Gary @N8DMT
@n8dmt.mastodon.radio.ap.brid.gy
Amateur Radio Extra, Maker, Product developer, Wireless/RF/Antenna guru / electronics consultant, LabVIEW, RTL-SDR, ADALM Pluto, GNU Radio, FCC testing. Location […]
🌉 bridged from https://mastodon.radio/@n8dmt on the fediverse by https://fed.brid.gy/
🌉 bridged from https://mastodon.radio/@n8dmt on the fediverse by https://fed.brid.gy/
US Coast Guard aircraft executing a search just south of Key West Florida. Additional assets joining in now.
December 6, 2025 at 1:22 PM
US Coast Guard aircraft executing a search just south of Key West Florida. Additional assets joining in now.
What is inside a Mini-Circuits ZFL-2000 RF Amplifier? Had a few minutes to take a quick look inside one of these RF Amps. Didn’t learn much, and was surprised to see a fully-cased (pins) amplifier module inside. Would take a lot more effort to disassemble […]
[Original post on mastodon.radio]
[Original post on mastodon.radio]
December 5, 2025 at 1:59 PM
What is inside a Mini-Circuits ZFL-2000 RF Amplifier? Had a few minutes to take a quick look inside one of these RF Amps. Didn’t learn much, and was surprised to see a fully-cased (pins) amplifier module inside. Would take a lot more effort to disassemble […]
[Original post on mastodon.radio]
[Original post on mastodon.radio]
Reposted by Gary @N8DMT
4 General upgrades and 3 new Technicians. Not bad for an after Thanksgiving session. #HamRadio.
November 29, 2025 at 7:57 PM
4 General upgrades and 3 new Technicians. Not bad for an after Thanksgiving session. #HamRadio.
Reposted by Gary @N8DMT
(For those that missed this headline... Anyway, I am middle fingering the economy)
CNBC: Americans are holding onto devices longer than ever and it’s costing the economy
CNBC: Americans are holding onto devices longer than ever and it’s costing the economy
November 28, 2025 at 6:18 PM
(For those that missed this headline... Anyway, I am middle fingering the economy)
CNBC: Americans are holding onto devices longer than ever and it’s costing the economy
CNBC: Americans are holding onto devices longer than ever and it’s costing the economy
Looking over Black Friday announcements from HRO and DX Engineering yields an interesting takeaway: today’s “super-specials” look a lot like last year’s everyday prices for many items. Anyone else seeing this too? #hamradio #blackfriday
November 28, 2025 at 4:12 PM
Looking over Black Friday announcements from HRO and DX Engineering yields an interesting takeaway: today’s “super-specials” look a lot like last year’s everyday prices for many items. Anyone else seeing this too? #hamradio #blackfriday
POTA Questions: If 2 hams activate the same POTA park with each having a 10 band radio station and only contact each other, does this count as a valid activation? (…with logs submitted, etc.) Does a contact on another mode, but same band count as a separate contact? I.e., 10 bands, 2 modes each […]
Original post on mastodon.radio
mastodon.radio
November 23, 2025 at 7:44 PM
POTA Questions: If 2 hams activate the same POTA park with each having a 10 band radio station and only contact each other, does this count as a valid activation? (…with logs submitted, etc.) Does a contact on another mode, but same band count as a separate contact? I.e., 10 bands, 2 modes each […]
November 23, 2025 at 4:02 PM
Reposted by Gary @N8DMT
Mountain biking for donuts. #BikeTooter
November 23, 2025 at 3:37 PM
Mountain biking for donuts. #BikeTooter
RF equipment setup complete for first low-power 2.4 GHz test using Remote SDR and Pluto SDR. Waiting for the afternoon to find/retrieve the second RaspberryPi-5 computer needed for the second transceiver controller. (Have moved multiple times with re-boxing […]
[Original post on mastodon.radio]
[Original post on mastodon.radio]
November 23, 2025 at 3:01 PM
RF equipment setup complete for first low-power 2.4 GHz test using Remote SDR and Pluto SDR. Waiting for the afternoon to find/retrieve the second RaspberryPi-5 computer needed for the second transceiver controller. (Have moved multiple times with re-boxing […]
[Original post on mastodon.radio]
[Original post on mastodon.radio]
Reposted by Gary @N8DMT
(don't believe in premonitions, but whatever my brain picked up... it was cheaper to buy some disasters supplies, i.e. beans, rice, olive oil, N95 masks, gloves that doing anything else, and that was it).
November 21, 2025 at 9:33 PM
(don't believe in premonitions, but whatever my brain picked up... it was cheaper to buy some disasters supplies, i.e. beans, rice, olive oil, N95 masks, gloves that doing anything else, and that was it).
Lower cost & performance, but more bands than the ICOM IC-905? Have been exploring how to inexpensively get on VHF/UHF/SHF bands (2m and up) and believe the ADALM Pluto and RaspberryPi5 with Remote SDR SW will support that. Many challenges to achieve all 8 RF bands to 5.9 GHz, but with […]
Original post on mastodon.radio
mastodon.radio
November 21, 2025 at 3:52 PM
Lower cost & performance, but more bands than the ICOM IC-905? Have been exploring how to inexpensively get on VHF/UHF/SHF bands (2m and up) and believe the ADALM Pluto and RaspberryPi5 with Remote SDR SW will support that. Many challenges to achieve all 8 RF bands to 5.9 GHz, but with […]
Gentle Reminder: Looking for a break from the challenges of life in 2025? Check out Blogs.Radio for great reminders that adding a little radio and electronics to your topics list can positively influence your mood. Or at least distract you for a-bit… Hope you enjoy this site as much as I do […]
Original post on mastodon.radio
mastodon.radio
November 18, 2025 at 1:58 AM
Gentle Reminder: Looking for a break from the challenges of life in 2025? Check out Blogs.Radio for great reminders that adding a little radio and electronics to your topics list can positively influence your mood. Or at least distract you for a-bit… Hope you enjoy this site as much as I do […]
Slow Work Day: Let’s sort ferrite! Made a quick ferrite material sorter using NanoVNA-H4 and a two-turn test loop. Ended up finding at least four material types. Now labeled in separate bags and ready for (easier) future use!
#hamradio #emiemc #sortalltheparts
#hamradio #emiemc #sortalltheparts
November 17, 2025 at 8:50 PM
Slow Work Day: Let’s sort ferrite! Made a quick ferrite material sorter using NanoVNA-H4 and a two-turn test loop. Ended up finding at least four material types. Now labeled in separate bags and ready for (easier) future use!
#hamradio #emiemc #sortalltheparts
#hamradio #emiemc #sortalltheparts
Have you seen video on the DIY capacity hat for a vertical antenna whip? Link below for one ham’s approach. Have purchased some 24” zip ties and found the lab stock of copper tape. Interested to see how this works on my 17’ SS-17 whip antenna!
With the cooler […]
[Original post on mastodon.radio]
With the cooler […]
[Original post on mastodon.radio]
November 14, 2025 at 9:19 PM
Have you seen video on the DIY capacity hat for a vertical antenna whip? Link below for one ham’s approach. Have purchased some 24” zip ties and found the lab stock of copper tape. Interested to see how this works on my 17’ SS-17 whip antenna!
With the cooler […]
[Original post on mastodon.radio]
With the cooler […]
[Original post on mastodon.radio]
I’m sure there is a project in here somewhere: Parts for an experimental ground isolator for a 3/8-24” vertical antenna mounting system. The box goes in between the ground spike and radials/coax-feed/vertical-whip. The switch will open or close the ground […]
[Original post on mastodon.radio]
[Original post on mastodon.radio]
November 12, 2025 at 8:44 PM
I’m sure there is a project in here somewhere: Parts for an experimental ground isolator for a 3/8-24” vertical antenna mounting system. The box goes in between the ground spike and radials/coax-feed/vertical-whip. The switch will open or close the ground […]
[Original post on mastodon.radio]
[Original post on mastodon.radio]
Reposted by Gary @N8DMT
I love that Elecraft let me do my own warranty repair on my PX3 panadapter. They agreed that a part was broken and offered me an RMA. I asked if I could replace it myself, and they just sent me the part. This is so refreshing a change from our disposable, no user-serviceable parts inside general […]
Original post on social.makerforums.info
social.makerforums.info
November 11, 2025 at 10:38 PM
I love that Elecraft let me do my own warranty repair on my PX3 panadapter. They agreed that a part was broken and offered me an RMA. I asked if I could replace it myself, and they just sent me the part. This is so refreshing a change from our disposable, no user-serviceable parts inside general […]
DIY RF Comb Generator for less than $1.00? After evaluating the mil-spec Herotek comb generator module and Pluto SDR clock source combination, decided to try out a low cost alternative for generating combs. With an on-hand SI5351A clock source, added two […]
[Original post on mastodon.radio]
[Original post on mastodon.radio]
November 10, 2025 at 3:32 PM
DIY RF Comb Generator for less than $1.00? After evaluating the mil-spec Herotek comb generator module and Pluto SDR clock source combination, decided to try out a low cost alternative for generating combs. With an on-hand SI5351A clock source, added two […]
[Original post on mastodon.radio]
[Original post on mastodon.radio]
Reposted by Gary @N8DMT
It turns out that not using a crap Ethernet cable for the last 2 meters is the difference between ~80 Mbps at the desktop and 1 Gbps at the desktop.
November 9, 2025 at 3:27 PM
It turns out that not using a crap Ethernet cable for the last 2 meters is the difference between ~80 Mbps at the desktop and 1 Gbps at the desktop.
Finished up testing of what looked like an RF amplifier module but was really a comb generator. TLDR: It works! Now have picket-fence RF signals! Details in two posts over at the qsl.net blog site. #hamradio #testequipment […]
[Original post on mastodon.radio]
[Original post on mastodon.radio]
November 8, 2025 at 4:06 PM
Finished up testing of what looked like an RF amplifier module but was really a comb generator. TLDR: It works! Now have picket-fence RF signals! Details in two posts over at the qsl.net blog site. #hamradio #testequipment […]
[Original post on mastodon.radio]
[Original post on mastodon.radio]
Getting the lab organized a-bit more: Printed out a data sheet for a pair of Narda RF couplers. Have both couplers back in the same storage package again. What is the RF Geek equivalent of the old hammer-nail saying?
When all you have are RF couplers […]
[Original post on mastodon.radio]
When all you have are RF couplers […]
[Original post on mastodon.radio]
November 6, 2025 at 9:22 PM
Getting the lab organized a-bit more: Printed out a data sheet for a pair of Narda RF couplers. Have both couplers back in the same storage package again. What is the RF Geek equivalent of the old hammer-nail saying?
When all you have are RF couplers […]
[Original post on mastodon.radio]
When all you have are RF couplers […]
[Original post on mastodon.radio]
Random RF Component Find #308: Herotek GCA640-258 RF comb generator. Was stashed in one of the garage lab boxes. Needs cleaning! This appears to be a 640 MHz input comb generator that will output multiples of that frequency up to ~ 18 GHz. Includes a […]
[Original post on mastodon.radio]
[Original post on mastodon.radio]
November 4, 2025 at 9:36 PM
Random RF Component Find #308: Herotek GCA640-258 RF comb generator. Was stashed in one of the garage lab boxes. Needs cleaning! This appears to be a 640 MHz input comb generator that will output multiples of that frequency up to ~ 18 GHz. Includes a […]
[Original post on mastodon.radio]
[Original post on mastodon.radio]
Reposted by Gary @N8DMT
Bring back BeOS style iconography
November 3, 2025 at 4:38 PM
Bring back BeOS style iconography
Reposted by Gary @N8DMT
It's my fediversary! Three years ago today I said goodbye to several hundred thousand followers at the nazi bar and joined this community. No regrets! Thanks for making me want to stick around :)
November 4, 2025 at 12:25 PM
It's my fediversary! Three years ago today I said goodbye to several hundred thousand followers at the nazi bar and joined this community. No regrets! Thanks for making me want to stick around :)
@kr1st Looks like a lot of fun! Was part of a walkie-talkie design group in years past and have great appreciation for the effort level (and many subsystem interactions during integration and operation). This is the exciting phase - proposing features and making tradeoffs. They may hit the “too […]
Original post on mastodon.radio
mastodon.radio
November 3, 2025 at 9:31 PM
@kr1st Looks like a lot of fun! Was part of a walkie-talkie design group in years past and have great appreciation for the effort level (and many subsystem interactions during integration and operation). This is the exciting phase - proposing features and making tradeoffs. They may hit the “too […]