stream, also VLC is set, from Tools/preferences/video settings, to run full screen in tick box and on the Pc's extended monitor e.g. "//./Display2", the output is fed, to a VGA to Composite box, which goes to the port on the video switch, activated by the 13v from the 22Khz SEEBEST detector.

Hoping that Jean Pierre will find the time to put both the TS 22Khz and the UDP switch option into the .ini file so that on power fail and or reboot, Tutioune will run up, ready to repeat the next signal in from the 146.5 Rx.

Using the SUP2400 with 437Mhz mod, Tutioune setting is 02253500Khz and of course 333KS, 13v on, 22Khz TS on, and UDP on.

Hope to do some on-site tests this weekend and check out what's needed in the way of filtering.

Peter

[G8DKC]

Shown on Forum a while back.
Picture of PYE base front end modified and tuned to 146.5Mhz, SUP2400 up converter,
with 437Mhz mods and line amplifier, in old drive case.

[G8DKC]

I was sending everything through the Router!!

New Tutioune settings...

; adresse UDP / UDP address
[UDP]
;AddrUDP=230.0.0.1
AddrUDP=127.0.0.1
;Port=1234

The only one needed is AddrUDP=127.0.0.1 in Tutioune .ini

VLC Network settings udp://@127.0.0.1

73

Peter

[G8DKC]

The experimental MKI system working fine, still not found a working splitter with DC and 22KHz bypass, to replace the horibble coax "T",
(2 more on order to try).

With experimentation by leaving everything "as is" and fitting a 20dB Attenuator with dc bypass (30dB would be nice),
into the center of the "T",that leads to the 22KHZ, detector, isolating the RF side, from the LF Frequency side.

The 146 up converter has arived from DG0VE and Minitune built, so soon will be able to compare the various mix and match builds.

Peter