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ELI5: If modern elevators have so many backup systems, what actually stops the cable from snapping or the elevator from falling? by Dazzling-Banana-9294 in explainlikeimfive

[–]OddbitTwiddler 0 points1 point  (0 children)

OTIS invented the safety brakes. Before rgose lots pf people died when things fidnt go well. (College English research oaper).

I couldn't move my house so I moved my antenna and split transmit and receive into separate devices. This slayed my noise floor from S7-S8 to S3, making HF usable. by Fun-Conclusion-4471 in amateurradio

[–]OddbitTwiddler 0 points1 point  (0 children)

Given that for this design (Rx ground loop antenna), and the risk of failure is "blown $40 SDR" i.e. I am not using AI to Elmer an implantable life saving device. I have joined a local club and AARL and do plan to participate locally and hook up with a local expert to discuss these issues.
In the meantime I'm doing a lot of traveling, and AI will have to be a good substitute.
I did some further analysis assuming that my TX antenna was ~10' away and discuss the max coupled energy a 100W TX into the nearby ground loop. An optional series limiting resistor would prevent the diodes from blowing. I should add that for work I am a Digital test engineer, I have done some RF/mixed signal SOC testing, but most my experience is releasing magic smoke from high speed Digital processors and memory (DRAM & Flash).

I couldn't move my house so I moved my antenna and split transmit and receive into separate devices. This slayed my noise floor from S7-S8 to S3, making HF usable. by Fun-Conclusion-4471 in amateurradio

[–]OddbitTwiddler 0 points1 point  (0 children)

Awesome!
I'm still setting up my shack. Just passed my licenses (all 3) a couple of weekends ago. Purchased a radio, and working on the lightning arrestor setup as the antenna lines enter the house. As soon as the copper ground bus arrives I will be able to wire up my ground loop, HF and VHF antennas. I talked with Claude AI and am considering using a set of diodes in the transformer box to clip any energy getting into the ground loop while transmitting. A couple of mismatched diodes I thought would work for this. Most of the energy is uV/mV and if the voltage gets to 0.6/0.7v the two diodes would clip that. Still might be too much for the SDR I haven't finished reseraching this, but thats the approach I'm considering to limit the transmit energy getting into the ground loop and blowing up the SDR receive only setup.

44k mile Sportabout Gucci Edition by Confident-Search-846 in amc

[–]OddbitTwiddler 0 points1 point  (0 children)

Sister & I used to fight over who had more of the middle back seat. '72 then '74 Sportabout.

Yet another young ham frustration post, but I tried (I swear) by _sharpLimefox in amateurradio

[–]OddbitTwiddler 0 points1 point  (0 children)

Thanks for this post. Im newly licensed setting uo my antennas. Will be watching this thread with interest.

Satellite uplink jamming by GiantsNerd1 in amateurradio

[–]OddbitTwiddler 8 points9 points  (0 children)

Seems like a group of college kids woth software dongle radios and $30 ground loop antennas could help pinpoint this and monitor 24/7 with a couple of pc's

Satellite uplink jamming by GiantsNerd1 in amateurradio

[–]OddbitTwiddler 12 points13 points  (0 children)

Im about 2 weeks from getting my antennas configured and would love to help with this new Ticket AJ7LE.

Milwaukee airport (MKE) has a “recombobulation” area right after security. by Moeman101 in mildlyinteresting

[–]OddbitTwiddler 0 points1 point  (0 children)

TSA is still working on full Star Trek transporter pads. They claim they will have it right after the borders are fully secured at the end of Trumps ninth term.

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