XPost: rec.radio.amateur.moderated

Amateur/Ham Radio

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Just passed my Tech exam!

Posted: 29 May 2022 08:24 AM PDT https://www.reddit.com/r/amateurradio/comments/v0dgs5/just_passed_my_tech_exam/


Signed up for a zoom exam last night through hamstudy.org and passed this morning! There were 4 fellas on the zoom call to proctor the exam and they
were a riot! Funny guys. The one fella told me once i pass my general Im required to spend $1000 on a refrigerator sized radio lol.
They asked me if i wanted to take my general while I had them on the call
too, but Im in need of some studying before then haha.
Really looking forward to getting my callsign next week hopefully!
Thanks to everyone here who encouraged me, and many thanks for sharing hamstudy.org! Great learning app that made the tech exam easy.
Yall are the greatest, and I cant wait to get on the air! submitted by /u/treskaz
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Design a rig with one purpose: maximally reliable SSB phone contacts from Georgia (USA) to Russia.

Posted: 29 May 2022 02:50 PM PDT https://www.reddit.com/r/amateurradio/comments/v0lais/design_a_rig_with_one_purpose_maximally_reliable/


What the title says - if one had a reasonable budget and wanted to design
for this purpose, how would you do it? “Maximally reliable,” of course, is a relative term; I’m also curious what you think the hard limits would
be. submitted by /u/Nink
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should I buy this rhode und Schwarz ESM 300 for 150?

Posted: 29 May 2022 05:51 AM PDT https://www.reddit.com/r/amateurradio/comments/v0ajsf/should_i_buy_this_rhode_und_schwarz_esm_300_for/

submitted by /u/schwirrwarr
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How many radios do you have and what are your favorites?

Posted: 29 May 2022 02:53 PM PDT https://www.reddit.com/r/amateurradio/comments/v0lcgm/how_many_radios_do_you_have_and_what_are_your/


I was texting a buddy to prod him to keep working on getting his license
and was about to tell him I had 5 radios, When I realized I in fact had 7 radios.
In order of acquisition Pofung/Baofeng BF8H-HP Yaesu FT-70 Realistic (radioshack) HTX-100 10m Yaesu FTM-100 Xiegu G90 Yaesu FTM-7250 (in the
mail) Yaesu FT2D (in the mail)
I really like the HTX-100 good sound reports and its got that 90s feel to
it, alas i need to work on it (caps?) as it has an odd stability problem
that recently cropped up submitted by /u/squoril
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Looking for FT-8 Sked in Maine

Posted: 29 May 2022 07:42 AM PDT https://www.reddit.com/r/amateurradio/comments/v0clpe/looking_for_ft8_sked_in_maine/


Good morning!
Ive been playing with FT-8 for the past couple of months. Its been great
with my cruddy XYL acceptable antenna. So for I worked 49 of the 50 states. Maine is the only one Im missing. I havent seen any Maine stations on FT-8 during the times that Im on the air that I have propagation to the
surrounding states and parts of Canada. If you or anyone you know is in
Maine that would be willing to try a scheduled contact to get my last
state, please let me know.
Thanks and 73,
KD6DJ submitted by /u/superdave707
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10 and 12 meter frequencies

Posted: 29 May 2022 02:37 PM PDT https://www.reddit.com/r/amateurradio/comments/v0l143/10_and_12_meter_frequencies/


The 10 and 12 meter frequencies have been dead. Any predictions on when
these will open up? submitted by /u/CountryCraftsman
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Can anyone confirm what type of antenna this is?

Posted: 29 May 2022 08:01 AM PDT https://www.reddit.com/r/amateurradio/comments/v0cza5/can_anyone_confirm_what_type_of_antenna_this_is/

submitted by /u/CanadianMusicGuy
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SK KG5NAN

Posted: 28 May 2022 07:36 PM PDT https://www.reddit.com/r/amateurradio/comments/v01wgw/sk_kg5nan/


Today my father and my Elmer passed. I am away from my radio gear, would
one of yall please do a final call for him?
Edit: Thank you all. submitted by /u/SimpleSimon3_14
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Good dual band HT antenna for mountains of eastern KY

Posted: 29 May 2022 03:25 PM PDT https://www.reddit.com/r/amateurradio/comments/v0lz8o/good_dual_band_ht_antenna_for_mountains_of/


Hey all!
Im about 15-18ish miles (as the crow flies) from the closest 2m/70cm
repeaters in my area. I live in a remote area of eastern KY in mountainous terrain. Luckily I do not live down in the bottom of a valley and have some decent elevation at my house. What would be a good HT antenna that may
allow me to reach these repeaters? I just got the Yaesu FT-5DR and I have
an older Yaesu FT-60 both with stock antennas and so far it seems I cannot
hit these repeaters.
-the other night I went to bed and had forgot to turn off my FT-60 which
was monitoring one of the repeaters. Around 2am it received a signal from
that repeater with the recorded station name and morse code message and it
woke me up from a dead sleep lol. So I feel pretty confident that i may be
able to reach these repeaters if i invest in a better antenna.
**I also have an FT-8900R with power supply and will take recommendations
on a good quad-band mobile antenna I can set up at home also**

Thanks for the info! submitted by /u/HealzFault
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I was offered ww2 portable communications receiver for 100, looks like a
nice project but is it worth it?

Posted: 29 May 2022 08:14 AM PDT https://www.reddit.com/r/amateurradio/comments/v0d9j0/i_was_offered_ww2_portable_communications/

submitted by /u/schwirrwarr
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I don't think he's ready for the exam, but he's very enthusiastic!

Posted: 28 May 2022 06:31 PM PDT https://www.reddit.com/r/amateurradio/comments/v00w02/i_dont_think_hes_ready_for_the_exam_but_hes_very/

submitted by /u/corey_m_snow
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How can I get a license without having to travel for hundreds of miles?

Posted: 29 May 2022 07:28 AM PDT https://www.reddit.com/r/amateurradio/comments/v0cc03/how_can_i_get_a_license_without_having_to_travel/


I want to do the exam but I cant go to the testing spot as its about 140
miles away. submitted by /u/godolev
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Anyone know of a reference on antenna theory (specifically dipoles) that's authoritative enough for the FDA?

Posted: 29 May 2022 08:24 AM PDT https://www.reddit.com/r/amateurradio/comments/v0dgg4/anyone_know_of_a_reference_on_antenna_theory/


Short question: if I wanted to state "the characteristic impedance of a 1/2 wave dipole is 73.1 ohms at a frequency sightly below 1/2 wavelength of the signal" and "the characteristic impedance of a folded dipole is 4x that of
the dipole", what is a good reference to cite?
Longer version: Im using amateur radio at work. Im validating a couple of electromagnetic simulation solvers to model an MRI coil. Validating solvers usually works by comparing hand-calculable results or physical testing to
your simulation output.
For a transient thermal solver, I used a steady-state problem that was calculated by hand. For an elastic mechanical solver, a colleague used a
four point bend simulation compared to a hand bending calculation and also
did a physical test.
For our EM simulation, weve been stumped. Were only using nearfield, and
most of our ideas require farfield behavior (single slit/double slit diffraction, airy disk diffraction), or eat up too much ram (dielectric
sphere scattering). We could cite physics textbooks for these.
I thought about ham radio and drew a dipole, fed it with a 73.1 ohm feed,
and ran a sweep. The lowest SWR calculated by the software occurred just
under the frequency that was slightly under 1/2 wavelength, as expected.
Then I drew an element parallel to the dipole and connected the ends and
made it a folded dipole. I upped the feed impedance by 4, and again
measured minimal VSWR frequency just below 1/2 wave.
So, to make the claim that a dipole is expected to have an impedance of 73
ohms slightly below 1/2 wavelength, and a folded dipole is expected to have
4x the impedance of a dipole, does anyone know of a reference that I can
cite? I think ARRL or equivalent international group would be sufficient. Military references have worked in the past, too. It doesnt have to be peer reviewed in "Nature" level of authority. But I cant use one of the many
blogs that so many hams write (theyre awesome! But not really
authoritative).
Im also comparing the e-field radiation pattern and polarization, but this
isnt as strong since I dont have the memory to make the simulation domain
to be 10 wavelengths in each direction, so Im only looking at the e-field
that hasnt fully resolved to a far-field pattern yet. But citing these
would be great, also. submitted by /u/Kale
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BridgeCom 50v Repeater noise

Posted: 29 May 2022 03:12 PM PDT https://www.reddit.com/r/amateurradio/comments/v0lpqy/bridgecom_50v_repeater_noise/


https://youtu.be/cnQeNyJ7MUA
Recently moved repeater to new location and started getting this horrible
tail noise.
Anybody have any ideas? Settings and details in video comment. submitted
by /u/Nobody417
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qcx mini cat control

Posted: 29 May 2022 06:01 AM PDT https://www.reddit.com/r/amateurradio/comments/v0apgt/qcx_mini_cat_control/


I just got my first radio and would like to use it in a project Im working
on. Id like a program that can take a message and automatically transmit it
in cw.
Basically Id have new messages come in from a python script and using a terminal program I could just do -cat cw 50wpm "example message1" Then when
its finished it transmits the next message
So is there anything for a rpi that can do this sort of terminal command? submitted by /u/HopefulMonk2358
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Good place to get coax?

Posted: 29 May 2022 09:40 AM PDT https://www.reddit.com/r/amateurradio/comments/v0f1mm/good_place_to_get_coax/


Anyone have a recommendation on where to get coax jumpers? Ive been putting together a list of things for an HF rig which Ill probably get from one of
the usual places (HRO, DX engineering, gigaparts) but is there somewhere
else I should look for coax? submitted by /u/janre75
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yaesu ft 950 cat control

Posted: 29 May 2022 12:22 PM PDT https://www.reddit.com/r/amateurradio/comments/v0ic05/yaesu_ft_950_cat_control/


Has anyone here ever used cat control in a yaesu hf rig? When I plug the
serial cable into the laptop my noise floor goes from 0 to s6-s7. Anyone
know of any fixes? submitted by /u/coolman1987us
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Would it make sense for me, as a 16 year old, to get my ham radio license?

Posted: 28 May 2022 09:29 AM PDT https://www.reddit.com/r/amateurradio/comments/uzqut1/would_it_make_sense_for_me_as_a_16_year_old_to/


Im mainly interested in getting a license for emergency communication,
because my area has gotten some unusually severe weather this past year.
But of course, for general communication as well it would be nice to have. I’ve read online about joining a radio club, but where i live its very
rural so we don’t have one. Any suggestions or advice is appreciated, as i have very little knowledge on the subject submitted by /u/jason-murawski
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Rack panel handle lcoation

Posted: 29 May 2022 08:51 AM PDT https://www.reddit.com/r/amateurradio/comments/v0e0ix/rack_panel_handle_lcoation/


Building a rack mount control panel and wanted to add handles to the face plate.
Does EIA-310D call out the distance and location of handles? submitted
by /u/switchdog
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When you really try to squeeze out that contact.

Posted: 28 May 2022 08:35 AM PDT https://www.reddit.com/r/amateurradio/comments/uzpror/when_you_really_try_to_squeeze_out_that_contact/

submitted by /u/JustaOrdinaryDemiGod
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I'm not a contester but this seems quite good considering how dead 10 and
15 usually are.

Posted: 28 May 2022 03:06 PM PDT https://www.reddit.com/r/amateurradio/comments/uzxa5v/im_not_a_contester_but_this_seems_quite_good/

submitted by /u/SonicResidue
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Checked into my first net and had coffee with my local club today.

Posted: 28 May 2022 09:37 AM PDT https://www.reddit.com/r/amateurradio/comments/uzr0gu/checked_into_my_first_net_and_had_coffee_with_my/


Got my license this morning and checked into the net this morning. Was
invited to coffee and met many local hams. Coming from CB and GMRS I
realize I have a TON to learn but had a very pleasant first contacts over
ham. submitted by /u/uni_gunner
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Advice for technician test tomorrow?

Posted: 28 May 2022 09:20 PM PDT https://www.reddit.com/r/amateurradio/comments/v03hs6/advice_for_technician_test_tomorrow/


Basically today I said, “f**k it” and figured I mind as well study for the tech exam as HAM radio intrigued me for many years. If people are
wondering, I studied for approx 8 hours in 2 sittings today. I went through basically every single question and section on two HAM study apps and have
been taking taking practice tests on hamexam.org and have been consistently scoring above 80%. Any advice for me tomorrow? I will be taking it
virtually. Also, can I have a piece of paper and pencil to jot down stuff
as I take the test like for unit analysis and equation related material? submitted by /u/BC_MARINO
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Any experiences on 5W on 2M/440 in Sequioa/King's Canyon National Park
(Route CA-180)?

Posted: 29 May 2022 03:18 AM PDT https://www.reddit.com/r/amateurradio/comments/v089g3/any_experiences_on_5w_on_2m440_in_sequioakings/


I am going to be visiting the park soon, and if youve been there, you know
that the canyon is remote, deep, and has Federal Lands on both sides of the valley. Little to no civilization. The valley is about a 1-2 miles wide
with around 4000 elevation gain on both sides.
Cell service is non-existent or was the last time I was there (not atypical
for western NPS sites), so Im looking for a backup incase of emergency. Has anyone had any experiences operating in the canyon along Highway 180?
Im doubtful unless Im fortunate enough to encounter someone else on simplex
on the peak (Sequoia National Park/Forest), unless there is a repeater Im
not seeing in the usual places; or possibly rangers monitoring amateur
bands. Im not finding (much, or much current information) about any amateur services that might be accessible.
A more reasonable question is if push came to shove and I came up the hill (~30-45 minutes by car) could someone on the crest of the Sequioas reach Central Valley repeaters?
Location is near: 36.7906, -118.6770. submitted by /u/satsugene
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Popped up in my news feed

Posted: 29 May 2022 06:55 AM PDT https://www.reddit.com/r/amateurradio/comments/v0borj/popped_up_in_my_news_feed/

submitted by /u/No_Cook_9092
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