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happy new year to all.. and abcd567 hi sir ! im thinking to add inline amp to my 1090mhz antenna so i bought a LNB from local vendor and its got 2xR24(2SC3356) and some stupid circuit and i tried with rtl and made my own power injector using 600ohm resistor instead of coil since i donno how to make it
(help here also appreciated). and started my sdrsharp to see difference.. but to my wonder it was the same even i gave the power to amp or not.. no gain at all.. so i dismantled it and secured R24 resistors. so can you please provide a small amp circuit for R24 (2SC3356). searched internet but couldn't find one :/ thanks,.
RTL SDR : T-VEVZ1
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Originally posted by charan View Posthappy new year to all.. and abcd567 hi sir ! im thinking to add inline amp to my 1090mhz antenna so i bought a LNB from local vendor and its got 2xR24(2SC3356) and some stupid circuit and i tried with rtl and made my own power injector using 600ohm resistor instead of coil since i donno how to make it
(help here also appreciated). and started my sdrsharp to see difference.. but to my wonder it was the same even i gave the power to amp or not.. no gain at all.. so i dismantled it and secured R24 resistors. so can you please provide a small amp circuit for R24 (2SC3356). searched internet but couldn't find one :/ thanks,.
I could not find any amplifier circuit for 2SC3356 transistor, but found two circuits using BFP420 Transistor.
Source: http://www.lll.lu/~edward/edward/ads...DSBpremap.html
LNA-1R.PNG Preamp 3 Res Sma.jpg
Source: https://blackbirdengineering.wordpre...lna-for-ads-b/
LNA-2.png
I don't understand why you purchased Satellite Dish LNB, and then from it's parts want to make LNA for ADS-B? You can directly purchase satellite in Line amplifier cheaper than satellite dish LNB. I am sure in Line amplifiers are available in satellite dish antenna shops in your area. In case you canot find in stores in your neighborhood, try eBay India links below.
Indian Rs 2,250 : http://geb.ebay.in/g/ImportHubViewIt...llite-FTA-Coax
Aska in Line Amp.JPG
Indian Rs 8,687: http://geb.ebay.in/g/ImportHubViewIt...Amplifier-D903
RCA in Line Amp.JPGLast edited by abcd567; 2015-01-03, 22:56.
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Originally posted by abcd567 View PostHi charan!
I could not find any amplifier circuit for 2SC3356 transistor, but found two circuits using BFP420 Transistor.
Source: http://www.lll.lu/~edward/edward/ads...DSBpremap.html
[ATTACH=CONFIG]5325[/ATTACH]
Source: https://blackbirdengineering.wordpre...lna-for-ads-b/
[ATTACH=CONFIG]5326[/ATTACH]
I don't understand why you purchased Satellite Dish LNB, and then from it's parts want to make LNA for ADS-B? You can directly purchase satellite in Line amplifier cheaper than satellite dish LNB. I am sure in Line amplifiers are available in satellite dish antenna shops in your area. In case you canot find in stores in your neighborhood, try eBay India links below.
Indian Rs 2,250 : http://geb.ebay.in/g/ImportHubViewIt...llite-FTA-Coax
[ATTACH=CONFIG]5327[/ATTACH]
Indian Rs 8,687: http://geb.ebay.in/g/ImportHubViewIt...Amplifier-D903
[ATTACH=CONFIG]5328[/ATTACH]i already ordered BFP420.. Thanks !
RTL SDR : T-VEVZ1
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Originally posted by charan View PostThanks because its too costly for me.i already ordered BFP420.. Thanks !
(1) capacitors are damaged by too much heat when soldering iron is applied for too long when they are soldered and therefore the gain drops too much due to very small serial capacitor that rests.
(2) a bad soldering can create a short-circuit.
(3) RF design include proper layout. If layout is not carefully done, performance can be poor. (You don't have to worry about it as layout design is already done for schematics I have given in the last post. Visit their web pages for details of circuit board layout)
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@charan:
Another Amplifier circuit from Infineon (Siemens), one of the manufacturers of transistor BFP420
Source: http://www.infineon.com/dgdl/AN018.p...1427688a990761
Infineon-Siemens BFP420-900 MHz Amplifier-1.PNG Infineon-Siemens BFP420-900 MHz Amplifier-2.PNG
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Originally posted by charan View PostThanks because its too costly for me.i already ordered BFP420.. Thanks !
Try local satellite dish stores in your area. These may have low priced satellite amplifers. The eBay prices were high because sellers were located in USA. Try these Indian manufacturers near your city:
Chennai: http://m.indiamart.com/proddetail.php?i=6850073662
Bangaluru: http://m.indiamart.com/proddetail.php?i=7113240312
New Delhi (Indian Rs 400): http://m.indiamart.com/proddetail.php?i=5675435873
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Originally posted by abcd567 View PostTo make the printed circuit board accurately according to design is a tricky job, particularly if you dont have proper tools. The pcb can be made by a knife only using cut & scrach, but to achieve accuracy by this simple method is difficult.
Try local satellite dish stores in your area. These may have low priced satellite amplifers. The eBay prices were high because sellers were located in USA. Try these Indian manufacturers near your city:
Chennai: http://m.indiamart.com/proddetail.php?i=6850073662
Bangaluru: http://m.indiamart.com/proddetail.php?i=7113240312
New Delhi (Indian Rs 400): http://m.indiamart.com/proddetail.php?i=5675435873will buy one will let you know thanks again
RTL SDR : T-VEVZ1
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Originally posted by abcd567 View PostSome tips for assembling the amplifier with very small (SMT) components:
(1) capacitors are damaged by too much heat when soldering iron is applied for too long when they are soldered and therefore the gain drops too much due to very small serial capacitor that rests.
(2) a bad soldering can create a short-circuit.
(3) RF design include proper layout. If layout is not carefully done, performance can be poor. (You don't have to worry about it as layout design is already done for schematics I have given in the last post. Visit their web pages for details of circuit board layout)
IMG_20150104_122508334_HDR.jpgIMG_20150104_122521697_HDR.jpgIMG_20150104_122531509.jpgRTL SDR : T-VEVZ1
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RTL SDR : T-VEVZ1
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Originally posted by charan View Postcan i make the above provided circuit like this? i have this kind of pcb's available.. and thats a J-Pole antenna and made 4 rounds of the default RG174 to work as balun.. will it work? (i got little more range like 2nmi) and this antenna is giving the same result as 8-1/4 COCO antenna.. so is this okay? or coco should have more gain?
[ATTACH=CONFIG]5336[/ATTACH][ATTACH=CONFIG]5337[/ATTACH][ATTACH=CONFIG]5338[/ATTACH]T-EGLF8
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Originally posted by charan View Post
Ben.FR24 F-EGLF1, Blitzortung station 878, OGN Aldersht2, PilotAware PWAldersht, PlanePlotter M7.
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Originally posted by charan View Post
Now purchase or make a power inserter & DC blocker. I think you are skilled enough to make these. What you need is 2 Coax splitters, 2 capacitor any value from 100pF to 470pF, and 1 inductor any value from 2 uH to 10 uH.Last edited by abcd567; 2015-01-04, 18:34.
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