highaltitude.log.20201204

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[00:47] <SpacenearUS> New vehicle on the map: 03VK4CU9 - 12https://tracker.habhub.org/#!qm=All&q=VK4CU9
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[01:26] <SpacenearUS> New vehicle on the map: 03MTG004 - 12https://tracker.habhub.org/#!qm=All&q=MTG004
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[02:00] <SpacenearUS> New position from 03WB6TOU-11 after 037 hours silence - 12https://tracker.habhub.org/#!qm=All&q=WB6TOU-11
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[02:10] <SpacenearUS> New vehicle on the map: 03VK3YSP_chase - 12https://tracker.habhub.org/#!qm=All&q=VK3YSP_chase
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[02:49] <SpacenearUS> New vehicle on the map: 03VK4CU_Chase - 12https://tracker.habhub.org/#!qm=All&q=VK4CU_Chase
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[04:07] <SpacenearUS> New vehicle on the map: 03ThaiPhone_chase - 12https://tracker.habhub.org/#!qm=All&q=ThaiPhone_chase
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[07:35] <SpacenearUS> New position from 03N6RRY-11 after 0317 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N6RRY-11
[07:37] <jadew> hey guys, what are the receiver setups usually used in this field?
[07:37] <jadew> I'm interested in both hobby and professionally use
[07:38] <SA6BSS-Mike> mostly sdr radios I guess, many starts with the rtl-sdr and then moves on to the rsp1a or the airpy devices
[07:39] <jadew> SA6BSS-Mike, thanks
[07:40] <jadew> is rsp1a new? I haven't heard of it before
[07:40] <SA6BSS-Mike> no, its not that new, 2 years?
[07:40] <SA6BSS-Mike> 18month?
[07:40] <jadew> looks very interesting
[07:41] <SA6BSS-Mike> it in my opnion most bang for the buck, both hf , vhf and uhf
[07:42] <jadew> looks well specified too
[07:42] <SA6BSS-Mike> if you are only interested in vhf/uhf look at the airspy mini
[07:42] <SA6BSS-Mike> slightly cheaper
[07:43] <jadew> ah, no, I'm just interested in what people are using - I'm making amplifiers and want to figure out what would be helpful
[07:44] <SA6BSS-Mike> mastops amps ofc then, most sdr have bias-t power out
[07:45] <jadew> I would have to target a particular voltage I guess
[07:46] <SA6BSS-Mike> 5v
[07:46] <jadew> yeah, that's difficult...
[07:46] <SA6BSS-Mike> or 4-5
[07:46] <SA6BSS-Mike> most mmis is in that range?
[07:46] <SA6BSS-Mike> *mmic
[07:47] <jadew> sure, but the input voltage changes the bias network
[07:47] <SA6BSS-Mike> ?
[07:47] <jadew> and that in turn changes the frequency response
[07:48] <jadew> the devices itself have a fixed operating voltage
[07:48] <jadew> say 3 V
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[07:48] <jadew> to hit that, you have to use a resistor in the bias network
[07:49] <SA6BSS-Mike> or a low noice ldo?
[07:49] <jadew> if you change its value, you change the effect the bias network has on the frequency response
[07:49] <jadew> well, yeah, but then the bias network becomes more demanding
[07:50] <SA6BSS-Mike> doing it professional I guess its more to think aout then playing with it on your own radio
[07:51] <SA6BSS-Mike> there is a habamp avalible for 434 work https://store.uputronics.com/index.php?route=product/product&product_id=53
[07:52] <SA6BSS-Mike> https://store.uputronics.com/index.php?route=product/category&path=59
[07:53] <jadew> I'm aware of that one, it's similar to one of my products: https://cojotech.com/media/datasheets/LLNA-433-10%20-%20Datasheet.pdf
[07:54] <jadew> I can't get it to operate at 5 V and offer reliable performance tho
[07:54] <jadew> especially not when powered through the cable
[07:58] <jadew> hmm, the RSP1A has only 0 dBm maximum input power
[07:58] <jadew> most other SDR receivers have 10
[08:00] <jadew> I think I'll buy one of those RSP1A too
[08:00] <SA6BSS-Mike> cool, reading up...
[08:08] <jadew> any ideas on what radios are used professionally?
[08:09] <SpacenearUS> New position from 03PS-80 after 0311 hours silence - 12https://tracker.habhub.org/#!qm=All&q=PS-80
[08:09] <jadew> I suppose they could have custom built devices
[08:09] <SA6BSS-Mike> https://www.ettus.com/
[08:09] <SA6BSS-Mike> and...
[08:10] <jadew> oh, ettus has a new line of receivers, nice
[08:11] <SA6BSS-Mike> realy dont know, only read a few articles and it seems like Ettus was mostly used
[08:13] <jadew> I remember I wasn't impressed with their offerings several years ago, but price might have been a factor
[08:15] <SA6BSS-Mike> yes, might have :) , they are Pricey!
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[08:17] <jadew> "The maximum input power for the E320 is -15 dBm." - ugh... definitely not gonna hit that
[08:17] <jadew> that's a very low maximum input level
[08:26] <jadew> SA6BSS-Mike, thanks for the info, I appreciate it
[08:26] <SA6BSS-Mike> :)
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[08:42] <jadew> now... in terms of transmitters - what's the go-to one?
[08:42] <jadew> :)
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[11:24] <SA6BSS-Mike> jadew: sdr transmitters?
[11:25] <SA6BSS-Mike> hoby tx , Lime/Lime mini, Pluto, hck rf
[11:25] <SA6BSS-Mike> *hack rf
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[11:27] <SA6BSS-Mike> "real" ones flexradio,
[11:27] <SA6BSS-Mike> USRP B210
[11:28] <SA6BSS-Mike> Anan
[11:29] <SA6BSS-Mike> a few more
[11:36] <SpacenearUS> New vehicle on the map: 03EPSOM - 12https://tracker.habhub.org/#!qm=All&q=EPSOM
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[11:38] <jadew> SA6BSS-Mike, I meant as the payload
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[11:40] <Hooloovo0> for sdr transmitters there's also the very sketchy fl2k usb3/vga adapter which relies on harmonics - please don't use outside of a lab
[11:40] <Hooloovo0> (interested in payload transmitters)
[11:40] <bertrik> ntx2 is used a lot I think
[11:40] <bertrik> https://ukhas.org.uk/guides:linkingarduinotontx2
[11:42] <jadew> thanks
[11:42] <bertrik> IIRC it can also be practical to have a transmitter that can work at low temperature with a low frequency drift
[11:44] <bertrik> https://ukhas.org.uk/guides:radio_modules:ntx2 says some things about that
[11:46] <bertrik> I know people have also done very nice experimental stuff with those digitally tuned transmitter, even tuning the oscillator so that the digital frequency steps matched up with the protocol shift, I think this was DominoEx
[11:47] <PE2BZ> jadew, sorry for jumping in, the LLNA-433 but as 437 MHz version ? 435 - 438 MHz for ham sat use ?
[11:50] <jadew> PE2BZ, I can look into it
[11:50] <jadew> what's the exact frequency range?
[11:51] <PE2BZ> 435 is the start of the satellite band, 438 is the start of the DMR repeater band
[11:51] <PE2BZ> so 436.5 centered ?
[11:51] <PE2BZ> afk for a bit now
[11:54] <jadew> me too, I'll be back in 15 min or so
[11:54] <SA6BSS-Mike> hf ones is skytracker, zacketch, LightAPRS(hf&vhf) , pi in the sky - pisky, a few more, Il get back on that later
[12:01] <jadew> back
[12:03] <SpacenearUS> New position from 03N4XWC-1 after 0310 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N4XWC-1
[12:07] Nick change: fl__0 -> fl_0
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[12:23] <jadew> PE2BZ, I put that on my todo list, I'll look into it over the weekend
[12:29] <jadew> SA6BSS-Mike, thanks for that list
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[12:58] <_Jordan> Hey can anyone tune into. 434.662 MHZ 600 shift, 300 baud, 8 bits per character, no parity and 2 stop bits. Heading North east england
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[14:40] <SA6BSS-Mike> jadew: www.tracksoar.com and www.zachtek.com/product-page/wspr-tx-pico-transmitter as off the shelf boards, mostly people doed their own trackers, and as there is dropping RS41 wx sondes all around the world and there is
[14:40] <SA6BSS-Mike> several fw devloped for those they tend to be quite useble - and free :)
[14:41] <SA6BSS-Mike> both aprts , rtty and lately 4fsk have been used on about every flight
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[16:37] <OZ1SKY_Brian> 868 getting more and more busy here https://pasteboard.co/JDo8T2l.png
[16:38] <OZ1SKY_Brian> no idea what those 3 high level signal are
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[16:39] <OZ1SKY_Brian> 4 in fact, there is one abit lower too
[16:44] <SpacenearUS> New position from 03SP9UOB after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=SP9UOB
[16:44] <SpacenearUS> New position from 03SP9UOB-P39 after 03a day silence - 12https://tracker.habhub.org/#!qm=All&q=SP9UOB-P39
[16:49] <SpacenearUS> New position from 03W4DNQ-15 after 0321 hours silence - 12https://tracker.habhub.org/#!qm=All&q=W4DNQ-15
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[17:13] <SpacenearUS> New vehicle on the map: 03KE7OBI-11 - 12https://tracker.habhub.org/#!qm=All&q=KE7OBI-11
[17:16] Nick change: Wiktor_ -> wiktor_1
[17:22] gb73d (gb73d@79-76-156-48.dynamic.dsl.as9105.com) joined #highaltitude.
[17:37] Nick change: wiktor_1 -> Wiktor
[18:08] <PE2BZ> OZ1SKY_Brian, strong signals in 868 indeed! 100 percent duty cycle ?
[18:08] YO9GJX (~YO9GJX@109.100.112.132) left irc: Read error: Connection reset by peer
[18:08] <OZ1SKY_Brian> yes on all the time
[18:09] <OZ1SKY_Brian> no idea what it is
[18:09] <OZ1SKY_Brian> 4 of them
[18:09] YO9GJX (~YO9GJX@109.100.112.132) joined #highaltitude.
[18:11] <PE2BZ> what´s the bandwidth for one carrier ?
[18:12] <OZ1SKY_Brian> about 40khz
[18:13] <OZ1SKY_Brian> https://pasteboard.co/JDoLB2Q.png 40khz marker span
[18:14] <PE2BZ> Looks unfamiliair to me ...
[18:17] <OZ1SKY_Brian> there is what sounds like a sync signal in it on the lower sideband
[18:17] <OZ1SKY_Brian> alternating tones
[18:20] <OZ1SKY_Brian> maybe a radio modem
[18:20] <OZ1SKY_Brian> something like this https://www.satel.com/products/radio-modems/satelline-easy-869/
[18:22] <PE2BZ> None of those signals should transmit 100 percent in that frequency band. Microphones and headphones in 863 are allowed, but 0.5 and 1 W transmitters are < 0.1 percent duty cycle. And it does not look digital for supporting 4g 5g 3g or other phone network.
[18:23] SQ9GOL (~Peter@ip-178-108.ists.pl) joined #highaltitude.
[18:24] <OZ1SKY_Brian> yes as you see, those are the only 100% signals https://pasteboard.co/JDoQ44c.png
[18:26] <OZ1SKY_Brian> not sure that that 866ish signal is, its on for some time
[18:28] thecivvie (~thecivvie@86-42-227-194-dynamic.agg7.cdn.mvw-sla.eircom.net) joined #highaltitude.
[18:30] <PE2BZ> That one looks FM modulated ?
[18:36] <OZ1SKY_Brian> got 3 of them on and off
[18:38] <OZ1SKY_Brian> around 75khz wide
[18:41] <OZ1SKY_Brian> fox hunt :-)
[18:45] <OZ1SKY_Brian> sounds like r2d2 when it transmits
[18:52] <PE2BZ> now all we need is r2d2 translator ;-)
[18:54] <OZ1SKY_Brian> yes :-)
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[19:15] PE1PSI-1 (~PE1PSI-3@2001:1c05:270b:9f00:3570:aa49:1d92:ba37) left irc: Ping timeout: 244 seconds
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[19:33] Chrischan (~chrischan@ip5f5aff74.dynamic.kabel-deutschland.de) joined #highaltitude.
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[19:57] Kodar (~Kodar@93-142-40-228.adsl.net.t-com.hr) joined #highaltitude.
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[20:15] <SpacenearUS> New position from 03NU6XB-12 after 0320 hours silence - 12https://tracker.habhub.org/#!qm=All&q=NU6XB-12
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[21:04] KevWal (557335ca@85.115.53.202) left irc: Remote host closed the connection
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[21:12] gartt (gart@ip68-14-86-104.ri.ri.cox.net) left #highaltitude.
[21:12] KevWal (~KevWal@2a00:23c6:a280:5c01:a173:831:4880:e4b5) joined #highaltitude.
[21:13] KevWal (~KevWal@2a00:23c6:a280:5c01:a173:831:4880:e4b5) left irc: Client Quit
[21:13] KevWal (~KevWal@2a00:23c6:a280:5c01:a173:831:4880:e4b5) joined #highaltitude.
[21:30] <SpacenearUS> New vehicle on the map: 03G7PMO_Chase - 12https://tracker.habhub.org/#!qm=All&q=G7PMO_Chase
[21:35] KevWal (~KevWal@2a00:23c6:a280:5c01:a173:831:4880:e4b5) left irc: Read error: Connection reset by peer
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[21:42] kedidie (~kedidie@ptr-4inhh45t3cqd4nl599.18120a2.ip6.access.telenet.be) left irc: Quit: Leaving
[22:00] <SpacenearUS> New position from 03WB6TOU-11 after 0320 hours silence - 12https://tracker.habhub.org/#!qm=All&q=WB6TOU-11
[22:02] <SpacenearUS> New vehicle on the map: 03KEW02 - 12https://tracker.habhub.org/#!qm=All&q=KEW02
[22:12] Laurenceb (~laurence@189.141.208.46.dyn.plus.net) joined #highaltitude.
[22:17] KevWal (~KevWal@host86-158-144-33.range86-158.btcentralplus.com) left irc: Read error: Connection reset by peer
[22:21] Lahti (~Lahti@dyvym-3cz6xq82kc9v8gy-4.rev.dnainternet.fi) left irc: Quit: Lähdössä
[22:21] KevWal (~KevWal@host86-158-144-33.range86-158.btcentralplus.com) joined #highaltitude.
[22:28] SQ9GOL (~Peter@ip-178-108.ists.pl) left irc: Quit: Going offline, see ya! (www.adiirc.com)
[22:30] OZ1SKY_Brian (~OZ1SKY@5.186.79.28.dhcp.fibianet.dk) left irc: Remote host closed the connection
[22:35] KevWal (~KevWal@host86-158-144-33.range86-158.btcentralplus.com) left irc: Read error: Connection reset by peer
[22:37] KevWal (~KevWal@2a00:23c6:a280:5c01:3c1a:6a81:64c5:4f6e) joined #highaltitude.
[22:44] chris_99 (uid26561@gateway/web/irccloud.com/x-vkziysuboqqntrwz) left irc:
[22:46] KevWal (~KevWal@2a00:23c6:a280:5c01:3c1a:6a81:64c5:4f6e) left irc: Read error: Connection reset by peer
[22:51] FireFighter (~firefight@2601:44:4380:605c:8caa:e98c:cf11:92dd) left irc: Remote host closed the connection
[22:55] KevWal (~KevWal@host86-158-144-33.range86-158.btcentralplus.com) joined #highaltitude.
[22:56] KevWal (~KevWal@host86-158-144-33.range86-158.btcentralplus.com) left irc: Read error: Connection reset by peer
[22:57] KevWal (~KevWal@2a00:23c6:a280:5c01:3c1a:6a81:64c5:4f6e) joined #highaltitude.
[22:57] LazyLeopard (~irc-clien@chocky.lazyleopard.org.uk) left irc: Quit: Textual IRC Client: www.textualapp.com
[23:02] KevWal (~KevWal@2a00:23c6:a280:5c01:3c1a:6a81:64c5:4f6e) left irc: Remote host closed the connection
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[23:14] <SpacenearUS> New position from 03N4XWC-1 after 0311 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N4XWC-1
[00:00] --- Sat Dec 5 2020