Post by radiostationx on Oct 31, 2015 2:38:30 GMT 1
You will need :
1. An so-239 flanged /panel mount socket
2. Some stripped core from 2.5 sq mm twin and earth cable.
A 1/4 wave ground plane antenna works extremely well, I made this one with 69mm top element and four slightly shorter length radials to allow for the distance between the centre element and the edge of the flange.
It is critical to measure these correctly, cut the radials to size measuring from the centre element. It is easier to do this with the radials at the horizontal, then bend them to 45-60 degrees.
With a bit of luck, your antenna will be a good performer on its own with these specifications.
My version shown here with a 3ft piece of 20mm electrical conduit from B & Q as an indoor mast to get antenna above window ledge .
"]
Now for some tweaking,lets pinch some tricks from the sat tv guys !
Shopping List
20db german qulaity lnb amplifier from ebay seller in the Netherlands
www.ebay.co.uk/itm/In-Line-Signal-Amplifier-20dB-Axing-Sky-Satellite-Booster-DVB-S-/111790748080?hash=item1a073f71b0:g:f2wAAOSwAodWFAoz
a sat/tv splitter, this will act as a filter for all signals below satellite freqs
www.ebay.co.uk/itm/TV-AERIAL-SATELLITE-LNB-SIGNAL-COMBINER-SPLITTER-HIGH-QUALITY-/150879302869?hash=item23211b74d5
A psu to power the amp, this one from antiference has integral mains filtering and DC blocking built in so you wont fry your receiver.
www.amazon.co.uk/dp/B00AE4X2RU/ref=pd_lpo_sbs_dp_ss_1?pf_rd_p=569136327&pf_rd_s=lpo-top-stripe&pf_rd_t=201&pf_rd_i=B003ESWETU&pf_rd_m=A3P5ROKL5A1OLE&pf_rd_r=0RM9TRZ4GSP2KVXD26S8
Some good quality f plugs
www.ebay.co.uk/itm/Qty-10-High-Quality-Big-Nut-F-Connector-Sky-TV-or-VIRGIN-Coax-Cable-F-Plugs-C08-/251616212131?hash=item3a957eb4a3
Some nice coaxial to connect it all up, Webro is a well respected manufacturer..make sure its original webro
www.ebay.co.uk/itm/25m-WF100-BELDEN-WEBRO-COAX-CABLE-DIGITAL-TV-/360329254175?hash=item53e54c151f:m:mN6knf98bjUuxk_4Im72u5A
Connect it all up like this
"]
Edit,
You will notice the no connection at the splitter "tv" connector, just to tidy things up, I inserted a 75 ohm terminator at this point obtained from the same ebay supplier of the splitter/combiner. This is a non essential item / builder option.
www.ebay.co.uk/itm/5-x-75-F-Type-Coaxial-Port-Terminator-Aerial-Satellite-LNB-Virgin-Media-Cable-/160764110465
Although the axing amplifier is specified with 14-18v dc supply (typical voltage for lnb arrays), the 12vdc from the antiference PSU is well enough and it draws very little current. it chugs away happily on my adsb monitoring station 24/7/365.
Specifications/Datasheet on the Axing Amplifier
www.axing.com/download/Katalog_Prospekte/SVS-2-xx_4-00.pdf
Hope this helps NWAN members.
Mike.
uk.flightaware.com/adsb/stats/user/Radiostationx
1. An so-239 flanged /panel mount socket
2. Some stripped core from 2.5 sq mm twin and earth cable.
A 1/4 wave ground plane antenna works extremely well, I made this one with 69mm top element and four slightly shorter length radials to allow for the distance between the centre element and the edge of the flange.
It is critical to measure these correctly, cut the radials to size measuring from the centre element. It is easier to do this with the radials at the horizontal, then bend them to 45-60 degrees.
With a bit of luck, your antenna will be a good performer on its own with these specifications.
My version shown here with a 3ft piece of 20mm electrical conduit from B & Q as an indoor mast to get antenna above window ledge .
"]Now for some tweaking,lets pinch some tricks from the sat tv guys !
Shopping List
20db german qulaity lnb amplifier from ebay seller in the Netherlands
www.ebay.co.uk/itm/In-Line-Signal-Amplifier-20dB-Axing-Sky-Satellite-Booster-DVB-S-/111790748080?hash=item1a073f71b0:g:f2wAAOSwAodWFAoz
a sat/tv splitter, this will act as a filter for all signals below satellite freqs
www.ebay.co.uk/itm/TV-AERIAL-SATELLITE-LNB-SIGNAL-COMBINER-SPLITTER-HIGH-QUALITY-/150879302869?hash=item23211b74d5
A psu to power the amp, this one from antiference has integral mains filtering and DC blocking built in so you wont fry your receiver.
www.amazon.co.uk/dp/B00AE4X2RU/ref=pd_lpo_sbs_dp_ss_1?pf_rd_p=569136327&pf_rd_s=lpo-top-stripe&pf_rd_t=201&pf_rd_i=B003ESWETU&pf_rd_m=A3P5ROKL5A1OLE&pf_rd_r=0RM9TRZ4GSP2KVXD26S8
Some good quality f plugs
www.ebay.co.uk/itm/Qty-10-High-Quality-Big-Nut-F-Connector-Sky-TV-or-VIRGIN-Coax-Cable-F-Plugs-C08-/251616212131?hash=item3a957eb4a3
Some nice coaxial to connect it all up, Webro is a well respected manufacturer..make sure its original webro
www.ebay.co.uk/itm/25m-WF100-BELDEN-WEBRO-COAX-CABLE-DIGITAL-TV-/360329254175?hash=item53e54c151f:m:mN6knf98bjUuxk_4Im72u5A
Connect it all up like this
"]Edit,
You will notice the no connection at the splitter "tv" connector, just to tidy things up, I inserted a 75 ohm terminator at this point obtained from the same ebay supplier of the splitter/combiner. This is a non essential item / builder option.
www.ebay.co.uk/itm/5-x-75-F-Type-Coaxial-Port-Terminator-Aerial-Satellite-LNB-Virgin-Media-Cable-/160764110465
Although the axing amplifier is specified with 14-18v dc supply (typical voltage for lnb arrays), the 12vdc from the antiference PSU is well enough and it draws very little current. it chugs away happily on my adsb monitoring station 24/7/365.
Specifications/Datasheet on the Axing Amplifier
www.axing.com/download/Katalog_Prospekte/SVS-2-xx_4-00.pdf
Hope this helps NWAN members.
Mike.
uk.flightaware.com/adsb/stats/user/Radiostationx