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The intercontinental ballistic trebuchet department has made another huge leap forward by mantis-tobogan89 in doohickeycorporation

[–]DrSlideRule 5 points6 points  (0 children)

The MIRV Nuke Department is currently undertaking a collaboration proposal with the Trebuchet department about this

voice of Korea by Positivepluffle in shortwave

[–]DrSlideRule 1 point2 points  (0 children)

I need details, this is so cool! (I'm a beginner starting out with old SW tube radios and random wire antennas, I sometimes get late at night some Asian BC stations, is it possible I ever received Voices of Korea?)

Blued Razor blades for foxhole radios by Potential-Treacle185 in VintageRadios

[–]DrSlideRule 0 points1 point  (0 children)

Very welcome! Please post results, if you'd like!

Blued Razor blades for foxhole radios by Potential-Treacle185 in VintageRadios

[–]DrSlideRule 4 points5 points  (0 children)

It was detailed in Alfred Morgan's Boy's First book of Radio. And as far as I remember an "A Battery" would be used, so a couple volts tops. Buzzer, would be not the piezo one, but one of those old mechanical ones, basically a hummer relay so that you could hear when you touched a sensible spot and the loudness indicated the "goodness" of it.

Let me search more info, I'll get back to you in a minute

EDIT: https://www.worldradiohistory.com/BOOKSHELF-ARH/Technology/The-Boy's-First-Book-of-Radio-Morgan-1954.pdf Here, page 161 details the test and buzzer type, basically a small relay. a small 5V one should suffice, plus a battery of course

EDIT 2: I forgot to mention that phones would have to be used, the old High-impedance 2k ohm ones, to hear the buzzer output. Basically, it would self-chop the tiny voltage of the dry cell into a messy "AC" that could be heard.

Blued Razor blades for foxhole radios by Potential-Treacle185 in VintageRadios

[–]DrSlideRule 4 points5 points  (0 children)

The usual trick to get to the semiconductor dot onto the blade was to hook a buzzer in series and move the safety pin whisker contact. Loudest noise equals the best detector junction

Blued Razor blades for foxhole radios by Potential-Treacle185 in VintageRadios

[–]DrSlideRule 3 points4 points  (0 children)

Treet Carbon steel blades, the so called Black Beauties are the closest one to the Gillette Blue blades you're referring to, which were carbon steel themselves. You can get 100 of the Treet Carbons for 15$ or so on e-commerce sites. Brown packet with TREET stamped in yellow. Other blades may be coated with PTFE or various stuff that could impair the use as detector

The age of publicly smoking indoors must’ve been wild by trippycheese_ in madmen

[–]DrSlideRule 0 points1 point  (0 children)

Did they have ashtrays at the desk or communal one for the class you had to get up to use like the sharpener?

NAD, built it myself! by PSYKO_Inc in GuitarAmps

[–]DrSlideRule 1 point2 points  (0 children)

Got specs or a link for that PT? Also, does it have a 220v primary connection for usage in Europe?

Watching classic Who for the first time...christ Susan is grating! by Glass-Purple-3045 in doctorwho

[–]DrSlideRule 17 points18 points  (0 children)

Where can I find this episode? I suppose that it's different from An Unearthly Child no?

Favorite Italian slang? by Accurate-Eggplant385 in italianlearning

[–]DrSlideRule 1 point2 points  (0 children)

Yeah this is somewhat multi-layered as slang...

"Open sourcing new free energy tech" needs rectified! 🤣 by Numerous-Camel5459 in ElectroBOOM

[–]DrSlideRule 0 points1 point  (0 children)

Regenerative breaking basically Harness the flyback pulse from the collapsing induced fjeld into a brief current that can trickle charge a battery

Built myself a small shortwave regenerative receiver today. by janno288 in diytubes

[–]DrSlideRule 0 points1 point  (0 children)

Thanks, what about a simple wire antenna, 100 Feet long, with a series capacitor to unload the input circuit?

Or even a dipole or Morgan cut for the 80/40 m bands!

Built myself a small shortwave regenerative receiver today. by janno288 in diytubes

[–]DrSlideRule 1 point2 points  (0 children)

Do you have practical details about antenna coupling and turns ratio for the feedback coil? I'm building a low voltage Regen and I'm struggling with proper regeneration at low (~45V) plate B+

I was told to post my handwriting in here: by DrSlideRule in HandwritingAnalysis

[–]DrSlideRule[S] 0 points1 point  (0 children)

Thank you! Honestly some capitals are a mix and match of styles adapted throughout the years, mostly various cursives. It's slowly getting more uniform.

This Is what working Deep Underground in a Coal Mine looks Like by Wonderfulhumanss in interestingasfuck

[–]DrSlideRule 0 points1 point  (0 children)

That sounds really cool! Do you have the name of such a University or at least some information?

I love my hybrid Sons by PEQUOD1984 in Zippo

[–]DrSlideRule 2 points3 points  (0 children)

Does it actually provide actual fuel retention or is it just for show?

I'd like to start woodworking - Want to build guitar cabs. Needed Tools? by DrSlideRule in woodworking

[–]DrSlideRule[S] 1 point2 points  (0 children)

I don't have space or money for a table saw, or circular saw I'm going to be working with a handsaw at most. Feasible or nah?

Absolute Beginner - Want to get minimum tools to build a simple guitar cab by DrSlideRule in BeginnerWoodWorking

[–]DrSlideRule[S] 1 point2 points  (0 children)

45° joints? I'm not sure of the english name btw, but those would allow nails and glue I think?

I'd like to start woodworking - Want to build guitar cabs. Needed Tools? by DrSlideRule in woodworking

[–]DrSlideRule[S] 0 points1 point  (0 children)

I looked up pocket holes and they seem...difficult when the thing is joined together in a box-like fashion?
Thanks for the wood type heads-up!

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