*sig* this bad ( LNA vs tv amp.


#1

just installed my sat lna amp on my antenna.
10 planes lesser !
seems my cheap TV amp was beter as i tought.
well, lets find a sat lna that does 30db !!


#2

Did you use a power inserter with your satellite amp?


#3

yes.
but seems my sat lna gives lesser gain in the lower freq as i tought.
time to cook me a coco and ditch the spider gp.
PS.
with no power on lna no planes xD


#4

OK, I was just making sure that wasn’t the problem. I am using both the sat amp and sat lna. My RF chain is: antenna-sat amp-coax-power inserter-coax-sat lna-receiver. Try using both and see if it’s better.


#5

i tried seting gain on dongle ,but no difrence, i tought, perhaps to much gain (set to 35 (max 49)) ,lesser gain, lesser planes, so dongle gain is ok.
wel, it was a experiment worth, didnt expect that the cheap TV amp performed so good…


#6

What brand/model LNA amp is this so I can remember not to get one?

Cheers!
LitterBug


#7

cheap one ,6 euro in price.
the beter lna’s work beter i think, but dont forget, i HAD first a TV amp that pumped around the same gain ,20 db that is.
and i think that that amp did 20db ,while the lna amp started with a lower db on 1.1ghz and goes up more in freq.
not gonna buy a hirshman for 60 euro for a experiment, well, as say’d ,next project coco…
oh, the lna amp had a lower noise floor as the tv amp, so that was ok (3 vs 5 db)


#8

actualy…
i am wonddering…
on june 5, i received 306K reports., and 264K adsb reports ,this was the day i switched the amp.
seeing the average stats after it. 222k reports, and 185K adsb reports.(today)

but on air craft seen 5.3k on june 5, and 4.2 adsb crafts seen, and after the amp 5.3K and 4.3K adsb crafts seen (today)
so now i am confused.
in reports i droped, but aircrafts seen, well…
perhaps the picture can tell more.

any ideas what counts more…


#9

Could you check your message rate? It maybe some overload on your receiver input that drop down your position count. Can also be a near mobile cell tower disturbing by near frequency.
Something like you get same range and planes but less messages.


#10

Only this.
Well, i placed back my old amp ,that is spamming this, but keep in mind ,its late already.
not sure if i can go back even further.
[2015-06-16 22:37 CEST] 2612045 msgs recv’d from dump1090 via faup1090 (529 in last 5m); 2591339 msgs sent to FlightAware
[2015-06-16 22:42 CEST] 2612784 msgs recv’d from dump1090 via faup1090 (739 in last 5m); 2592078 msgs sent to FlightAware
[2015-06-16 22:47 CEST] 2613562 msgs recv’d from dump1090 via faup1090 (778 in last 5m); 2592856 msgs sent to FlightAware
[2015-06-16 22:52 CEST] 2614236 msgs recv’d from dump1090 via faup1090 (674 in last 5m); 2593530 msgs sent to FlightAware
[2015-06-16 22:57 CEST] 2614850 msgs recv’d from dump1090 via faup1090 (614 in last 5m); 2594144 msgs sent to FlightAware
[2015-06-16 23:02 CEST] 2615539 msgs recv’d from dump1090 via faup1090 (689 in last 5m); 2594833 msgs sent to FlightAware
[2015-06-16 23:07 CEST] 2616183 msgs recv’d from dump1090 via faup1090 (644 in last 5m); 2595477 msgs sent to FlightAware
[2015-06-16 23:12 CEST] 2616851 msgs recv’d from dump1090 via faup1090 (668 in last 5m); 2596145 msgs sent to FlightAware
[2015-06-16 23:17 CEST] 2617516 msgs recv’d from dump1090 via faup1090 (665 in last 5m); 2596810 msgs sent to FlightAware
[2015-06-16 23:22 CEST] 2618153 msgs recv’d from dump1090 via faup1090 (637 in last 5m); 2597447 msgs sent to FlightAware
[2015-06-16 23:27 CEST] 2618730 msgs recv’d from dump1090 via faup1090 (577 in last 5m); 2598024 msgs sent to FlightAware
[2015-06-16 23:32 CEST] 2619199 msgs recv’d from dump1090 via faup1090 (469 in last 5m); 2598493 msgs sent to FlightAware
[2015-06-16 23:37 CEST] 2619634 msgs recv’d from dump1090 via faup1090 (435 in last 5m); 2598928 msgs sent to FlightAware
[2015-06-16 23:42 CEST] 2620140 msgs recv’d from dump1090 via faup1090 (506 in last 5m); 2599434 msgs sent to FlightAware
[2015-06-16 23:47 CEST] 2620644 msgs recv’d from dump1090 via faup1090 (504 in last 5m); 2599938 msgs sent to FlightAware
[2015-06-16 23:52 CEST] 2621160 msgs recv’d from dump1090 via faup1090 (516 in last 5m); 2600454 msgs sent to FlightAware
[2015-06-16 23:57 CEST] 2621620 msgs recv’d from dump1090 via faup1090 (460 in last 5m); 2600914 msgs sent to FlightAware
[2015-06-17 00:02 CEST] 2622110 msgs recv’d from dump1090 via faup1090 (490 in last 5m); 2601404 msgs sent to FlightAware
[2015-06-17 00:07 CEST] 2622586 msgs recv’d from dump1090 via faup1090 (476 in last 5m); 2601880 msgs sent to FlightAware
[2015-06-17 00:12 CEST] 2623067 msgs recv’d from dump1090 via faup1090 (481 in last 5m); 2602361 msgs sent to FlightAware
[2015-06-17 00:17 CEST] 2623560 msgs recv’d from dump1090 via faup1090 (493 in last 5m); 2602854 msgs sent to FlightAware


#11

Did you upgrade to the new mlat client? There are several reports in the forum, including from me, who upgraded and then their position counts dropped.

Marty


#12

i have MLAT disabled…(well, had, and good morning)
but enabled it just …