BATC Forum

OE Forum page about it: http://www.oe7forum.at/viewtopic.php?f=42&t=468#p1663

Potential hardware components for Es'HailSat or other terestrial use.

For the satellite reception.... PLL LNB more information here: http://www.oe7forum.at/viewtopic.php?f= ... =135#p1519




To send, UP Converter:
for DVB , CW and SSB signals.... and with DVB signals... http://www.oe7forum.at/viewtopic.php?f= ... =375#p2050

more information here: http://www.oe7forum.at/viewtopic.php?f= ... =150#p2045
Hopefully no more start delays

vy 73 de Darko OE7DBH
oe7dbh@tirol.com


been translated into English with google

...another one LNC for receiving :
Output1 or Port1 for DVB-S
Output2 or Port2 for SSB - CW on 70cm Band 88,00 Euro kit including: LNB , T bias , Adapter F male to BNC female

http://www.ebay.com/itm/BU-500-13cm-Up- ... 33ca9b00b4

HiDes UPconverter made special for EsHail2 HamRadio Transponder...
BU500 Ver.2 and Ver.3 "ready for use" in the housing comes with measurement protocol.

Input Drive Level?

On the image showing the DUT hooked into an analyser the drive level is shown as 0.5mW which is about -3dBm.

However the drive on V1 and V2 is -10dBm which is 0.1mW and the drive on V3 is +10dBm which is 10mW.

Was the original DUT being over driven or under driven I wonder.

The output of a FT818 is about 6W call it 38 dBm. (We all forget to switch the power down at some point!)

a 30dB attenuator will therefore be required to drive the v 3 unit .

I think my Maths is correct.

For a pi circuit
this gives values of 53 ohms and 800 ohms.

The 53 ohm input resistor would need to made up of several to get to this value and be able to sink the power of 6W.

I tried lowering the value to 50 ohms as these are easy to purchase at higher wattages but the return loss gets worse.

A quick google search however found some cheap ready made attenuators.
Roll on pay day

Roll on launch date !???????

73

Nick
G1BVI

On the image showing the DUT hooked into an analyser the drive level is shown as 0.5mW which is about -3dBm.
However the drive on V1 and V2 is -10dBm which is 0.1mW and the drive on V3 is +10dBm which is 10mW.
Was the original DUT being over driven or under driven I wonder.

Picture above shows the inner one of the first prototypes, with more than allowed input Levels ( without Input attenuator and 0,5mW Signal ). Nevertheless clean output signal.

The output of a FT818 is about 6W call it 38 dBm. (We all forget to switch the power down at some point!)

We have a head on our shoulders to think about that

a 30dB attenuator will therefore be required to drive the v 3 unit for SSB-CWYES
For digital Television: attenuator value depends on TX output signal Level , there are two versions UPconverter available

10GHz Octagon down converter...

TCXO at 2ppm, 10ppm normally? That means 20kHz to 100kHz error. OK for DATV but we are going to need a lot better stability for SSB/CW than 2ppm. Any way to develop an LNB for 10 GHz that takes a 10MHz reference input?

g0mjw wrote: ↑

Fri Sep 28, 2018 8:05 am

TCXO at 2ppm, 10ppm normally? That means 20kHz to 100kHz error. OK for DATV but we are going to need a lot better stability for SSB/CW than 2ppm. Any way to develop an LNB for 10 GHz that takes a 10MHz reference input?

Even if I am lazy, I am working on this...

From Twitter it seems people are using these http://www.df9np.de/page4.html

- Charles