The Position Light: Amtrak Electrification Primer position-light.blogspot.com/2026/09/amtr... #TractionPowerNetwork #25hz #PRR
Amtrak Electrification Primer
While this blog is dedicated to railroad signaling, I occasionally veer into the command and control of railroad traction power systems beca...
position-light.blogspot.com
October 14, 2026 at 3:23 AM
The Position Light: Amtrak Electrification Primer position-light.blogspot.com/2026/09/amtr... #TractionPowerNetwork #25hz #PRR
Fluke TC01C 25Hz iSee Mobile Thermal Camera for iOS Smartphones (USB-C) starting at $298.12
Choose:
iOS — $298.12: amazon.com/dp/B0CYT1553Q
Android — $310.25: amazon.com/dp/B0C9H54GLX
iOS USB-C — $370.99: amazon.com/dp/B0FVDS8JX5
Choose:
iOS — $298.12: amazon.com/dp/B0CYT1553Q
Android — $310.25: amazon.com/dp/B0C9H54GLX
iOS USB-C — $370.99: amazon.com/dp/B0FVDS8JX5
October 6, 2026 at 10:36 AM
Fluke TC01C 25Hz iSee Mobile Thermal Camera for iOS Smartphones (USB-C) starting at $298.12
Choose:
iOS — $298.12: amazon.com/dp/B0CYT1553Q
Android — $310.25: amazon.com/dp/B0C9H54GLX
iOS USB-C — $370.99: amazon.com/dp/B0FVDS8JX5
Choose:
iOS — $298.12: amazon.com/dp/B0CYT1553Q
Android — $310.25: amazon.com/dp/B0C9H54GLX
iOS USB-C — $370.99: amazon.com/dp/B0FVDS8JX5
The overhead lighting in the Odeon is flickering at 25hz. I don't like that
September 23, 2026 at 1:02 PM
The overhead lighting in the Odeon is flickering at 25hz. I don't like that
Fluke TC01C 25Hz - iSee Mobile Thermal Camera 25% Off #Ad link.amazon/B00Id2blG
September 18, 2026 at 6:19 AM
Fluke TC01C 25Hz - iSee Mobile Thermal Camera 25% Off #Ad link.amazon/B00Id2blG
So, *another* french Olitec modem, slightny newer SelfMemory 56000 after a factory resest decided that it was okay wiht the 55 volt rms 25hz signal from the GrandStream and started printing `RING` in the serial console!
I remove some of the good I have to say about it. It generates a 20 or 25hz signal, which my old OLITEC modem (French made!) does not understand
It cannot automatically pickup a call as, is, you need to use a ATA command. :-/
It cannot automatically pickup a call as, is, you need to use a ATA command. :-/
This is a useless information for most people, but I am very happy about the ringer circuit in a GrandStream HT813. It seems very happy to ring an old mechanical french analog phone, which expect anything between like 50 to 90 volts AC?
Does a better job than the phone output of the Freebox Ultra.
Does a better job than the phone output of the Freebox Ultra.
September 18, 2026 at 10:03 AM
So, *another* french Olitec modem, slightny newer SelfMemory 56000 after a factory resest decided that it was okay wiht the 55 volt rms 25hz signal from the GrandStream and started printing `RING` in the serial console!
I remove some of the good I have to say about it. It generates a 20 or 25hz signal, which my old OLITEC modem (French made!) does not understand
It cannot automatically pickup a call as, is, you need to use a ATA command. :-/
It cannot automatically pickup a call as, is, you need to use a ATA command. :-/
This is a useless information for most people, but I am very happy about the ringer circuit in a GrandStream HT813. It seems very happy to ring an old mechanical french analog phone, which expect anything between like 50 to 90 volts AC?
Does a better job than the phone output of the Freebox Ultra.
Does a better job than the phone output of the Freebox Ultra.
September 16, 2026 at 7:21 PM
I remove some of the good I have to say about it. It generates a 20 or 25hz signal, which my old OLITEC modem (French made!) does not understand
It cannot automatically pickup a call as, is, you need to use a ATA command. :-/
It cannot automatically pickup a call as, is, you need to use a ATA command. :-/
Fluke TC01C 25Hz iSee Mobile Thermal Camera for iOS Smartphones (USB-C) only $397.49 (Reg $529.99)
https://www.amazon.com/gp/product/B0FVDS8JX5?smid=ATVPDKIKX0DER&th=1&linkCode=ll2&tag=blueskysh-20
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September 13, 2026 at 7:07 AM
Fluke TC01C 25Hz iSee Mobile Thermal Camera for iOS Smartphones (USB-C) only $397.49 (Reg $529.99)
https://www.amazon.com/gp/product/B0FVDS8JX5?smid=ATVPDKIKX0DER&th=1&linkCode=ll2&tag=blueskysh-20
https://www.amazon.com/gp/product/B0FVDS8JX5?smid=ATVPDKIKX0DER&th=1&linkCode=ll2&tag=blueskysh-20
In 1989, Navy Cold War hydrophones picked up a whale calling at 52Hz, far above the 15-25Hz range other whales use. Tracked every year since, its call has never been answered by another of its kind. A signal broadcast at a frequency nobody else speaks.
mugenradio.com
mugenradio.com
September 10, 2026 at 5:06 PM
In 1989, Navy Cold War hydrophones picked up a whale calling at 52Hz, far above the 15-25Hz range other whales use. Tracked every year since, its call has never been answered by another of its kind. A signal broadcast at a frequency nobody else speaks.
mugenradio.com
mugenradio.com
Meet STROBE 1176HP: a 1500W IP66 LED strobe for big skies and bigger beats. 392×2W CW LEDs, RGB pixel control, 180° tilt and 0–25Hz strobe punch. Ready to flash? color-imagination.co... #StageLighting
September 5, 2026 at 4:55 PM
Meet STROBE 1176HP: a 1500W IP66 LED strobe for big skies and bigger beats. 392×2W CW LEDs, RGB pixel control, 180° tilt and 0–25Hz strobe punch. Ready to flash? color-imagination.co... #StageLighting
STROBE 1176HP: 1500W IP66 LED strobe moving head with pixel RGB, 180° tilt and 0–25Hz effects. Made for festivals, concerts and weather with attitude. color-imagination.co... #StageLighting #LEDStrobe
September 2, 2026 at 4:19 PM
STROBE 1176HP: 1500W IP66 LED strobe moving head with pixel RGB, 180° tilt and 0–25Hz effects. Made for festivals, concerts and weather with attitude. color-imagination.co... #StageLighting #LEDStrobe
We found a beta-band (15-25Hz) right frontoparietal network that was over-represented in the resting state in individuals who had recently taken psychedelics, primarily in the first week after the dose.
August 27, 2026 at 10:11 PM
We found a beta-band (15-25Hz) right frontoparietal network that was over-represented in the resting state in individuals who had recently taken psychedelics, primarily in the first week after the dose.
Fluke TC01C 25Hz iSee Mobile Thermal Camera for iOS Smartphones (USB-C) starting at $350.73
https://www.amazon.com/gp/product/B0CYT1553Q?smid=ATVPDKIKX0DER&th=1&linkCode=ll2&tag=bluesky0d2-20
https://www.amazon.com/gp/product/B0CYT1553Q?smid=ATVPDKIKX0DER&th=1&linkCode=ll2&tag=bluesky0d2-20
August 26, 2026 at 3:49 PM
Fluke TC01C 25Hz iSee Mobile Thermal Camera for iOS Smartphones (USB-C) starting at $350.73
https://www.amazon.com/gp/product/B0CYT1553Q?smid=ATVPDKIKX0DER&th=1&linkCode=ll2&tag=bluesky0d2-20
https://www.amazon.com/gp/product/B0CYT1553Q?smid=ATVPDKIKX0DER&th=1&linkCode=ll2&tag=bluesky0d2-20
What stops the GNSS? Jamming? There should be plenty of constellation coverage.
I’m also curious about the cost factor - I’ve built streaming telemetry devices with 25Hz GNSS and 6-axis IMU for under $75 (with sub-250mm hAcc and 1.3 pDOP). I’ll admit there may be aspects I’m ignorant of, however.
I’m also curious about the cost factor - I’ve built streaming telemetry devices with 25Hz GNSS and 6-axis IMU for under $75 (with sub-250mm hAcc and 1.3 pDOP). I’ll admit there may be aspects I’m ignorant of, however.
August 26, 2026 at 12:36 AM
What stops the GNSS? Jamming? There should be plenty of constellation coverage.
I’m also curious about the cost factor - I’ve built streaming telemetry devices with 25Hz GNSS and 6-axis IMU for under $75 (with sub-250mm hAcc and 1.3 pDOP). I’ll admit there may be aspects I’m ignorant of, however.
I’m also curious about the cost factor - I’ve built streaming telemetry devices with 25Hz GNSS and 6-axis IMU for under $75 (with sub-250mm hAcc and 1.3 pDOP). I’ll admit there may be aspects I’m ignorant of, however.
It's time... to cry it's SO GOOD www.youtube.com/watch?v=25hZ...
Episode 8 Prism Launch Star - Mario Kart World
YouTube video by BlueToad
www.youtube.com
August 25, 2026 at 3:57 AM
It's time... to cry it's SO GOOD www.youtube.com/watch?v=25hZ...
>Obviously it doesn't look choppy to us.
Because you'd never seen a framerate over 25Hz. A kid who grew up on 100+Hz frame rates will see our analog rates as choppy.
I do think your hypothesis might play some role. Also the serial nature of video and phosphor fade plays some role. 24Hz cinema...
Because you'd never seen a framerate over 25Hz. A kid who grew up on 100+Hz frame rates will see our analog rates as choppy.
I do think your hypothesis might play some role. Also the serial nature of video and phosphor fade plays some role. 24Hz cinema...
August 20, 2026 at 6:10 PM
>Obviously it doesn't look choppy to us.
Because you'd never seen a framerate over 25Hz. A kid who grew up on 100+Hz frame rates will see our analog rates as choppy.
I do think your hypothesis might play some role. Also the serial nature of video and phosphor fade plays some role. 24Hz cinema...
Because you'd never seen a framerate over 25Hz. A kid who grew up on 100+Hz frame rates will see our analog rates as choppy.
I do think your hypothesis might play some role. Also the serial nature of video and phosphor fade plays some role. 24Hz cinema...
Fluke TC01C 25Hz iSee Mobile Thermal Camera for iOS Smartphones (USB-C) only $408.09
https://www.amazon.com/gp/product/B0FVDS8JX5?smid=ATVPDKIKX0DER&th=1&linkCode=ll2&tag=bluesky0d2-20
https://www.amazon.com/gp/product/B0FVDS8JX5?smid=ATVPDKIKX0DER&th=1&linkCode=ll2&tag=bluesky0d2-20
August 16, 2026 at 10:14 PM
Fluke TC01C 25Hz iSee Mobile Thermal Camera for iOS Smartphones (USB-C) only $408.09
https://www.amazon.com/gp/product/B0FVDS8JX5?smid=ATVPDKIKX0DER&th=1&linkCode=ll2&tag=bluesky0d2-20
https://www.amazon.com/gp/product/B0FVDS8JX5?smid=ATVPDKIKX0DER&th=1&linkCode=ll2&tag=bluesky0d2-20
Fluke TC01C 25Hz - iSee Mobile Thermal Camera for iOS Smartphones Type C, Temperature Range up to 1022°F only $408.09
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August 16, 2026 at 10:48 AM
Fluke TC01C 25Hz - iSee Mobile Thermal Camera for iOS Smartphones Type C, Temperature Range up to 1022°F only $408.09
https://www.amazon.com/gp/product/B0FVDS8JX5?smid=ATVPDKIKX0DER&th=1&linkCode=ll2&tag=bluesky0d2-20
https://www.amazon.com/gp/product/B0FVDS8JX5?smid=ATVPDKIKX0DER&th=1&linkCode=ll2&tag=bluesky0d2-20
built purrbox: three sliders (cat size, room temp, cat mood) drive a Web Audio purr modeled on the real ~25Hz laryngeal pulse — cold cats shiver, hot cats pant, grumpy cats growl, ecstatic cats trill.
built it 🎉 — https://purrbox.bisks.net
(give the deploy a minute to go live)
built it 🎉 — https://purrbox.bisks.net
(give the deploy a minute to go live)
August 14, 2026 at 9:48 PM
built purrbox: three sliders (cat size, room temp, cat mood) drive a Web Audio purr modeled on the real ~25Hz laryngeal pulse — cold cats shiver, hot cats pant, grumpy cats growl, ecstatic cats trill.
built it 🎉 — https://purrbox.bisks.net
(give the deploy a minute to go live)
built it 🎉 — https://purrbox.bisks.net
(give the deploy a minute to go live)
16-2/3Hz, 16.7Hz, 25Hz, 50Hz, and 60Hz. It's really fascinating. I find it interesting that AC frequencies change mid-span in some sections simply because the overhead catenary lines were electrified at different times in the course of history. e.g just east of NYC Penn Station, in Queens:
August 5, 2026 at 10:21 PM
16-2/3Hz, 16.7Hz, 25Hz, 50Hz, and 60Hz. It's really fascinating. I find it interesting that AC frequencies change mid-span in some sections simply because the overhead catenary lines were electrified at different times in the course of history. e.g just east of NYC Penn Station, in Queens:
Floor height would seem to be a problem with FLIRTs. Even the British units are a solid foot short of level boarding here. MN really dropped the ball not ordering some of the M8s with 25hz transformers.
Today the other option would be ACS64s retrofitted with DC-link tech and an Airo APV-like car.
Today the other option would be ACS64s retrofitted with DC-link tech and an Airo APV-like car.
August 5, 2026 at 9:46 PM
Floor height would seem to be a problem with FLIRTs. Even the British units are a solid foot short of level boarding here. MN really dropped the ball not ordering some of the M8s with 25hz transformers.
Today the other option would be ACS64s retrofitted with DC-link tech and an Airo APV-like car.
Today the other option would be ACS64s retrofitted with DC-link tech and an Airo APV-like car.
I will now finally be able to play Duck Hunt on the NES. Also will be hooking it up to my PC for online multiplayer games as a Standard Definition CRT monitor with 25Hz runs smoother than an OLED with 144Hz
July 30, 2026 at 12:01 PM
I will now finally be able to play Duck Hunt on the NES. Also will be hooking it up to my PC for online multiplayer games as a Standard Definition CRT monitor with 25Hz runs smoother than an OLED with 144Hz
Objectively 11kV AC 25hz is better for long distance…but 3kV DC was more familiar to them and certainly would’ve been more sustainable than extending the 3rd rail
July 29, 2026 at 11:53 PM
Objectively 11kV AC 25hz is better for long distance…but 3kV DC was more familiar to them and certainly would’ve been more sustainable than extending the 3rd rail
That's a good point, what voltage and frequency would they have used to electrify their network? Supposedly CUT's 3kVDC was initially conceived as a model for wider-spread electrification. 11kVAC 25hz would be a possibility, and later studies contemplated commercial frequency power.
July 29, 2026 at 10:10 PM
That's a good point, what voltage and frequency would they have used to electrify their network? Supposedly CUT's 3kVDC was initially conceived as a model for wider-spread electrification. 11kVAC 25hz would be a possibility, and later studies contemplated commercial frequency power.
Morteveille, a work in progress top-down run and gun game for #AtariST computers youtu.be/xs-EGeXPQ2M?... #atari
Atari STf vs STE 25Hz Smooth Scrolling Engine - Morteveille [Homebrew Tech Demo]
A side-by-side technical comparison of the custom 25Hz (2 VBL) multidirectional scrolling engine built for Morteveille, an upcoming top-down run 'n gun for the Atari 1040 STf and STE (1MB RAM…
youtu.be
July 6, 2026 at 3:33 PM
Morteveille, a work in progress top-down run and gun game for #AtariST computers youtu.be/xs-EGeXPQ2M?... #atari
HIKMICRO Cámara térmica Mini2Plus V2 - iOS/Android, cámara termográfica con resolución IR de 256x192, SuperIR 512x384, Enfoque Manual, 25Hz, USB-C/Lightning (soporta iPhone 15/16/17)
📉 Baja de 256,49 a 243,66€
💶 Ahorro: 12,83€ (5%)
🔗 https://amzlink.to/az0NgofMC2vvE
📉 Baja de 256,49 a 243,66€
💶 Ahorro: 12,83€ (5%)
🔗 https://amzlink.to/az0NgofMC2vvE
March 14, 2026 at 7:27 AM
HIKMICRO Cámara térmica Mini2Plus V2 - iOS/Android, cámara termográfica con resolución IR de 256x192, SuperIR 512x384, Enfoque Manual, 25Hz, USB-C/Lightning (soporta iPhone 15/16/17)
📉 Baja de 256,49 a 243,66€
💶 Ahorro: 12,83€ (5%)
🔗 https://amzlink.to/az0NgofMC2vvE
📉 Baja de 256,49 a 243,66€
💶 Ahorro: 12,83€ (5%)
🔗 https://amzlink.to/az0NgofMC2vvE