iiinova — where your digital self keeps evolving

Jeff Keyzer @mightyohm.bsky.social · 06/09/2026

MightyOhm Geiger Counter Kits on Sale at Amazon – 20% off this week only: wp.me/pioCd-4ek

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Reposted by Jeff Keyzer

Justin K5EM @k5em.com · 27/09/2025

Another @mightyohm.bsky.social kit in the wild

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Jeff Keyzer @mightyohm.bsky.social · 23/09/2025

AVR HV Rescue Shield Sale – 25% off at Amazon while supplies last: wp.me/pioCd-4cc

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Jeff Keyzer @mightyohm.bsky.social · 02/07/2025

Thanks for coming to my talk! Great to see you at Teardown.

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Jeff Keyzer @mightyohm.bsky.social · 02/07/2025

Anyone looking for a moderator? ☢️ www.govdeals.com/en/asset/650...

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Jeff Keyzer @mightyohm.bsky.social · 25/06/2025

Teardown 2025: Useful Tools for Your Electronics Workshop: wp.me/pioCd-4bJ

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Jeff Keyzer @mightyohm.bsky.social · 04/04/2025

Working on something different today. One jump ring broke off of this stained glass (not mine) and while I was tempted to try and repair it with rosin core solder I decided to get the proper solid core solder and acid? flux.

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Jeff Keyzer @mightyohm.bsky.social · 04/04/2025

I see a couple rolls of 2mm on Amazon but for delicate repair work this is still huge.

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Jeff Keyzer @mightyohm.bsky.social · 04/04/2025

Stained glass folks. Why is solid core solder for stained glass absurdly large diameter? 3mm or 1/8" seems to be the standard.

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Jeff Keyzer @mightyohm.bsky.social · 27/03/2025

Check out this fondue set by Swiss Toolmaker PB Swiss. I feel like every major tool company has a couple items like this.

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Jeff Keyzer @mightyohm.bsky.social · 26/03/2025

King county also showing zero alerts. alerts.weather.gov/search?zone=...

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Jeff Keyzer @mightyohm.bsky.social · 26/03/2025

Given these recent predictions from NWS Seattle, why are there still no active NWS alerts for Seattle? alerts.weather.gov/search?zone=...

alerts.weather.gov

NWS Alerts

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Jeff Keyzer @mightyohm.bsky.social · 25/03/2025

Why don't modern CAT6 keystones have strain relief for the cable? Is this style of keystone considered acceptable for enterprise networking? Who makes enterprise-grade keystones? This one is from Cable Matters. For years Monoprice keystones had a zip tie but newer version doesn't.

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Jeff Keyzer @mightyohm.bsky.social · 13/03/2025

I wrote this 24 years ago, on my birthday. wavelen.com/pics/hd/inde...

wavelen.com

How to Repartition Your Hard Drive

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Jeff Keyzer @mightyohm.bsky.social · 12/03/2025

Am I missing any of the other major (reputable) electrolytic capacitor brands?

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Jeff Keyzer @mightyohm.bsky.social · 12/03/2025

Also can someone tell Illinois Capacitor that this table isn't a substitute for a series chart?

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Jeff Keyzer @mightyohm.bsky.social · 12/03/2025

Working on something today. I've been doing a lot of recapping recently and was getting tired of Googling pdfs. mightyohm.com/wiki/referen...

mightyohm.com

reference:electronics:capacitors:electrolytic [MightyOhm Wiki]

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Jeff Keyzer @mightyohm.bsky.social · 12/03/2025

That's a great question! I'd argue no... not "gas tight". I need to look into this.

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Jeff Keyzer @mightyohm.bsky.social · 12/03/2025

You know how those cheap Chinese alligator clip leads have folded and crimped wires? Turns out the American ones are like that too. I'm surprised to see this instruction sheet from Mueller. Can't we get an alligator clip that has a proper double crimp for conductor + insulation?

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Jeff Keyzer @mightyohm.bsky.social · 28/02/2025

I guess? Two pihole servers going 24x7 for years. Haven't had an SD fail yet.

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Jeff Keyzer @mightyohm.bsky.social · 26/02/2025

I find it very disappointing and surprising that there is still no officially supported in-situ upgrade path for Raspberry Pi OS. They expect you to write the new version of the OS to an SD card and copy over your config changes. Coming from Debian/Ubuntu, this is insane.

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Jeff Keyzer @mightyohm.bsky.social · 22/02/2025

Yes, I'm learning this. However, when the leads are very close to the PCB it can be tricky to get the nozzle onto the end of the lead without damaging the PCB!

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Jeff Keyzer @mightyohm.bsky.social · 22/02/2025

I'm not a fan of PCBs with leads that are bent tightly against the PCB. Makes desoldering difficult! Sony loved this technique and used it on lots of boards. Sometimes I just cut the part off and remove the leads one by one!

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Jeff Keyzer @mightyohm.bsky.social · 18/02/2025

When did it become so difficult to sell used books on Amazon?

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Jeff Keyzer @mightyohm.bsky.social · 14/02/2025

Hey, my Geiger Counter kit is now available to order from Digikey www.digikey.com/en/products/... thanks to @adafruit.com!

digikey.com

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Jeff Keyzer @mightyohm.bsky.social · 30/01/2025

Alternative packaging actually mentions DuPont. This is also known as CFC-113.

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Jeff Keyzer @mightyohm.bsky.social · 30/01/2025

Anyone looking for Freon-TF? This is an inexpensive source. Label on the bottle confirms it is TFTCE. Look up SDS if you are unfamiliar with handling this stuff. www.ebay.com/itm/16657923...

ebay.com

Nortronics Tape Head Cleaner QM-102 NEW, NOS, Sealed 2oz. USA Made | eBay

NORTRONICS TAPE HEAD CLEANER. Photos represent typical idem condition. MODEL: QM-102. I have not attempted to conceal any flaws, defects or information.

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Jeff Keyzer @mightyohm.bsky.social · 26/01/2025

In my case the PSU went bad. I should have done more testing to try and figure out why it failed.

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Jeff Keyzer @mightyohm.bsky.social · 26/01/2025

Nice waveguide filter on the bottom there, so while it looks relatively new there's some old school microwave tech too.

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Jeff Keyzer @mightyohm.bsky.social · 26/01/2025

Here's the datasheet for the radio. 135Mbps "high capacity" MDR-8606-135 www.starmicrowave.com/wp-content/u...

starmicrowave.com

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Jeff Keyzer @mightyohm.bsky.social · 26/01/2025

Here's a map of licenses still using the iconic rectangular KS15676 horns. I suspect many of these have been repurposed in-situ because they are very large, heavy, and hard to move. portal.radyn.com/license-sear...

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Jeff Keyzer @mightyohm.bsky.social · 26/01/2025

The cool thing about that website is that you can search by antenna make/model Here's a map of all of the p2p licenses using the round Gabriel horn antennas. The only ones left online are Queen Anne and a chain of presumably former long lines sites in South Dakota. portal.radyn.com/license-sear...

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Jeff Keyzer @mightyohm.bsky.social · 26/01/2025

Here's the license info for the path that goes from Queen Anne's long lines tower to Blyn: portal.radyn.com/license-sear... cc @tubetime.bsky.social

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Jeff Keyzer @mightyohm.bsky.social · 25/01/2025

I'll see if I can find the fixed wireless license again but I don't think it gives much info. It does include frequency, polarization, power.

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Jeff Keyzer @mightyohm.bsky.social · 25/01/2025

It's Qwest so, the phone company... I don't know enough about modern telecomm infrastructure to know what that entails, but those ISPs and cell towers need to get service from somewhere...

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Jeff Keyzer @mightyohm.bsky.social · 25/01/2025

The round horn antenna on the right hand side of the 2nd level from the top is still active, providing service to Blyn, WA. You can tell someone cares about it because the pressure seal on front is clean. The surrounding rectangular horns are presumably not being used, dirty, may not hold pressure.

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Jeff Keyzer @mightyohm.bsky.social · 25/01/2025

The Blyn side looks more modern in terms of infrastructure. Not sure if it was replaced or just built more recently and to a more modern standard. The Queen Anne tower was finished around 1962. I suspect none of the wireless equipment in the CO below is original, just the antenna/waveguide feed.

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Jeff Keyzer @mightyohm.bsky.social · 25/01/2025

There's a current license for point to point microwave service out to Blyn on the Olympic Peninsula. IIRC it's operated by Qwest so I presume it's providing telecom/data service out there. The antenna is very very old so I suspect it's a link that was established during the long lines era.

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Jeff Keyzer @mightyohm.bsky.social · 25/01/2025

Simichrome works amazingly well at cleaning up corroded RCA connector shells. I used a kimwipe at first but then switched to a dremel buffing wheel which quickly turned black from all the gunk that came off the connectors. I think Autosol and Flitz would work too.

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Jeff Keyzer @mightyohm.bsky.social · 25/01/2025

Here's the tower during the day.

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Jeff Keyzer @mightyohm.bsky.social · 25/01/2025

My corner of Seattle still has an AT&T long lines tower. It's a prominent local landmark but I suspect most folks have no idea why it's there. One of the horns is still in use, which is very rare. #seattle #longlines

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Jeff Keyzer @mightyohm.bsky.social · 20/12/2024

Has anyone found a good replacement for the Ikea Jansjo task lights? They are no longer available and I have several of them that flicker randomly.

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Jeff Keyzer @mightyohm.bsky.social · 11/12/2024

A plea from a DMM manufacturer.

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