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when's ur test bloody?
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Jul 20, 2014 16:55
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lol is this thread stickied?
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Jul 20, 2014 16:57
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yes 
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Jul 20, 2014 17:00
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my test is next wednesday 
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Jul 20, 2014 17:18
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jonny got me into ham a year or so ago and now that i have free time im gonna get my test done and throw a giant antenner in my yard. i mite pick up an sdr or something too.
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Jul 21, 2014 11:32
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might get a bladeRF. some guy managed to broadcast fully atsc compliant signals with it https://nuand.com/forums/viewtopic.php?f=8&t=3503 
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Jul 21, 2014 22:35
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i've got a hackrf on indefinite loan from a buddy and they are fun as HELL i havent gotten a killer app set up for it yet but we may be able to snoop on some neat poo poo in denver like ive mentioned before, colorado has the biggest amateur microwave scene in the country b/c mountains, so i'm looking forward to all that
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Jul 21, 2014 22:47
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im extremley jeals. i might end up picking one of those up because i have spare cash dollers laying around. i live pretty drat close to colorado so once i get my licence u might hear me burp and fart over the shortwaves. theres a really neat pirate radio setup for sale on CL right now. might be worth the hour drive to scoop some of that gear up.
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Jul 21, 2014 23:19
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Korean Boomhauer posted:might get a bladeRF. some guy managed to broadcast fully atsc compliant signals with it i wonder if ATSC has any sort of capture effect and whether you'd be able to do (small-scale) broadcast hijacks with an amp and a directional antenna
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Jul 22, 2014 01:55
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seriously, how the hell did i not notice there's a radio thread in the 'pos until now? here, have 4 minutes of a belligerent ranting crazy person on 14.313 "you are a liar of liars": https://www.youtube.com/watch?v=TV6vMYtUppE
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Jul 22, 2014 01:56
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atomicthumbs posted:i wonder if ATSC has any sort of capture effect and whether you'd be able to do (small-scale) broadcast hijacks with an amp and a directional antenna i suspect they just have a microwave relay that rebroadcasts the link as-is in atsc so barring any sort of security thing, you could probably go on a hilltop near the transmitter antenna and overpower the studio link
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Jul 22, 2014 05:32
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Jonny 290 posted:i suspect they just have a microwave relay that rebroadcasts the link as-is in atsc so barring any sort of security thing, you could probably go on a hilltop near the transmitter antenna and overpower the studio link http://en.wikipedia.org/wiki/Southern_Television_broadcast_interruption "At that time, the Hannington UHF television transmitter was unusual in being one of the few transmitters which rebroadcast an off-air signal received from another transmitter (Southern Television's Rowridge transmitter on the Isle of Wight), rather than being fed directly by a landline. As a consequence it was open to this kind of signal intrusion, as even a relatively low-powered transmission very close to the receiver could overwhelm its reception of the intended signal, resulting in the unauthorized transmission being amplified and rebroadcast across a far wider area." this article is fulla stuff like that http://en.wikipedia.org/wiki/Broadcast_signal_intrusion
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Jul 22, 2014 06:37
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"On September 18, 2012, the Disney Channel once again was interrupted on the Dish Network, replacing 6 minutes of Lilo & Stitch with a portion of a hardcore pornographic movie. The incident was reported to Dish Network.[26]"
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Jul 22, 2014 06:42
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Korean Boomhauer posted:"On September 18, 2012, the Disney Channel once again was interrupted on the Dish Network, replacing 6 minutes of Lilo & Stitch with a portion of a hardcore pornographic movie. The incident was reported to Dish Network.[26]" lol
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Jul 22, 2014 07:15
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Korean Boomhauer posted:might get a bladeRF. some guy managed to broadcast fully atsc compliant signals with it i have one and i had to install ubuntu to do anything with it usb 3.0 support on windows is still experimental at best, and the gnuradio stuff is all on linux
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Jul 22, 2014 07:53
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and gnuradio is poopy
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Jul 22, 2014 11:49
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Bloody posted:use an antenna range RF testing rooms are rad as hell and being told to leave your phone outside or you'll break things is some fun poo poo
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Jul 22, 2014 15:05
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c studying s: general is full of so much bullshit memorization i was not anticipating this
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Jul 23, 2014 20:50
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c radio s: skipped the exam tonight on account of i didnt wanna go and its not like i own any radios and its not like im about to buy or build any radios  radios
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Jul 24, 2014 01:49
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bloody no
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Jul 24, 2014 02:24
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and here i was lookin to get rid of an alinco 2 meter rig and a diamond f22a go take the test noob
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Jul 24, 2014 03:26
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im gonna take technician friday night but really only so I can use stuff my 600mw video transmitter and some stuff that works on ham bands also a girl overheard me at the bar last week and asked me what my ham call sign was. moron izzard fucked around with this message at 04:04 on Jul 24, 2014 |
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Jul 24, 2014 04:00
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is there really 425 unique questions in the ham technician exam or is there like a quarter of that with repeats.
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Jul 24, 2014 05:22
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A Yolo Wizard posted:is there really 425 unique questions in the ham technician exam or is there like a quarter of that with repeats. a lot of them are like mini pools, like they have 8 diff multiple choice questions all dealing with calculating the impedance of a capacitor at a certain frequency, but the numbers are diff for each one
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Jul 24, 2014 05:32
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...and a lot of them you just have to know through study, because they are sorta trick questions? example: T1A05 (A) [97.1 (e)] Which of the following is a purpose of the Amateur Radio Service rules and regulations as defined by the FCC? A. Enhancing international goodwill B. Providing inexpensive communication for local emergency organizations C. Training of operators in military radio operating procedures D. All of these choices are correct ~~ So, answer is A. Would you have got that if you didn't know beforehand?
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Jul 24, 2014 05:42
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Sniep posted:...and a lot of them you just have to know through study, because they are sorta trick questions? probably because it's def not C because lol "military radio operating procedures" and not B because lol ham radio and "inexpensive".
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Jul 24, 2014 06:07
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spankmeister posted:probably because it's def not C because lol "military radio operating procedures" and not B because lol ham radio and "inexpensive". but both of those options are frequently held strong feelings of ham operators emergency coordination is big for a lot of people who HEY ANYTHING I CAN DO TO HELP>>? and either ex-military or wishes-were lots of ham take military radio comms into the hobby
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Jul 24, 2014 06:19
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it's really easy for an eager ham student to pick D thinking "Yes! I'll help out every way ever amen!"
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Jul 24, 2014 06:23
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Sniep posted:but both of those options are frequently held strong feelings of ham operators Well yeah I know but the military thing isn't a goal, radio operations is. And emergency comms may be a thing, but it's not a goal for it to be inexpensive. the two keywords "military" and "inexpensive" is what disqualifies those answers is what I'm saying
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Jul 24, 2014 06:23
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spankmeister posted:Well yeah I know but the military thing isn't a goal, radio operations is. And emergency comms may be a thing, but it's not a goal for it to be inexpensive. the point is just study the question pools on cards here's a few more questions, and i've removed the answers in the parens until after the post, feel free to test yourself. this is from the tech pool. have a 6 question mini test. most of the questions on the test are easy as hell just saying there are gotcha ones in there or wtf? ones too. T1B06 (?) [97.301(a)] Which 23 cm frequency A. 2315 MHz B. 1296 MHz C. 3390 MHz D. 146.52 MHz ~~ T1C01 (?) [97.3(a)(11)(iii)] Which type of call sign has a single letter in both its prefix and suffix? A. Vanity B. Sequential C. Special event D. In-memoriam ~~ T1F12 (?) [97.5(b)(2)] How many persons are required to be members of a club for a club station license to be issued by the FCC? A. At least 5 B. At least 4 C. A trustee and 2 officers D. At least 2 ~~ T5C04 (?) What is the basic unit of inductance? A. The coulomb B. The farad C. The henry D. The ohm ~~ T6B11 (?) What at are the three electrodes of a field effect transistor? A. Emitter, base, and collector B. Source, gate, and drain C. Cathode, grid, and plate D. Cathode, gate, and anode ~~ T6D08 (?) Which of the following is used together with an inductor to make a tuned circuit? A. Resistor B. Zener diode C. Potentiometer D. Capacitor ~~ Answers: BCBCBD I'm sure a lot of you would ace that but just saying, if you don't ace that, go thru the question pools and just read thru them. Sniep fucked around with this message at 06:49 on Jul 24, 2014 |
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Jul 24, 2014 06:46
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voting we start the YOSPOS Ordained Society for Promotion Of Signals radio club
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Jul 24, 2014 06:57
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Sniep posted:the point is just study the question pools on cards i got all of the technical ones right but not the other 2 b/c the regulations here are different so idk
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Jul 24, 2014 07:27
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i wonder if I can just tape my callsign to my vtx instead of somehow inserting it into the video transmission edit: noone is ever going to care or find out but gently caress buying a different osd
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Jul 24, 2014 07:40
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A Yolo Wizard posted:i wonder if I can just tape my callsign to my vtx instead of somehow inserting it into the video transmission just for the 10 minute IDs? you don't have to ID in the mode you are transmitting in; hook an attiny to your transmitter's enable line and program it to send your callsign in CW. boom, compliant
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Jul 24, 2014 07:45
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scored a NMT 450 (80s analog mobile phone) base station transmitter module, fairly easy to tune for 430 and comes with a huge heat sink and dual output drivers (my grandpa suggested they were only used one at a time due to heating.) swedish made. heeavy output filtering too, hopefully possible to re-tune without too much pain i have the matching receiver already, now i can get my d-star stuff on 70cm and if i ever find a duplexer for 2 MHz splits it'll be full duplex! also found a 8 MHz split 450 MHz duplexer
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Jul 24, 2014 11:08
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Sniep posted:the point is just study the question pools on cards extra gently caress you to the "what frequency is <x> meters band" and im like 'oh okay well ill just use maths' and so i choose the maths answer but then its like "lol nope!!!" turns out these fucklords cant even do maths
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Jul 24, 2014 15:37
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Bloody posted:extra gently caress you to the "what frequency is <x> meters band" and im like 'oh okay well ill just use maths' and so i choose the maths answer but then its like "lol nope!!!" turns out these fucklords cant even do maths huh? Answer B is a perfectly valid 23cm freq
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Jul 24, 2014 16:31
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it helps a lot to learn the general idea behind the frequency allocations. like, extra test is super easy on the frequency stuff because in almost every case the correct answer is "the bottom 25 khz of the band" (btw stay out of the extra portion if you don't do 40wpm by hand. they hate slow code and they hate computers)
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Jul 24, 2014 17:30
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I usually cheat it a bit by working back from a few known frequencies/wavelengths. like i know 23 is 1300MHz ish, 70cm is 430 ish and 2m is 150 ish. So if a freq is 300 MHz i know it's about 1 meter, or if it's 2,4 GHz it should be about idk 10 to 15 cm conversely 4 meters should be 75 or so. I work out a ballpark figure like that and then usually the answers are different enough that only one of them is in that ballpark
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Jul 24, 2014 17:40
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| # ? May 26, 2024 21:12 |
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Jonny 290 posted:just for the 10 minute IDs? you don't have to ID in the mode you are transmitting in; hook an attiny to your transmitter's enable line and program it to send your callsign in CW. boom, compliant I have an audio line I don't use (who wants audio from the underside of a multirotor lol) would that be easier (id rather just make a new plug than dig into this transmitter) moron izzard fucked around with this message at 18:09 on Jul 24, 2014 |
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Jul 24, 2014 18:04
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