# Latest **URL:** https://community.airframes.io/latest.md [Latest](https://community.airframes.io/latest.md) · [Categories](https://community.airframes.io/categories.md) · [Tags](https://community.airframes.io/tags.md) --- ## [Welcome to the Airframes Community Forum!](https://community.airframes.io/t/welcome-to-the-airframes-community-forum/7)
**Author:** [@system](https://community.airframes.io/u/system)\ **Replies:** 0\ **Last updated:** [March 13, 2023, 7:12pm UTC](https://community.airframes.io/t/welcome-to-the-airframes-community-forum/7 "2023-03-13T19:12:38Z")
I welcome you to the Airframes Community Forum. This is not only a place for Airframes members and feeders to gather, chat, and get help, but also for Airwaves and other tracking communities. We will try not to be excess… --- ## [Cavity Filters are Available for all Aviation frequencies as well as other Goodliness](https://community.airframes.io/t/cavity-filters-are-available-for-all-aviation-frequencies-as-well-as-other-goodliness/217)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 0\ **Last updated:** [September 6, 2026, 5:45am UTC](https://community.airframes.io/t/cavity-filters-are-available-for-all-aviation-frequencies-as-well-as-other-goodliness/217 "2026-09-06T05:45:09Z")
We have Sonde, 1090’s APRS, and specialized WiFi cavity filters available. --- ## [8 RF Connector Care Myths You Need to Know](https://community.airframes.io/t/8-rf-connector-care-myths-you-need-to-know/215)
**Author:** [@ewesterlaak](https://community.airframes.io/u/ewesterlaak)\ **Replies:** 0\ **Last updated:** [July 29, 2026, 3:56pm UTC](https://community.airframes.io/t/8-rf-connector-care-myths-you-need-to-know/215 "2026-07-29T15:56:30Z")
Interesting blog post about connector myths from manufacturer Mini-Circuits. --- ## [Message lag on Airframes](https://community.airframes.io/t/message-lag-on-airframes/214)
**Author:** [@peanut65](https://community.airframes.io/u/peanut65)\ **Replies:** 0\ **Last updated:** [July 22, 2026, 8:33am UTC](https://community.airframes.io/t/message-lag-on-airframes/214 "2026-07-22T08:33:45Z")
I have been using Airframes search and API for several years, feeding for more than two. Recently it has become apparent that there is a delay in processing some message sources: that delay is increasing over time, and f… --- ## [How to use API to get messages for a flight?](https://community.airframes.io/t/how-to-use-api-to-get-messages-for-a-flight/211)
**Author:** [@KovyJacob](https://community.airframes.io/u/KovyJacob)\ **Replies:** 5\ **Last updated:** [May 26, 2026, 1:13am UTC](https://community.airframes.io/t/how-to-use-api-to-get-messages-for-a-flight/211 "2026-05-26T01:13:41Z")
Hello, Can someone help me with the API? I am having trouble getting it working, I am trying to either get all messages for a certain flight, or get all general messages and sift through them myself, but I am unable to … --- ## [Messages not updating / No map displaying A/C](https://community.airframes.io/t/messages-not-updating-no-map-displaying-a-c/210)
**Author:** [@ccc79](https://community.airframes.io/u/ccc79)\ **Replies:** 0\ **Last updated:** [May 12, 2026, 6:12pm UTC](https://community.airframes.io/t/messages-not-updating-no-map-displaying-a-c/210 "2026-05-12T18:12:42Z")
Messages not updated or positions on map. Platform Rasberry pi 4 Operating System Trixie SDR RTL-SDR Filters Unknown Antenna DPD Airband Outdoor Feeder Client dumpvdl2 Activity Messages 134,132 La… --- ## [Lothar of the Hill Peoples SDR Topology - amp\>filter or filter\>amp Roundup](https://community.airframes.io/t/lothar-of-the-hill-peoples-sdr-topology-amp-filter-or-filter-amp-roundup/122)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 6\ **Last updated:** [December 4, 2025, 3:01am UTC](https://community.airframes.io/t/lothar-of-the-hill-peoples-sdr-topology-amp-filter-or-filter-amp-roundup/122 "2025-12-04T03:01:40Z")
Here is a work in progress on “what’s inside the stick”. I will be adding and expanding this to include stand-alone LNAs and other useful goodies. If you have a chance to open up any dongles not listed, please do send m… --- ## [Call signs on tbg.airframes](https://community.airframes.io/t/call-signs-on-tbg-airframes/204)
**Author:** [@thebaldgeek](https://community.airframes.io/u/thebaldgeek)\ **Replies:** 1\ **Last updated:** [July 1, 2025, 3:06am UTC](https://community.airframes.io/t/call-signs-on-tbg-airframes/204 "2025-07-01T03:06:49Z")
I’ve posted a few thoughts on my blog about call signs in ACARS messages and how I display them on the website. It’s an oddly ‘continuous’ topic it seems. I’ve been yelled at to totally remove them from my site, “they t… --- ## [Growing list of UAV ICAO's on 'trackmap'](https://community.airframes.io/t/growing-list-of-uav-icaos-on-trackmap/203)
**Author:** [@thebaldgeek](https://community.airframes.io/u/thebaldgeek)\ **Replies:** 0\ **Last updated:** [June 27, 2025, 3:09pm UTC](https://community.airframes.io/t/growing-list-of-uav-icaos-on-trackmap/203 "2025-06-27T15:09:35Z")
The community (mostly on X, one or two via BlueSky - don’t judge me, the truth is, X has, by far, the most active and vibrant avgeek community by a huge margin) has really stepped up and kept me on my UAV toes and the li… --- ## [Heard Messages count not updating](https://community.airframes.io/t/heard-messages-count-not-updating/197)
**Author:** [@herren](https://community.airframes.io/u/herren)\ **Replies:** 1\ **Last updated:** [June 25, 2025, 2:06pm UTC](https://community.airframes.io/t/heard-messages-count-not-updating/197 "2025-06-25T14:06:38Z")
(please move if this is the incorrect forum category) tl;dr – Ground station message count on Airframes.io web UI stopped updating & displayed “No recent messages found.” Decoder changed from dumpvdl2 to vdlm2dec, now re… --- ## [Discovery Dish RTLSDR-Blog L-Band ACARS](https://community.airframes.io/t/discovery-dish-rtlsdr-blog-l-band-acars/181)
**Author:** [@thebaldgeek](https://community.airframes.io/u/thebaldgeek)\ **Replies:** 6\ **Last updated:** [May 7, 2025, 6:42pm UTC](https://community.airframes.io/t/discovery-dish-rtlsdr-blog-l-band-acars/181 "2025-05-07T18:42:13Z")
Quick ‘mini review’ of the Discovery Dish with L-Band ACARS feed. You can see the Crowdsupply campaign here. Myself and a few others backed it from day zero (or close to it). Took a few more months than expected for … --- ## [978 UAT Cavity filters are available](https://community.airframes.io/t/978-uat-cavity-filters-are-available/156)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 2\ **Last updated:** [January 28, 2025, 10:07pm UTC](https://community.airframes.io/t/978-uat-cavity-filters-are-available/156 "2025-01-28T22:07:30Z")
Go to Discord and sign up soon! --- ## [Armchair RF Surveys UPDATED Aug 2024](https://community.airframes.io/t/armchair-rf-surveys-updated-aug-2024/155)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 0\ **Last updated:** [May 26, 2024, 10:25am UTC](https://community.airframes.io/t/armchair-rf-surveys-updated-aug-2024/155 "2024-05-26T10:25:02Z")
Reference material fo discovering your RF and antenna environment. Lothars Armchaair RF Survey.pdf (437.7 KB) --- ## [Iridium arinc622 decoding](https://community.airframes.io/t/iridium-arinc622-decoding/163)
**Author:** [@thebaldgeek](https://community.airframes.io/u/thebaldgeek)\ **Replies:** 0\ **Last updated:** [July 15, 2024, 1:00am UTC](https://community.airframes.io/t/iridium-arinc622-decoding/163 "2024-07-15T01:00:30Z")
Started using libacars to decode Iridium messages and it makes a big difference to that mode. I feel that by bringing the ‘human readability’ of this mode into line with the other decoders that use it, Jaero, dumpvdl2 a… --- ## [Air Band Cavity Filters](https://community.airframes.io/t/air-band-cavity-filters/166)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 1\ **Last updated:** [August 1, 2024, 2:14am UTC](https://community.airframes.io/t/air-band-cavity-filters/166 "2024-08-01T02:14:44Z")
Continuing the discussion from Cavity Filters in General: Preliminaries are done on the Air Band filter. I’ll be getting a few pre-production samples soon. So far the specs are pretty good. Pass 118-136 with less than 2… --- ## [Cavity Filters in General](https://community.airframes.io/t/cavity-filters-in-general/164)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 2\ **Last updated:** [July 31, 2024, 10:27pm UTC](https://community.airframes.io/t/cavity-filters-in-general/164 "2024-07-31T22:27:49Z")
I’ve been getting DMs and emails asking me something to the effect of “\*\*Lothar, what’s up with your recent cavity filter monomania? \*\*” Several things really: KevinE leading me down MOAR rabbit holes! He better not l… --- ## [Website user guide tbg.airframes.io](https://community.airframes.io/t/website-user-guide-tbg-airframes-io/159)
**Author:** [@thebaldgeek](https://community.airframes.io/u/thebaldgeek)\ **Replies:** 1\ **Last updated:** [July 14, 2024, 4:25am UTC](https://community.airframes.io/t/website-user-guide-tbg-airframes-io/159 "2024-07-14T04:25:53Z")
Massive shoutout and huge heaps of THANK-YOU to airframes.io for hosting my site! Post updated 12th Feb 2025. Updated the map page with the new acars-hub map URL. Starting with the home page: Quick breakdown on … --- ## [Inexpensive Coax Dipoles work pretty well. You can make them with common parts](https://community.airframes.io/t/inexpensive-coax-dipoles-work-pretty-well-you-can-make-them-with-common-parts/162)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 0\ **Last updated:** [July 10, 2024, 7:14am UTC](https://community.airframes.io/t/inexpensive-coax-dipoles-work-pretty-well-you-can-make-them-with-common-parts/162 "2024-07-10T07:14:46Z")
I made and tested several of these for Air Band, AIS and Sonde tracking use, since I had a free spool of Belden 1505A cable. These are low Q, so very wideband at these frequencies. Here are the details in PDF. May the Al… --- ## [Lothar of the Hill People new Cabling TL:DR Cheatsheet](https://community.airframes.io/t/lothar-of-the-hill-people-new-cabling-tl-dr-cheatsheet/153)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 0\ **Last updated:** [March 22, 2024, 6:17am UTC](https://community.airframes.io/t/lothar-of-the-hill-people-new-cabling-tl-dr-cheatsheet/153 "2024-03-22T06:17:45Z")
Lothar of the Hill Peoples expanded and revised cabling guide for SDR freaks, propeller heads, balloon trackers and L band ACARS fans Feel free to share this by links to the post. REVISION 1 3/22/2024 Lothar, What is … --- ## [1090 ADS-B Cavity Filters Custom Made, and I have a few extra. I call them Crowhreidar Filtar of the Hill People](https://community.airframes.io/t/1090-ads-b-cavity-filters-custom-made-and-i-have-a-few-extra-i-call-them-crowhreidar-filtar-of-the-hill-people/111)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 3\ **Last updated:** [April 25, 2024, 5:08am UTC](https://community.airframes.io/t/1090-ads-b-cavity-filters-custom-made-and-i-have-a-few-extra-i-call-them-crowhreidar-filtar-of-the-hill-people/111 "2024-04-25T05:08:05Z")
1090 MHz ADS-B Filter – Lothar’s FIL-1087-1093-20-01 Specification Parameter Filter Type 4 Pole Iris Coupled Cavity Resonator Passband 1087-1093 MHz Bandwidth @ -3dB 12 MHz Insertion Loss ≤1.0dB, .09 Typic… --- ## [By Request of TBG: Reposting a 1090 cabling Guide I made for Airplanes.Live](https://community.airframes.io/t/by-request-of-tbg-reposting-a-1090-cabling-guide-i-made-for-airplanes-live/149)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 1\ **Last updated:** [March 16, 2024, 2:30am UTC](https://community.airframes.io/t/by-request-of-tbg-reposting-a-1090-cabling-guide-i-made-for-airplanes-live/149 "2024-03-16T02:30:21Z")
I’ll be adding other common propellor head favorite frequencies in a future update. Lothars\_cable\_guide.pdf (433.0 KB) --- ## [SMA torque wrench](https://community.airframes.io/t/sma-torque-wrench/70)
**Author:** [@ewesterlaak](https://community.airframes.io/u/ewesterlaak)\ **Replies:** 4\ **Last updated:** [February 13, 2024, 1:56am UTC](https://community.airframes.io/t/sma-torque-wrench/70 "2024-02-13T01:56:14Z")
As your probably know SMA connectors must be fitted with the correct torque. I noticed that, on the Discord @hagbard was mentioning this with respect to the RSP1A SMA connector and his habit of using an SMA torque wrenc… --- ## [Inexpensive antennas for Air, AIS and Sonde reception](https://community.airframes.io/t/inexpensive-antennas-for-air-ais-and-sonde-reception/152)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 0\ **Last updated:** [February 4, 2024, 10:11am UTC](https://community.airframes.io/t/inexpensive-antennas-for-air-ais-and-sonde-reception/152 "2024-02-04T10:11:12Z")
Here is my latest effort to make low cost, cheap to ship antennas for the Community. These are mostly in production now, but please review and comment on the attached drawing and instructions, AREOLA TENNA R2.pdf (101.2… --- ## [I'm designing a heat sink system for SDRs - \*Hrothgar the Heat Sink\* Any interest in buying these before I start fabricating?](https://community.airframes.io/t/im-designing-a-heat-sink-system-for-sdrs-hrothgar-the-heat-sink-any-interest-in-buying-these-before-i-start-fabricating/138)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 3\ **Last updated:** [January 31, 2024, 12:59am UTC](https://community.airframes.io/t/im-designing-a-heat-sink-system-for-sdrs-hrothgar-the-heat-sink-any-interest-in-buying-these-before-i-start-fabricating/138 "2024-01-31T00:59:22Z")
poll --- ## [Lothar's TL;DR on SDR selection for AIS, ADS-B, UAT, ACARS, VDL2 and Sondes](https://community.airframes.io/t/lothars-tl-dr-on-sdr-selection-for-ais-ads-b-uat-acars-vdl2-and-sondes/150)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 1\ **Last updated:** [January 25, 2024, 4:05am UTC](https://community.airframes.io/t/lothars-tl-dr-on-sdr-selection-for-ais-ads-b-uat-acars-vdl2-and-sondes/150 "2024-01-25T04:05:15Z")
Since TBG wanted to pin this in the Airframes.io Discord server, I thought I would post this updated version of my rant here. Lothar’s general advice is: AVOID ALL plastic cased SDRs. FAVOR any SDR that uses the SKY75… --- ## [Mounting template drawings for Tallysman HC610 Iridium Antenna](https://community.airframes.io/t/mounting-template-drawings-for-tallysman-hc610-iridium-antenna/147)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 0\ **Last updated:** [January 7, 2024, 12:12am UTC](https://community.airframes.io/t/mounting-template-drawings-for-tallysman-hc610-iridium-antenna/147 "2024-01-07T00:12:16Z")
Laser print this on a transparency sheet and machining the mounting holes for this excellent antenna is easy! The antenna holes are M2,5 x 6mm max length for thin metal. HC610\_Tallysman-Model.pdf (73.7 KB) --- ## [Hrothgar the Heatsink and universal SDR mount is coming \*\*SOON\*\*](https://community.airframes.io/t/hrothgar-the-heatsink-and-universal-sdr-mount-is-coming-soon/146)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 1\ **Last updated:** [December 30, 2023, 3:06am UTC](https://community.airframes.io/t/hrothgar-the-heatsink-and-universal-sdr-mount-is-coming-soon/146 "2023-12-30T03:06:33Z")
Hrothgar Update: Here is the latest. But here is the bottom line - with this machining layout I have accommodated every SDR ppl asked for and made this pretty universal. The heatsink profile is 7" long. The baseplate is… --- ## [A simple mount for Boris the Spider and his cousins](https://community.airframes.io/t/a-simple-mount-for-boris-the-spider-and-his-cousins/144)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 0\ **Last updated:** [December 1, 2023, 2:56am UTC](https://community.airframes.io/t/a-simple-mount-for-boris-the-spider-and-his-cousins/144 "2023-12-01T02:56:16Z")
Here is a hardware store mount that requires minimal tools and work. Download the pdf to read on. Your Hill Person, Lothar. A Simple Mount for Boris the Spider 1090 MHz and his 978 MHz Cousin Uathrogar antennas.pdf (376… --- ## [Annoucing the Airframes Shop!](https://community.airframes.io/t/annoucing-the-airframes-shop/141)
**Author:** [@KevinE](https://community.airframes.io/u/KevinE)\ **Replies:** 1\ **Last updated:** [November 28, 2023, 9:39pm UTC](https://community.airframes.io/t/annoucing-the-airframes-shop/141 "2023-11-28T21:39:14Z")
Alright, so initially the Airframes Shop has a bunch of swag. So if you’re into that sort of thing, buying shirts, hoodies, hats, etc allows you to sport the brand in style, while helping us cover server costs. We are lo… --- ## [Boris The Spider. An inexpensive and easily mass produced 1090 MHz antenna kit by Lothar of the Hill People](https://community.airframes.io/t/boris-the-spider-an-inexpensive-and-easily-mass-produced-1090-mhz-antenna-kit-by-lothar-of-the-hill-people/136)
**Author:** [@Lothar\_ot\_Hill\_Peeps](https://community.airframes.io/u/Lothar_ot_Hill_Peeps)\ **Replies:** 1\ **Last updated:** [November 17, 2023, 3:26pm UTC](https://community.airframes.io/t/boris-the-spider-an-inexpensive-and-easily-mass-produced-1090-mhz-antenna-kit-by-lothar-of-the-hill-people/136 "2023-11-17T15:26:17Z")
See my latest on an antenna project here: Boris The Spider. An inexpensive and easily mass produced 1090 MHz antenna kit by Lothar of the Hill People - Hardware - Airplanes.live (beta) (airplaneslive.discourse.group) Her… [Next page](https://community.airframes.io/latest.md?page=1)