XPost: rec.radio.amateur.moderated

Amateur/Ham Radio

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Any idea what this is? It looks like some kind of horn receiver or antenna
like they use to discover the cosmic background energy? Downtown Augusta Georgia

Posted: 09 Apr 2022 12:30 PM PDT https://www.reddit.com/r/amateurradio/comments/u00fqr/any_idea_what_this_is_it_looks_like_some_kind_of/

submitted by /u/grummanpikot99
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New radio day and first time using SSB. Why is voice signal showing up
below center frequency for USB on waterfall? I am missing something.

Posted: 09 Apr 2022 04:35 PM PDT https://www.reddit.com/r/amateurradio/comments/u056fl/new_radio_day_and_first_time_using_ssb_why_is/

submitted by /u/ohgeez93
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Magnetic Loop Capacitor ideas based loosely on Ciro Mazzoni. Full 40-10
meters coverage with 15ft of LMR400. TA1LSX parts (shoutout to Erhan) and a
3D printer. The 5-142 will tune a 12ft loop.

Posted: 09 Apr 2022 03:56 PM PDT https://www.reddit.com/r/amateurradio/comments/u04glt/magnetic_loop_capacitor_ideas_based_loosely_on/

submitted by /u/AH6BI
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Sunspot Activity on The Sun Is Seriously Exceeding Official Predictions

Posted: 09 Apr 2022 06:44 PM PDT https://www.reddit.com/r/amateurradio/comments/u07eec/sunspot_activity_on_the_sun_is_seriously/

submitted by /u/cbl5257
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HELP- Boiler turns on from RFI- description as first comment

Posted: 09 Apr 2022 12:27 PM PDT https://www.reddit.com/r/amateurradio/comments/u00dkm/help_boiler_turns_on_from_rfi_description_as/

submitted by /u/chas574
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New Alinco DR-735 Install

Posted: 09 Apr 2022 10:45 AM PDT https://www.reddit.com/r/amateurradio/comments/tzybwr/new_alinco_dr735_install/


Just finished installing my new Alinco in the Tacoma. I mounted the remote
head with a Ram X-Grip suction cup mount and placed the control body under
the drivers seat. I mounted two RoadPRO RPSP-15 speakers in the cubby above
the front cup holders with 3M dual lock. That stuff is seriously strong. Instead of buying the $50 Alinco remote cable, I created my own using RJ-12 connectors and CAT5. I did the same with the mic extension using a CAT5
patch cable and a coupler.
The mic is mounted with a magnetic cell phone holder I found at Walmart for less than $6. My antenna is a Larsen NMO 2/70B.

https://preview.redd.it/p6pkcencjjs81.jpg?width=3024&format=pjpg&auto=webp&s=fdc82dd3da4b76990f2544433c8e38a65f7a971a
https://preview.redd.it/h1d5ylncjjs81.jpg?width=3024&format=pjpg&auto=webp&s=90e6c33c5a461fe05b2029f4347700ae818f35ef
submitted by /u/Rakuun535
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QRP Dummy Load Problems

Posted: 09 Apr 2022 07:30 PM PDT https://www.reddit.com/r/amateurradio/comments/u0861x/qrp_dummy_load_problems/


SOLVED: /u/ArmstrongRotor suggested to remove the capacitor and that seems
to have solved the problem.
I have a 12w QRPGuys Dummy load that tests perfectly unless you put power
into the load.
It measures 50.4 ohms, and my NanoVNA and multiple radios show the SWR to
be 1:1 with under 1w of power. But once you increase the power from 1w to
5w the SWR increases immediately to 3:1.
All four 3w metal film resistors test at 198ohms and look fine. The dummy
load is connected directly to the radios and another good load that I have tests normally.
Any suggestions on how to remedy the issue? Im thinking Ill have to just replace the resistors but they seem fine by themselves.
The Load Itself submitted by /u/Baconwaffle7
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For super portable SOTA-type applications, does the IC-705 do anything
better than the Elecraft KX2?

Posted: 09 Apr 2022 02:45 PM PDT https://www.reddit.com/r/amateurradio/comments/u0334z/for_super_portable_sotatype_applications_does_the/


The 705 has the fancy display (and being a 7300 owner a familiar
interface), but it is almost triple the weight and if you don’t use a power supply will only run 5w and the KX2 does 12w with the built in battery.
My read is that the KX2 is much better for extreme portable use cases, but
not sure if there’s something I’m missing.
I use a full 100W IC-7100 for POTA where I don’t have to carry the gear
very far and a 7300 for a base station, but from what I can tell Elecraft
is the move for ultra-light portable ops.
Some of the QRP transceiver kits are at appealing price points but I worry about the quality. submitted by /u/CaptainMoronhigh
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Propagation has be great this week

Posted: 08 Apr 2022 07:11 PM PDT https://www.reddit.com/r/amateurradio/comments/tzj679/propagation_has_be_great_this_week/

submitted by /u/DC5932
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Does anyone know of any practice material for the general exam math? I'd
like to actually learn the math vs memorize the answers

Posted: 09 Apr 2022 03:29 PM PDT https://www.reddit.com/r/amateurradio/comments/u03y9q/does_anyone_know_of_any_practice_material_for_the/


I am currently studying for my general upgrade and am having trouble with
the math. I dont really want to just memorize the answers and would like to maybe find some worksheets or something to practice some of the math
involved. Anybody know if something like this exists? submitted by
/u/spast1c
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Getting started with RF amplifier circuits

Posted: 09 Apr 2022 11:28 AM PDT https://www.reddit.com/r/amateurradio/comments/tzz6gz/getting_started_with_rf_amplifier_circuits/


I have my Amateur Extra license, a degree in EE, but didn’t take the path
of RF circuits in college. I stuck with antenna theory and design- give me
a Smith Chart and I’m at home.
I’d like to learn how to design and build some basic RF circuits,
eventually leading up to my own power amplifiers. I don’t know where to get started. I purchased the ARRL Handbook series of books but honestly it’s a little too hard to follow.
What would be some good books to start with? I don’t need basic circuit theory. But need help with transistors, FETs, etc. Starting with basic circuits, going to more advanced ones.
And what type of equipment do I need, other than some breadboards,
soldering iron, variable power supply? Do I need a signal generator and a
scope as well? submitted by /u/BenDerisgrate
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music on 40m ssb

Posted: 09 Apr 2022 08:57 PM PDT https://www.reddit.com/r/amateurradio/comments/u09kkp/music_on_40m_ssb/


Pretty new to the hobby, Just an interesting and kind of odd thing I heard tonight trying to get in with an hf net someone was playing various songs
over the net controller. Any go to way to hear around this kind of thing?
Still recording it right now, if anyone is interested Ill post it somewhere later. Pretty interesting recording. submitted by /u/NodakTwoBravo
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Anyone know why talkabout is not able to be enabled on my Xpr7580? I am following the steps given in the user manual but the radio wont let me
trasmit nor enable the talkabout so it can be used as a simple 2 way radio. Thanks for your help!

Posted: 09 Apr 2022 02:27 PM PDT https://www.reddit.com/r/amateurradio/comments/u02qal/anyone_know_why_talkabout_is_not_able_to_be/

submitted by /u/Typical-Barber-8369
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dudestar won't connect. I have updated host files and I'd files.

Posted: 09 Apr 2022 07:52 PM PDT https://www.reddit.com/r/amateurradio/comments/u08jg0/dudestar_wont_connect_i_have_updated_host_files/

submitted by /u/marty87f
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Wouxun KG-UV980p unlock software?

Posted: 09 Apr 2022 03:54 PM PDT https://www.reddit.com/r/amateurradio/comments/u04fi8/wouxun_kguv980p_unlock_software/


I know it exists, but the usual link is down and apparently has been for a while. Does anyone happen to have this software and would be willing to
share it? Supposedly, the 950p software works too. submitted by /u/InevitableYam7
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Need help understanding impedence matches for VHF Yagis

Posted: 09 Apr 2022 03:09 PM PDT https://www.reddit.com/r/amateurradio/comments/u03kis/need_help_understanding_impedence_matches_for_vhf/


I’ve seen quite a bit for VHF Yagis out there; but more so calculators and the math for 3, 4, and 7 element designs.
Can someone help me understand how to calculate what my hairpin match
should look like?
Im not trying to get overly complicated, but I bought some Fair Rite 61s so
I could wrap my wire connected to my RG-58 around it, except they’re SUPER tiny. It looks like it’s more feasible to simply make a hairpin match. However, figuring out (without test equipment) what the sizing and gauge of wire needs to be is hard to figure out. I’m somewhat of a beginner, so any advice is helpful. Thank you submitted by /u/Haemmerli22
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Can anyone ID where this photocopy is from? Chapter TWENTY....This MUST be
ARRL handbook with 20 plus chapters right? Can anyone help with year? Post April 1993 but pre 1999 when I moved to apartment and my radios ended up in
a box in storage.

Posted: 09 Apr 2022 05:56 AM PDT https://www.reddit.com/r/amateurradio/comments/tzsn2q/can_anyone_id_where_this_photocopy_is_from/

submitted by /u/RubberTireBurnout
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20M mag loop with radials/groundplane?

Posted: 09 Apr 2022 07:33 AM PDT https://www.reddit.com/r/amateurradio/comments/tzuf82/20m_mag_loop_with_radialsgroundplane/


At some point in the near future, Im planning to build a mag loop antenna
for 20 meters. My intent is to use 1/2 in. Copper pipe with a total length
of 16 ft. on the main loop. Several sources have suggested that the
addition of radials or a mesh ground plane would substantially improve the performance, but are rather scant on any details.
So...does anyone have any experience with this, to share any hints and tips
for that part of the antenna such as what spacing to have between the loop
& radials? submitted by /u/dereks777
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Icom ID 4100 car mounts?

Posted: 09 Apr 2022 12:08 PM PDT https://www.reddit.com/r/amateurradio/comments/tzzzkn/icom_id_4100_car_mounts/


I when I receive this radio, I’m going to separate the head and mount it in my 2014 Ford Fiesta. I need some answers and recommendations: What is the
best mounting options and hardware? I think I’d like a CD slot mount or a vent mount.
Is the mic connector the same as The ID 5100? I’ve already got an extension cable.
Any other recommendations are greatly appreciated. 73s submitted by /u/Saxman31
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resonant frequency

Posted: 09 Apr 2022 08:07 AM PDT https://www.reddit.com/r/amateurradio/comments/tzv3bf/resonant_frequency/


Hey Im trying to solve this question
What is the Q of a parallel RLC circuit, if it is resonant at 7.125 MHz, L
is 10.1 microhenrys and R is 100 ohms?
So Q=(2 × 3.14 x 7125000 x 0.0000101)/100 Which gives me 4.52 but it says
the answer is 0.221 What am I doing wrong? submitted by /u/SugoiRyu69
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DX-World Poll - For / Against - Russia / Belarus

Posted: 09 Apr 2022 03:12 PM PDT https://www.reddit.com/r/amateurradio/comments/u03m9a/dxworld_poll_for_against_russia_belarus/


"As nobody else has constructed a poll / survey about this red hot topic, DX-World is doing it": https://www.dx-world.net/poll-for-against-russia-belarus/ submitted by /u/w9km
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Sanity check me please

Posted: 08 Apr 2022 06:28 PM PDT https://www.reddit.com/r/amateurradio/comments/tzie53/sanity_check_me_please/

submitted by /u/Academic-Associate91
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Is the FCC ULS Search not working for anyone or just me?

Posted: 09 Apr 2022 07:26 AM PDT https://www.reddit.com/r/amateurradio/comments/tzuale/is_the_fcc_uls_search_not_working_for_anyone_or/


Im trying to download my official license but I get a Failure of Web Server bridge error every time I try to download my license. I even get that
message when trying to lookup a call sign. Is this happening for everyone
or just me? submitted by /u/sgstiffler
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Packet radio - is this still a thing ?

Posted: 08 Apr 2022 04:22 PM PDT https://www.reddit.com/r/amateurradio/comments/tzg4tu/packet_radio_is_this_still_a_thing/


I remember reading old articles about it.
Is this still alive ? If so, what systems are popular and which transfer protocols and rates have caught on ? submitted by /u/Onsi_Reni
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Has anyone ever got the Lab599 TX-500 to run FT8

Posted: 09 Apr 2022 07:58 AM PDT https://www.reddit.com/r/amateurradio/comments/tzuwzq/has_anyone_ever_got_the_lab599_tx500_to_run_ft8/


…using a Digirig and the WSJT-X software? I have combed through the
internet, used the recommended settings from the groups.io group and even emailed Denis at Digirig but cannot get it to work. Wondering now if my
Digirig and/or the supplied cables are defective. Any ideas? submitted
by /u/CranesVIII
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