XPost: rec.radio.amateur.moderated

Amateur/Ham Radio

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At Second Creek. South of Tumby Bay, South Australia. Zero QRM but the
storm is making plenty of snap, crackle and pop!

Posted: 17 Dec 2021 01:49 AM PST https://www.reddit.com/r/amateurradio/comments/rie128/at_second_creek_south_of_tumby_bay_south/

submitted by /u/original_lunokhod
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High speed morse telegraphy using a straight key -- very old video, but fun

Posted: 16 Dec 2021 09:03 PM PST https://www.reddit.com/r/amateurradio/comments/ri9mfe/high_speed_morse_telegraphy_using_a_straight_key/

submitted by /u/ishmal
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On today's episode of "Worst Ways to Do Packet"

Posted: 16 Dec 2021 07:47 AM PST https://www.reddit.com/r/amateurradio/comments/rhtfrr/on_todays_episode_of_worst_ways_to_do_packet/

submitted by /u/davidbrit2
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Observations of Over-the-Horizon Radar Interference in Ham Bands Top All
Others

Posted: 16 Dec 2021 07:50 PM PST https://www.reddit.com/r/amateurradio/comments/ri8aju/observations_of_overthehorizon_radar_interference/

submitted by /u/autistic_psycho
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Fox-Hunting using Handheld equipment, Kerberos-SDR, and Chasemapper

Posted: 16 Dec 2021 07:22 PM PST https://www.reddit.com/r/amateurradio/comments/ri7rqf/foxhunting_using_handheld_equipment_kerberossdr/

submitted by /u/darksidelemm
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Is the ZS6BKW a scam?

Posted: 16 Dec 2021 06:15 PM PST https://www.reddit.com/r/amateurradio/comments/ri6ib0/is_the_zs6bkw_a_scam/


This might be long. tl;dr Are most commercially available premade antennas
a lie in a box?
I have access to some decent height trees just off my property about 150ft
from my roof (bend angle around 110deg). So Im searching for a decent
dipole adjacent antenna that will get me decent performance across 160m to
20m.
The extended double zepp is too long. Standard dipole really only works as
a monoband. End fed might work but requires some ground hardware that seems like more a pain since I have space for a dipole like antenna.
I thought I had settled on the doublet.
So I go to YouTube and look up some comparisons. Lo and behold: theres a
thing called the ZS6BKW. Advertised as the best antenna that ever lived.
The second coming of G5RV jesus. A system so unique, it required math!
But....
Im not sold. How does the math account for my unique near field conditions?
I put a cursed 10m dipole in my attic using the same math everyone else
does and the best I can get is ~3 SWR due to the hellscape of RF that is my attic. 6in metal flu, HVAC ducting, 60hz electric that goes who knows where.
So the pitch feels more like ZS6BKW: the best* antenna that you can own!
*this puppy will get you EME to KO on 20m; If you happen to have two 200ft towers in rural South Dakota 300ft away from each other with a good metal ground plane. Also, no electric service (gotta keep the noise floor tight!)
I cant figure out how they mathd away trimming. And if they didnt, isnt
that just a G5RV with extra steps? submitted by /u/MrMcFisticuffs
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Quick FTM-400XD question

Posted: 16 Dec 2021 03:13 PM PST https://www.reddit.com/r/amateurradio/comments/ri2wg1/quick_ftm400xd_question/


I have an FTM-400XD installed in a car and just want to make sure its okay
to turn off the car without manually powering off the radio first. It is currently on the ACC circuit so it is off when the car is off. submitted
by /u/LorenWard
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What would create interference on a specific VHF frequency?

Posted: 17 Dec 2021 02:19 AM PST https://www.reddit.com/r/amateurradio/comments/rieft0/what_would_create_interference_on_a_specific_vhf/


I’m a pilot and novice ham. Tonight on 123.025 I experienced heavy interference (static) when flying over one specific area. This is strange because I fly of this area regularly and am always monitoring the frequency
and have never encountered this issue. The interference was only over a
very limited area and I experienced this each time I flew by over the
course of 6 hours. There was no interference on 123.050 or 123.000. This interference was constant with no breaks. submitted by /u/Ares_83x
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(CB antenna) is this usable?

Posted: 16 Dec 2021 04:24 PM PST https://www.reddit.com/r/amateurradio/comments/ri4bo9/cb_antenna_is_this_usable/


I have two older cb antennas, one my laying around my grandmas house, and another I picked up for a couple bucks at a u-pick-it car lot. Neither fit
the modern uhf connectors on trucks cb radio. What is the best way to
connect these to my regular male uhf connector? Or am I better off spending $40-50 on a new antenna?
Pics and descriptions: https://imgur.com/a/KRRjeLm submitted by
/u/Thy_Bro
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HobbyPCB HF Kits

Posted: 17 Dec 2021 12:47 AM PST https://www.reddit.com/r/amateurradio/comments/rid6as/hobbypcb_hf_kits/

submitted by /u/Naturist02
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Silent key.

Posted: 15 Dec 2021 09:09 PM PST https://www.reddit.com/r/amateurradio/comments/rhj8d7/silent_key/


Tonight I received word that an amateur radio buddy died in the past few
days. I took him to the store a couple weeks ago. We werent particularly
close, but he Elmered me a LOT on packet radio, teletype, and plenty of
other old modes. I learned a lot from him. RIP, Mel/KJ7KK. Youll be
missed. submitted by /u/Wyowanderer
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Peanut Cannot find my DMR ID.

Posted: 16 Dec 2021 08:23 PM PST https://www.reddit.com/r/amateurradio/comments/ri8wr3/peanut_cannot_find_my_dmr_id/


I have a strange issue I’m unable to log into Brand Meister to actually change my hotspot password and I can’t use peanut because it cannot find me with my DMR ID which is a problem. I don’t know if I’ve been banned or there’s just a glitch. Any help would be appreciated submitted by /u/Dear_Public5417
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Deal on some wire

Posted: 16 Dec 2021 10:15 AM PST https://www.reddit.com/r/amateurradio/comments/rhwk3f/deal_on_some_wire/


1,000ft of 20 awg for $45

https://www.allelectronics.com/item/20rd-1000/20-gauge-stranded-hook-up-wire-red-1000-roll/1.html
I make a lot of inverted vee type antennas for QRP and radials for
verticals. Thought Id share submitted by /u/noone512
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Anytone d578uvii plus radio occasionally freezes and won't do anything
unless powered off.

Posted: 16 Dec 2021 05:32 PM PST https://www.reddit.com/r/amateurradio/comments/ri5nz4/anytone_d578uvii_plus_radio_occasionally_freezes/


I have an anytone d578uvii that Ive been using daily and it doesnt have any problems other than that it will freeze up. It will look like its just
sitting there doing nothing waiting for someone to call but in conclusion
it was actually frozen (the time on the display is stuck where it froze).
This only happens every so often. I do leave my radio on 24/7 as I use it
to communicate with friends and family. Do these radios need to be turned
off and on every now and then? My guess now with this problem is maybe so.
But Im wondering if anyone else has had this problem or something
similar. submitted by /u/__420_
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Toroidal Traps

Posted: 16 Dec 2021 11:05 AM PST https://www.reddit.com/r/amateurradio/comments/rhxmf9/toroidal_traps/


I trying to make a toroidal traps for 20/40m antenna. I struggle with high
SWR, and I dont know the reason of that. Is this even important for traps?
I use T68-6 toroids and 100pF C0G (NP0) capacitors.


SWR submitted by /u/Way8
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All I want for Christmas is ISS SSTV: its back!!! Dec 26-31

Posted: 16 Dec 2021 05:53 AM PST https://www.reddit.com/r/amateurradio/comments/rhr6t6/all_i_want_for_christmas_is_iss_sstv_its_back_dec/

submitted by /u/brianjester
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Applying High Frequency Weak-Signal Propagation (WSPR) datasets to search efforts for the lost Boeing 777 in the South Indian Ocean (MH370)

Posted: 16 Dec 2021 10:13 AM PST https://www.reddit.com/r/amateurradio/comments/rhwiqg/applying_high_frequency_weaksignal_propagation/


I have a LOT of doubt about the practicality of this, but its something new
for a change, and might lead to interesting new applications for this methodology.
Coverage on the topic from various posts on r/MH370: 2021 Jan 12 MSN 2021
Nov 9 AirlineRatings 2021 Nov 30 Richard Godfreys updated report 2021 Dec 3
BBC
See also: Richard Godfreys website
Edit: I should add; it was a German amateur radio operator who recommended WSPRnet to Godfrey as a possible new dataset. Incidentally,
fellow "Independent Group" member Victor Ianello is also a ham. submitted
by /u/whatafinebeerthisis
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Designing a pulsed system, want to make sure I'm understanding FCC rules correctly

Posted: 16 Dec 2021 05:16 AM PST https://www.reddit.com/r/amateurradio/comments/rhqjdm/designing_a_pulsed_system_want_to_make_sure_im/


I know this isnt ham radio, but I figured it wouldnt be a bad place to ask
and it appears to be within the rules of the sub. Im designing a pulsed
radar system, which I believe would be considered a "field disturbance
sensor" under the FCC rules.
FCC part 15 rules for this say the maximum average field strength is
500mV/m at 3 meters. From one of their documents, they say EIRP can be calculated as EIRP=(E_avg * d)2 / 30, where E is the field strength
(0.5V/m) and d is the distance (3m). This gives me an EIRP of
10*log10(0.075) = 18.75dBm.
Further, they specify that peak emissions are permitted to be 20dB above
the allowed average emissions, so a peak pulse power can be up to 38.75dBm. Going back through the equation, this gives me E_peak = 158 V/m which in
order to stay in the average field strength restriction gives me a maximum
duty cycle of 0.5/158 = 0.3%.
If I wanted a duty cycle of 1%, giving me a peak E of 0.5/1%=50V/m, I could
get an peak EIRP of 10*log10((50 * 3)2 / 30) = 28.75dBm.
Where am I wrong here? submitted by /u/driver1676
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Great radio day!!!

Posted: 15 Dec 2021 04:47 PM PST https://www.reddit.com/r/amateurradio/comments/rhe71e/great_radio_day/


Today I activated park k-1880 and I had a blast! I made 78 contacts, and
had my first DX contact!!!! I had a QSO with CU3HY and I4RHP! I had a lot
of fun as was able to talk to some hikers about radio as well!
How was your day? submitted by /u/Midnight_man_
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Best conduit for flat and angled underground runs

Posted: 16 Dec 2021 04:50 AM PST https://www.reddit.com/r/amateurradio/comments/rhq3g7/best_conduit_for_flat_and_angled_underground_runs/


Ive got stainless steel wire running along the bottom of my chain linked
fence. I was wanting to try this out as an experimental antenna as well as
an experimental AM BCB receiving antenna. From my house, Id like to run underground to the fenceline because I eventually want to incorporate additional feedline towards that area. I have about a 10 foot flat run, a
90 degree turn, and then a 10 foot run with a slight incline. I will also
be using direct bury rg8x (just because thats what I have on hand). What is
the best conduit to use in this situation? PVC with holes drilled every so often? Hoping to hear from someone thats had good experience with a setup
like this. Thanks!! submitted by /u/jlwlynn
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Receiving Signals from Transceiver with SDR

Posted: 16 Dec 2021 01:00 PM PST https://www.reddit.com/r/amateurradio/comments/ri03xg/receiving_signals_from_transceiver_with_sdr/


For a IoT project, I want to send data using a transceiver chip at 915MHz
and capture it using SDR.
What kind of transceiver chips do you recommend?
I’m thinking of piping the SDR output to GNU Radio to demodulate it.
Where can I find info about the specific modulation and encoding used by a transceiver chip? submitted by /u/kev1n_ma
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Polish Radio Amateur Ordered to Stop Using Falkland Islands Identifier from Antarctica

Posted: 15 Dec 2021 09:31 PM PST https://www.reddit.com/r/amateurradio/comments/rhjmch/polish_radio_amateur_ordered_to_stop_using/

submitted by /u/autistic_psycho
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How do others know whether your radio is authorized for transmitting? Once you're licensed how do you make sure your radio can legally transmit?

Posted: 15 Dec 2021 11:26 AM PST https://www.reddit.com/r/amateurradio/comments/rh746h/how_do_others_know_whether_your_radio_is/


Question in title. submitted by /u/Golossos
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USB-C rechargeable ham HT

Posted: 15 Dec 2021 09:16 PM PST https://www.reddit.com/r/amateurradio/comments/rhjcx3/usbc_rechargeable_ham_ht/


Finally found an affordable USB-C rechargable HT, kind of.
The TYT THUV88 (https://www.buytwowayradios.com/tyt-th-uv88.html) and/or
the Retevis RT85 (https://www.amazon.com/dp/B08DLFC4SX) which is basically
a clone. By themselves, these are not rechargeable by USB-C.
However, they are compatible with the Radioditty GM-30 battery, which has a USB-C charging port on the battery: https://www.amazon.com/dp/B0968DXLLX
So get a THUV88 or RT85 and a GM-30 battery and Bobs your uncle, USB-C recharging on VHF/UHF HT. submitted by /u/tint027
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IC-7300 / JTDX on Linux -> flakes out

Posted: 15 Dec 2021 07:43 PM PST https://www.reddit.com/r/amateurradio/comments/rhhm7j/ic7300_jtdx_on_linux_flakes_out/


Hi, I have a Linux laptop thats running JTDX and has successfully connected
to the IC-7300. Have been able to make a few QSOs but the connectivity to
the rigs control appears to be flaky.
I have no issues using JTDX on Windows.
Can someone share the settings you use on Linux with the IC-7300?
submitted by /u/_happydutch_
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