[00:03] LazyLeopard (~irc-clien@chocky.demon.co.uk) left irc: Quit: Bye [00:22] fsphil (~phil@2001:470:1f09:483:21f:c6ff:fe44:b25b) left irc: Quit: I iz zleeping. Rar [00:27] sorry i was away from pc fsphil [00:27] things are good, all applications sent [00:27] hi [00:27] back from hackspace [00:28] 5 applications were a pain, had to buy 34 quids worth of maps [01:02] natrium42 (~natrium@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) joined #highaltitude. [01:44] ProjectCirrus (~rhspm@cpc1-belf9-0-0-cust338.belf.cable.ntl.com) left irc: [04:36] Nick change: jos -> Jos [04:37] rjharrison_eee (~robert@62.49.185.11) joined #highaltitude. [04:40] yo rjharrison_eee [04:41] rjharrison_eee (~robert@62.49.185.11) left irc: Ping timeout: 258 seconds [05:26] jasonb (~jasonb@dsl027-180-244.sfo1.dsl.speakeasy.net) left irc: Ping timeout: 260 seconds [05:48] jasonb (~jasonb@m360536d0.tmodns.net) joined #highaltitude. [06:01] natrium42 (~natrium@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) left irc: Quit: My other car is a cdr. [06:09] akawaka (~akawaka@icculus.org) left irc: Ping timeout: 276 seconds [06:11] Simon-MPFH (~simon@phantom.mpfh.co.uk) joined #highaltitude. [06:12] darknesslord_ (~darknessl@189.164.1.41) left irc: Quit: can i haz interlolz? [06:13] natrium42 (~natrium@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) joined #highaltitude. [06:15] rjharrison (~rharrison@62.49.185.11) joined #highaltitude. [06:15] morning all [06:15] Trust were all well [06:15] we're [06:16] going to make T [06:16] hey rjharrison [06:16] what kind of T? [06:18] icez (~icez@unaffiliated/icez) left irc: Read error: Connection reset by peer [06:20] jasonb (~jasonb@m360536d0.tmodns.net) left irc: Ping timeout: 265 seconds [06:28] natrium42 the Tea type :) [06:29] Long day at work today [06:32] Laters all [06:32] rjharrison (~rharrison@62.49.185.11) left irc: [06:36] icez (~icez@unaffiliated/icez) joined #highaltitude. [07:02] G8DSU (~chatzilla@cpc3-mort4-0-0-cust192.croy.cable.virginmedia.com) left irc: Quit: ChatZilla 0.9.86 [Firefox 3.5.8/20100202165920] [07:07] jasonb (~jasonb@adsl-66-124-73-250.dsl.sntc01.pacbell.net) joined #highaltitude. [07:19] sbasuita (~sbasuita@unaffiliated/drebellion) left irc: Read error: Connection reset by peer [07:21] sbasuita (~sbasuita@unaffiliated/drebellion) joined #highaltitude. [07:26] sbasuita!!! [07:26] junderwood (~John@adsl.jcu.me.uk) joined #highaltitude. [07:26] how are the winds? [08:16] natrium42 (~natrium@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) left irc: Quit: My other car is a cdr. [08:20] b3cft (~abrock@nat/yahoo/x-jcosecqmynkloamm) joined #highaltitude. [09:15] icez (~icez@unaffiliated/icez) left irc: Remote host closed the connection [09:19] Hiena (~Hiena@81.93.195.181.datatrans.hu) joined #highaltitude. [10:12] SpeedEvil (~user@tor/regular/SpeedEvil) left irc: Quit: Leaving. [10:13] SpeedEvil (~user@tor/regular/SpeedEvil) joined #highaltitude. [10:17] morning all [10:17] pschulz01 (~paul@ubuntu/member/pschulz01) joined #highaltitude. [10:33] Simon-MPFH (~simon@phantom.mpfh.co.uk) left irc: Quit: Leaving [10:47] Laurenceb (~laurence@host81-154-84-43.range81-154.btcentralplus.com) joined #highaltitude. [11:16] grummund (~grummund@unaffiliated/grummund) left irc: Ping timeout: 258 seconds [11:25] edmoore (~ed@chu-gw-a.churchillcambridge.co.uk) joined #highaltitude. [11:27] hi edmoore [11:28] juxta: Ping [11:28] hi jonsowman [11:28] hows things? [11:28] so we are keeping the basement room for a few months [11:28] oh right [11:29] is this a "we'll see what happens in a few months" or is there somewhere else planned for us? [11:30] oh, lord knows [11:30] i see [11:30] he's said we'll have an actual place designed for student projects [11:31] but words and what actually happens have a very low correlation [11:31] so it would seem [11:32] havent seen the baker basement lab yet [11:32] is it key/card access? [11:32] still, there'll be some ventillation fitted to the basement room [11:32] key [11:32] we'll be getting keys [11:32] right ok [11:32] well some ventilation is better than none [11:33] quite [11:33] is all the stuff in the new lab now? [11:39] we can't get in until monday as it's currently occupied by the bulk superconductivity group [11:39] Need to put the heating on after they're done. :) [11:40] edmoore: oh right [11:40] i'm leaving the day after tomorrow [11:40] ok, not to worry [11:40] though we will probs be in on friday [11:40] edmoore: ie. tomorrow? [11:41] yes [11:41] could you let me know what times you'll be in when you know? [11:41] would like to see the new lab [11:42] probably from 10ish tomorrow [11:42] okay cool [11:52] bbl [12:09] MikeMc68_Mobile (~MikeMc68_@212.183.140.19) joined #highaltitude. [12:10] howdy [12:13] MikeMc68_Mobile (MikeMc68_@212.183.140.19) left #highaltitude. [12:21] edmoore (~ed@chu-gw-a.churchillcambridge.co.uk) left irc: Quit: edmoore [12:25] pschulz01: hey there [12:26] Laurenceb (~laurence@host81-154-84-43.range81-154.btcentralplus.com) left irc: Ping timeout: 252 seconds [12:49] Hiena (~Hiena@81.93.195.181.datatrans.hu) left irc: Quit: -=Got bored from the net. Gone blowing up things.=- [13:12] juxta: Hello.. sorry for the delay. Still here? [13:13] yup [13:13] how's things? [13:13] Do you have any 'plans/notes' on the antenna that you are using? [13:13] juxta: I'm good.. hacking on xlog. [13:14] which antenna pschulz01? the magnetic mount on the roof of the car? [13:14] or the yagi? [13:14] both :) [13:15] Was there a reason you had the whip off? [13:15] ah - 2 antennas on that mount [13:15] one is a 1/4 wave, which is good when the balloon is up [13:15] I'm also interested in the yagi as well [13:16] the other is a 1/4 wave stacked with a 1/2 wave, more gain, but not so good when the balloon is up high [13:16] (the black one you saw me put up is the 1/4 + 1/2 stacked) [13:16] Ok. How high does it get? [13:16] it's more about the angle of elevation to the balloon [13:16] the 1/4 wave has maximum gain at say 45 degrees [13:17] the other one would be much lower [13:17] Is range an issue? [13:17] when the balloon is down low it is [13:17] at the time i was swapping antennas it was at about 1.5km [13:17] (and about 50km away) [13:18] so only 1 degree of elevation or so [13:18] I sent you an email with some yagi stuff in it, that simple little design in the image is really nifty [13:18] you could make it out of anything really [13:18] once the balloon is up high range isnt really a problem [13:19] That would be great. [13:32] Nick change: juxta -> juxta|afk [13:32] Hiena (~Hiena@81.93.195.181.datatrans.hu) joined #highaltitude. [13:37] grummund (~grummund@unaffiliated/grummund) joined #highaltitude. [13:40] Hiena (~Hiena@81.93.195.181.datatrans.hu) left irc: Quit: -=Got bored from the net. Gone blowing up things.=- [13:41] Nick change: pschulz01 -> pschulz01|afk [14:18] Nick change: juxta|afk -> juxta [14:30] Simon-MPFH (~simon@81.187.157.65) joined #highaltitude. [14:49] Hiena (~Hiena@81.93.195.181.datatrans.hu) joined #highaltitude. [15:17] juxta (fourtytwo@ppp118-210-108-197.lns20.adl2.internode.on.net) left irc: Ping timeout: 268 seconds [15:21] N900evil (~Speedevil@tor/regular/SpeedEvil) left irc: Ping timeout: 245 seconds [15:36] Mikemc68_mobile (~Mikemc68_@genkt-058-035.t-mobile.co.uk) joined #highaltitude. [15:38] Mikemc68_mobile2 (~Mikemc68_@genkt-050-064.t-mobile.co.uk) joined #highaltitude. [15:38] Hi [15:40] Mikemc68_mobile (~Mikemc68_@genkt-058-035.t-mobile.co.uk) left irc: Ping timeout: 240 seconds [15:41] N900evil (~Speedevil@tor/regular/SpeedEvil) joined #highaltitude. [15:42] Anything happening this weekend? [15:46] Mikemc68_mobile2 (~Mikemc68_@genkt-050-064.t-mobile.co.uk) left irc: Quit: Bye [15:47] Mikemc68_mobile (~Mikemc68_@genkt-050-064.t-mobile.co.uk) joined #highaltitude. [16:00] Mikemc68_mobile (~Mikemc68_@genkt-050-064.t-mobile.co.uk) left irc: Read error: Connection reset by peer [16:04] Hiena (~Hiena@81.93.195.181.datatrans.hu) left irc: Quit: -=Got bored from the net. Gone blowing up things.=- [16:05] Hiena (~Hiena@81.93.195.181.datatrans.hu) joined #highaltitude. [16:11] edmoore (~ed@2002:80e8:e4b7:9:21e:52ff:fe70:c253) joined #highaltitude. [16:27] edmoore (~ed@2002:80e8:e4b7:9:21e:52ff:fe70:c253) left irc: Remote host closed the connection [16:27] edmoore (~ed@2002:80e8:fad3:9:21b:63ff:feac:4133) joined #highaltitude. [16:39] edmoore (~ed@2002:80e8:fad3:9:21b:63ff:feac:4133) left irc: Remote host closed the connection [16:39] edmoore (~ed@2002:80e8:fad3:9:21b:63ff:feac:4133) joined #highaltitude. [16:41] Simon-MPFH (~simon@81.187.157.65) left irc: Quit: Leaving [16:44] b3cft (~abrock@nat/yahoo/x-jcosecqmynkloamm) left irc: Ping timeout: 248 seconds [16:45] haloa [16:45] edmoore (~ed@2002:80e8:fad3:9:21b:63ff:feac:4133) left irc: Quit: edmoore [16:48] DanielRichman (~DanielRic@unaffiliated/danielrichman) joined #highaltitude. [16:48] Nick change: MikeMc68 -> EarthshineDesign [16:49] edmoore (~ed@pluto.trinhall.cam.ac.uk) joined #highaltitude. [17:03] jasonb (~jasonb@adsl-66-124-73-250.dsl.sntc01.pacbell.net) left irc: Ping timeout: 276 seconds [17:12] So: the plan was to build a slimjim on a piece of 2m+ PVC rigid white pipe with 1.5mm tinned copper wire - however, I spoke to someone today who reckoned that any length of unsupported PVC > 1m long, or perhaps 1.5 if moutned vertically, wouldn't cope very well and would deform very nastily over the course of a couple of summers and winters; he recommended using wood (dielectric properties or smth.?). Is this a real issue (anten [17:12] na will be mounted on roof); is wood a viable alternative/any other material suggestions? [17:13] bamboo works [17:13] well [17:13] paint it [17:13] also you're helping the pandas [17:13] the 7 day prediction is messing around in france :( [17:16] sbasuita are you in France ? [17:16] EarthshineDesign, nope [17:16] EarthshineDesign, i'm in southeast england [17:16] ok [17:16] same as me then [17:17] EarthshineDesign, http://www.srcf.ucam.org/cuspaceflight/hourly-predictions/ <--- this is set to the parameters of our ALIEN payload [17:17] (camb launch) [17:17] I have a ~7m bamboo mast - works well [17:18] (made out of 3 sections of 2.4m or so bamboo [17:19] 7metre s? [17:19] To go on the payloadf ? [17:20] jasonb (~jasonb@m360536d0.tmodns.net) joined #highaltitude. [17:20] EarthshineDesign: no - to pick up 3G [17:20] SpeedEvil, cool, ok. What supplier? [17:20] Focus. [17:20] Pick up 3G on what ? [17:21] Or homebase, I forget. [17:21] explain [17:21] 3G modem from vodafone [17:21] which gets no signal in my house. [17:21] Ahh I see [17:22] heh [17:24] vodafone usually have good coverage [17:25] SpeedEvil, by what means did you attach the 2.4m pieces together? Also - the painting is to insulate it, right? Any spray paint will do? [17:33] DanielRichman: no - weatherproofing. [17:33] DanielRichman: Baler twine [17:33] I have a V2 which is wired together. [17:34] But for under a fiver or so... [17:34] ok [17:53] Mike_IrssiTest (~mmcrobert@bb-87-80-136-184.ukonline.co.uk) joined #highaltitude. [17:54] Mike_IrssiTest (~mmcrobert@bb-87-80-136-184.ukonline.co.uk) left irc: Client Quit [17:55] EarthshineDesign (~mikeymc@bb-87-80-136-184.ukonline.co.uk) left irc: Quit: Bye bye ! [17:55] SpeedEvil, no hits on focus' or wickes' website for "bamboo" - but it did show a few "bamboo canes" which look like they're not the right stuff. (unless http://www.wickes.co.uk/Bamboo-Canes/invt/187767 is the stuff you meant. [17:55] EarthshineDesign (~mmcrobert@bb-87-80-136-184.ukonline.co.uk) joined #highaltitude. [17:55] B&Q does however show http://www.diy.com/diy/jsp/bq/nav.jsp?action=detail&fh_secondid=9426462&fh_view_size=10&fh_location=//catalog01/en_GB&fh_search=bamboo&fh_eds=ß&fh_refview=search&ts=1268329931533&isSearch=true [17:56] I think I might use a bamboo mast but construct the antenna itself on a piece of pvc then attach the two together [17:56] test [17:56] pong! [17:56] ping randomskk [17:56] Ordinary bamboo canes - sold for propping up plants and general garden purposes [17:56] Lashed together with string [17:57] Ah, ok. I will have a look in the shop [17:57] they are very light for their strength. [17:57] All garden centres will have them [17:57] Couldn't you disassemble the bundles and then 'stagger' them so that you don't need any actual connections [17:57] ie move half of each bundle up by 0.5m and re-bundle [17:58] they were overlapped by ~0.7m or so IIRC [17:58] And tied together [17:58] 1 cane, then 3, then 5 [17:58] Ok [17:59] Selecting uncracked canes is a good plan [17:59] and paint helps it last several more years [18:00] I see [18:00] jasonb (~jasonb@m360536d0.tmodns.net) left irc: Ping timeout: 260 seconds [18:04] test [18:20] DanielRichman (~DanielRic@unaffiliated/danielrichman) left irc: Quit: Leaving [18:21] DanielRichman (~DanielRic@unaffiliated/danielrichman) joined #highaltitude. [18:21] DanielRichman (~DanielRic@unaffiliated/danielrichman) left irc: Client Quit [18:26] anyone know how to use irssi ? [18:26] jasonb (~jasonb@dsl027-180-244.sfo1.dsl.speakeasy.net) joined #highaltitude. [18:29] JohnTed (unstable@glitchinthe.net) joined #highaltitude. [18:29] http://www.beyond62.com/2010/01/21/high-altitude-photography/ [18:29] Anyone rig up a picavet ever? [18:29] EarthshineDesign (~mmcrobert@bb-87-80-136-184.ukonline.co.uk) left irc: Quit: leaving [18:34] mmcroberts1 (~mmcrobert@bb-87-80-136-184.ukonline.co.uk) joined #highaltitude. [18:35] Nick change: mmcroberts1 -> EarthshineDesign [18:38] hello [18:45] EarthshineDesign: what was it you wanted to know re irssi? [18:46] scripts [18:46] i load a script but nothing seems to happen [18:46] which script? [18:46] nickcolor.pl [18:46] actually now i see the nick's are different colours [18:46] except your one was yellow and then next message was black [18:47] it will be yellow if i include your nick, to alert you that the message was for you [18:47] as follows [18:47] hi EarthshineDesign [18:47] ahh [18:47] no that stayed black [18:47] EarthshineDesign: hi [18:47] that worked [18:48] sorry yeh, your name has to be said at the start of the message [18:48] EarthshineDesign: hi [18:48] works [18:48] hi EarthshineDesign [18:48] doesnt [18:49] k [18:49] thanks [18:49] np :) [18:49] ping edmoore [18:49] Jasperw (~jasperw@client-81-100-30-42.cht-bng-015.adsl.virginmedia.net) joined #highaltitude. [18:50] hmm [18:50] a script called nicklist.pl isn't working [18:51] script load nicklist.pl [18:51] doesnt work? [18:51] oh hang on i need to set up parameters first [18:51] it's documented in the source code [18:52] ah right [18:52] is there an easy way to change the background colour ? [18:53] of the chat window? [18:53] yeah [18:53] hmm not that i know of actually [18:54] never looked through, i prefer black [18:55] weird [18:56] grrr [18:59] hmm [18:59] http://www.irssi.org/themes [18:59] admittedly *most* have dark backgrounds [18:59] ok i changed a theme that is meant to give a dark background [18:59] Jasperw (~jasperw@client-81-100-30-42.cht-bng-015.adsl.virginmedia.net) left irc: Ping timeout: 276 seconds [18:59] it changed the text to green but the background is still white [18:59] how odd [19:00] Action: SpeedEvil is using xchat and pidgin [19:00] unless it's a dodgy theme file [19:00] yeh could well be [19:01] could try another one, then "set theme xyz" [19:02] hmm [19:02] any good? [19:02] tried another one - fonts changed - background the same [19:02] is your default terminal background colour set to white? [19:03] ahh [19:03] dereksmith (~586b4352@gateway/web/freenode/x-aqcpjsgpukytvsrd) joined #highaltitude. [19:03] dumbass [19:03] sorted [19:04] :) [19:04] good good [19:04] DOH!! [19:04] Jasperw (~jasperw@client-81-100-30-42.cht-bng-015.adsl.virginmedia.net) joined #highaltitude. [19:05] cool [19:05] icez (~icez@unaffiliated/icez) joined #highaltitude. [19:07] can someone PM me pls [19:08] I want to see how PM's show up [19:12] thanks [19:12] no probs [19:14] SpeedEvil (~user@tor/regular/SpeedEvil) left irc: Quit: Leaving. [19:15] SpeedEvil (1000@tor/regular/SpeedEvil) joined #highaltitude. [19:18] did someone say there wa a laucnh this weekend ? [19:18] icarus III and alien are both looking to launch this weekend [19:18] weather isnt looking great afaik [19:18] cool [19:18] http://www.srcf.ucam.org/~cuspaceflight/hourly-predictions/# [19:19] that is set up for alien's payload parameters but you get the idea [19:19] are these payloads for imaging or something else ? [19:20] alien is a GCSE group from surrey [19:20] http://ukhas.org.uk/projects:alien [19:20] not sure on the aims for icarus [19:21] ok [19:22] alien def won't launch this weekend; and we're from berkshire ;) [19:22] sbasuita: hmm woops, sorry [19:23] sbasuita: not sure where i got surrey from [19:23] jonsowman, no worries ;P [19:23] sbasuita: why not this weekend? weather? [19:23] jonsowman, yep, also too short notice now anyway [19:24] yes fair enough [19:24] hopefully the weather will be better soon [19:27] Jasperw (~jasperw@client-81-100-30-42.cht-bng-015.adsl.virginmedia.net) left irc: Ping timeout: 265 seconds [19:28] Simon-MPFH (~simon@phantom.mpfh.co.uk) joined #highaltitude. [19:32] Jasperw (~jasperw@client-81-100-30-42.cht-bng-015.adsl.virginmedia.net) joined #highaltitude. [19:37] LazyLeopard (~irc-clien@chocky.demon.co.uk) joined #highaltitude. [19:38] hi rick [19:38] Hiya [19:38] New nick. [19:41] yeah [19:41] i might change it again [19:41] lol [19:41] hmm now scripts in irsso are not running at all [19:41] irssi [19:42] Irssi: Unknown command: scripts [19:42] Long nick is loooooong [19:42] /script load xyz.pl [19:42] im pretty sure /run xyz.pl works too [19:42] did that [19:43] unknown command [19:43] hmm weird, that should work [19:43] "script" not "scripts" yes? [19:43] yeah [19:43] very odd [19:44] try restarting irssi maybe? [19:44] k brb [19:44] ok [19:44] EarthshineDesign (~mmcrobert@bb-87-80-136-184.ukonline.co.uk) left irc: Quit: leaving [19:46] mmcroberts1 (~mmcrobert@bb-87-80-136-184.ukonline.co.uk) joined #highaltitude. [19:46] DanielRichman (~DanielRic@unaffiliated/danielrichman) joined #highaltitude. [19:47] unknown command script [19:47] wtf [19:47] thats really weird [19:47] DanielRichman (~DanielRic@unaffiliated/danielrichman) left irc: Client Quit [19:47] what does just typing "/script" give? [19:48] same [19:48] odd [19:49] perl problem [19:50] man ln [19:50] oops wrong window [19:50] Irssi: Error loading module perl/core: dlopen(/opt/local/lib/irssi/modules/libperl_core.so, 10): image not found [19:50] Nick change: mmcroberts1 -> Earthshine [19:51] Earthshine: what OS? [19:52] osx [19:52] ah, i see [19:52] output of "/load perl" please? [19:52] Jasperw (~jasperw@client-81-100-30-42.cht-bng-015.adsl.virginmedia.net) left irc: Ping timeout: 265 seconds [19:52] as above [19:52] Irssi: Error loading module perl/core: dlopen(/opt/local/lib/irssi/modules/libperl_core.so, 10): image not found [19:53] how did you install irssi [19:53] macports [19:53] i think i need to set --with-perl=yes [19:53] ok you need to uninstall it and reinstall with perl [19:53] yeah [19:53] "sudo port install irssi + perl" [19:53] k brb [19:54] Earthshine (~mmcrobert@bb-87-80-136-184.ukonline.co.uk) left irc: Quit: leaving [19:54] ok [19:54] G8DSU (~chatzilla@cpc3-mort4-0-0-cust192.croy.cable.virginmedia.com) joined #highaltitude. [19:57] earthshine (~mmcrobert@bb-87-80-136-184.ukonline.co.uk) joined #highaltitude. [19:57] success [19:57] cool [19:58] earthshine: good good [19:58] that's better [19:58] :) [19:58] ok dinner time [19:58] laters [19:58] cya [20:12] JohnTed (unstable@glitchinthe.net) left #highaltitude. [20:12] Laurenceb (~laurence@host81-154-84-43.range81-154.btcentralplus.com) joined #highaltitude. [20:12] hi [20:12] hi [20:12] hi Laurenceb [20:12] Action: SpeedEvil triwes tor emember what he meant to point laurenceb to. [20:13] Action: Laurenceb has been very busy with other stuff [20:13] building work etc [20:13] http://slashdot.org/ [20:13] ah yes [20:13] moved on to pcb layout now, but havent got too far [20:13] the ps3 controller reportedly has gyro+mag+accel [20:14] Action: SpeedEvil has been playing with 2000W 50KHz transmitter. [20:14] nice [20:14] I'm getting confused by the silabs transceiver [20:14] (AKA induction hob) [20:14] impedance matching [20:14] interesting [20:14] it seems the HopeRF moduls on sparkfun are utter fail [20:15] This is the one that you think you can get it to do sampling? [20:15] no thtats the chipcon [20:15] I have chipcon eval modules... another thing I need to get round to doing [20:15] edmoore: ping [20:15] Im going for silabs as for uavs you dont need hundereds of Km range and crazy RF stuff going on [20:16] ah [20:16] I see [20:16] but the impedance matching is a pain... you can use a Tx/Rx switch or have a network to do the matching [20:16] Laurenceb: why sparkfun bad? [20:17] seems the design is quite clever - going switchless doesnt cost you much [20:17] they dont have 180 degree phase imbalance on Rx negative and positive [20:17] and screwed up the Tx impedance matching network [20:17] ah [20:17] Rx its costing them 4.2dB, Tx 3 [20:18] I cant understand how they could be so stupid [20:18] they took the design thats in the datasheet descrided as minimal BOM, useful for dual antenna [20:19] then shoved an SPDT RF switch onto it [20:20] silabs AN427 has a smith chart of the Rx frontend [20:20] that's what - 7dB if you're using both [20:20] yes [20:20] So what - half the range? [20:20] but youd be being naughty to use that much power in the UK [20:20] yes [20:21] so only the Rx loss, if you dont count the fact your using excessive current [20:21] I've just done a layout for the matching network with no RF switch - from the datasheet [20:22] looks like the entire thing is 10x20mm [20:22] how much is the SF module? [20:22] with sma connector [20:22] $12.50 [20:22] not too bad. [20:22] yeah not much over buying parts from mouser [20:23] WillD_ (~56a2bed7@gateway/web/freenode/x-zbvuqlmrebbllrrn) joined #highaltitude. [20:23] the PA design is quite clever - just a NMOS fet [20:23] driven with square wave [20:23] And a filter? [20:24] yeah, but thats on the pcb [20:24] filter and impedance matching [20:25] hmm [20:25] it means you can get 100mw into 50 ohm with 3.3v supply [20:25] and also when the Tx is off its just a parasitic capacitance [20:25] I'd have thought that that would be lots over limits at 3F [20:25] so the matching network can accomodate that - so you dont lose RX performacne [20:26] apparently not with the recommended filter network [20:27] you seem to lose a bit of Tx efficency if you dont have a switch - as the RX pins in Tx mode present a resistive load [20:27] Ah. And it relies on people to actually check their designs for compliance... [20:27] but that doesnt bother me as much [20:27] yes [20:27] atm I dont have any component values for the switchless matching network [20:28] just smith charts for a network anylizer plugged into the pins that silabs provide [20:29] I've got an icom pcr1000 that could be used to check for excessive RFI [20:29] but yeah - the only advantage of the SF modules is that they are compliant [20:29] Do they actually say that? [20:31] well - providing you set the power register to the correct level [20:31] Hope RF have a test report [20:31] it seems to show compliance [20:32] it calls itself EN330-200 [20:32] ah [20:32] and was done by a German test lab [20:32] DanielRichman (~DanielRic@unaffiliated/danielrichman) joined #highaltitude. [20:33] http://www.hoperf.com/rf_fsk/rfm22.htm [20:33] Sorry for making you dig - it was just an idle thought. [20:33] lol at the RF22 IC [20:34] thats just a repackaged si4432 [20:35] Action: Laurenceb realises he doesnt properly understand smith charts [20:36] near to the circumference means the reflected wave has nearer to the same amplitude right? [20:36] RobertB (~robert@ip-109-40-128-69.web.vodafone.de) joined #highaltitude. [20:36] Action: SpeedEvil knows they are wierd circularish things. [20:36] But little else. [20:36] its just the normalised complex amplitude/phase of the reflected wave in the complex plane ? [20:36] ok :p [20:37] Never done the mathematics of RF design. [20:42] hmm the app note explains all the maths [20:42] thats good [20:43] take the reciprocal of the complex value from the chart then express it as a resistor in parallel with a cap or inductor, and thats the model for your pin [20:43] seems to be it [20:44] that's quite simple [20:44] then crunch through the network by hand/ use spice or something [20:44] until it all matches [20:44] thats the "fun" bit [20:45] Especially considering non-ideal components and PCB parasitics. [20:45] yeah [20:46] DanielRichman (~DanielRic@unaffiliated/danielrichman) left irc: Quit: Leaving [20:47] DanielRichman (~DanielRic@unaffiliated/danielrichman) joined #highaltitude. [20:47] darknesslord_ (~darknessl@189.164.13.50) joined #highaltitude. [20:51] bbl [21:00] Nick change: Jos -> jos [21:08] hey [21:09] yo [21:28] Hiena (~Hiena@81.93.195.181.datatrans.hu) left irc: Quit: -=Got bored from the net. Gone blowing up things.=- [21:31] Simon-MPFH (~simon@phantom.mpfh.co.uk) left irc: Quit: Leaving [21:43] SpeedEvil (1000@tor/regular/SpeedEvil) left irc: Quit: Leaving. [21:44] SpeedEvil (~user@tor/regular/SpeedEvil) joined #highaltitude. [21:53] N900evil (~Speedevil@tor/regular/SpeedEvil) left irc: Ping timeout: 245 seconds [21:55] DanielRichman (~DanielRic@unaffiliated/danielrichman) left irc: Ping timeout: 265 seconds [21:58] sbasuita (~sbasuita@unaffiliated/drebellion) left irc: Quit: Leaving [22:06] DoYouKnow (~c0cb88f6@gateway/web/freenode/x-vpwcxaqxppfsybvo) joined #highaltitude. [22:06] hi [22:06] hi DoYouKnow [22:06] hi jon [22:07] rjharrison (~rharrison@vpn.hgf.com) joined #highaltitude. [22:07] Evening all [22:07] evening rjh [22:07] Just been on the M0 course [22:07] hi rob [22:07] nice [22:07] how did it go [22:08] hehe like the mane DoYouKnow [22:08] hi jonsowman [22:08] Oh fine'ish [22:08] good good [22:08] WillD_ (~56a2bed7@gateway/web/freenode/x-zbvuqlmrebbllrrn) left irc: Ping timeout: 252 seconds [22:09] DanielRichman (~DanielRic@unaffiliated/danielrichman) joined #highaltitude. [22:12] rjharrison (~rharrison@vpn.hgf.com) left irc: Client Quit [22:13] hi rjharrison [22:13] oh he's gone [22:14] jcoxon (~jcoxon@92.40.86.249.sub.mbb.three.co.uk) joined #highaltitude. [22:14] hi earthshine. cool nick [22:16] :) [22:18] pschulz01|afk (~paul@ubuntu/member/pschulz01) left irc: Quit: Lost terminal [22:20] N900evil (~Speedevil@tor/regular/SpeedEvil) joined #highaltitude. [22:25] N900evil (~Speedevil@tor/regular/SpeedEvil) left irc: Ping timeout: 245 seconds [22:42] ji james [22:42] *hi [22:44] DanielRichman (~DanielRic@unaffiliated/danielrichman) left irc: Remote host closed the connection [22:46] DanielRichman (~DanielRic@unaffiliated/danielrichman) joined #highaltitude. [22:49] N900evil (~Speedevil@tor/regular/SpeedEvil) joined #highaltitude. [22:51] DanielRichman (~DanielRic@unaffiliated/danielrichman) left irc: Read error: Connection reset by peer [22:52] junderwood (~John@adsl.jcu.me.uk) left irc: Quit: Leaving [22:55] DanielRichman (~DanielRic@unaffiliated/danielrichman) joined #highaltitude. [22:56] N900evil (~Speedevil@tor/regular/SpeedEvil) left irc: Ping timeout: 245 seconds [22:56] night [23:05] DoYouKnow (~c0cb88f6@gateway/web/freenode/x-vpwcxaqxppfsybvo) left irc: Ping timeout: 252 seconds [23:09] natrium42 (~natrium@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) joined #highaltitude. [23:09] o/ [23:12] hi natrium42 [23:12] Jasperw (~jasperw@client-81-100-30-42.cht-bng-015.adsl.virginmedia.net) joined #highaltitude. [23:12] hi jon [23:12] hows you? [23:13] good & you? [23:13] yeh fine thanks :) [23:14] jcoxon (~jcoxon@92.40.86.249.sub.mbb.three.co.uk) left irc: Quit: Leaving [23:14] natrium42: so one of my friends here walked in and saw your name was like "wow are you talking to THE natrium42" [23:15] omg, i is famous [23:15] Randomskk: ? [23:15] jonsowman: phil [23:15]