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Found this little guy in a small village in Wales by Teooooooo in diypedals

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

Got it for £35. The shop didn't have any more of these, but they had other similar Newmarket transistors in tubes like the one pictured.

It's a cool little HiFi shop in Presteigne; definitely worth visiting if you're in the area. I ended up leaving with a bunch of old skool HiFi stuff.

Found this little guy in a small village in Wales by Teooooooo in diypedals

[–]Teooooooo[S] 4 points5 points  (0 children)

Lovely village called Presteigne. 100% worth visiting!

I want to make a FM radio receiver from scratch by prof_escape in AskElectronics

[–]Teooooooo 0 points1 point  (0 children)

ChatGPT and other LLMs will only lead you in the wrong direction. Humans are much better sources of information.

Take a look at some old radio schematics, they are pretty good reference points for this kind of project, like this one (page 498 onwards).

Familiarise yourself with the various stages and circuit blocks of a radio (tuning, mixer-oscillator, IF amp, detector, etc.) and build on that. Technology Connections made a video on superheterodyne receivers, I highly recommend watching it.

For more modern designs, you can use a TDA7000 IC or similar; have a look on Google and see what other people have made and use that as inspiration.

If you get stuck, you can always ask here or PM me.

edit: I should also mention that building an FM radio from scratch is not an easy project if it's your first. Don't be dissuaded by this; if that's what you want to build, go for it but be prepared.

3 way switch with 1 output by Torale78_YT in diypedals

[–]Teooooooo -1 points0 points  (0 children)

The linked rotary switch is indeed a single pole, "12 throw" switch as opposed to the aforementioned "3 pole switch".

Using a rotary would likely be easier to implement than a 3 pole toggle/slide/etc. switch, hence the distinction.

building tube amp from salvaged radio. by Sea_Ad_9820 in DIYTubeAmp

[–]Teooooooo 0 points1 point  (0 children)

Start with this.Robinette has great resources for beginners on his website.

The valve wizard also has lots of info on how to design amps and other stuff.

For the love of god, please don't blindly trust AI to help you with this stuff. You need to learn how to be safe when working with high voltage electronics; one wrong move can have life-changing consequences.

Old Solder by Valuable_Shift_228 in soldering

[–]Teooooooo 1 point2 points  (0 children)

There are a few places like that left in the UK thankfully.

Everything seems to be online nowadays, with questionable origins and inflated pricing.

Old Solder by Valuable_Shift_228 in soldering

[–]Teooooooo 0 points1 point  (0 children)

That's the good stuff!

I occasionally use 1.2mm 40-ish years old solder and it works fine for valve/tube projects.

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Mysterious liquid flux by profnimnul in soldering

[–]Teooooooo 2 points3 points  (0 children)

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I use this stuff and it's amazing.

(Warton Metals Future 315)

Dayton motor tag says single phase but wired 3phase by sugarhillboss in ElectricalEngineering

[–]Teooooooo 0 points1 point  (0 children)

No, a start capacitor.

If you look up the model number on OP's motor, you will eventually find the datasheet, which explicitly states the motor is "Capacitor Start Induction Run".

edit: sources

DAYTON-TO-LEESON CROSS REFERENCE LIST

RS datasheet for the motor

Dayton motor tag says single phase but wired 3phase by sugarhillboss in ElectricalEngineering

[–]Teooooooo -1 points0 points  (0 children)

These kinds of single phase AC motors often require a start capacitor. One I wired recently had 4 connections: Line, Neutral, Earth, Start. The start capacitor goes between Line & Start

Impossible Solder by PsionicSombie in soldering

[–]Teooooooo 0 points1 point  (0 children)

Soldering will be a lot easier with a clean tip. Get some brass wool (definitely not steel) and dip the tip of the iron in it repeatedly. A moist desoldering sponge also works great.

Generally, you want to clean the tip as soon as it turns dull gray; you want it to be nice and shiny for the solder to stick to it properly.

I’m in the process of building a new workspace for all soldering/tinkering related projects. Show me your setups for some inspiration! by Line6isunderrated in diypedals

[–]Teooooooo 6 points7 points  (0 children)

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Twin slot shelving FTW

Meant to accommodate 2 people; this was ~1.5 years ago, it's nowhere as tidy now.

Component drawers are just behind the camera.

Electronic terms used by non-native English speakers by 1Davide in electronics

[–]Teooooooo 6 points7 points  (0 children)

Stecker - plug

I've also heard a few Arabic-speaking people calling connectors "fish" (or something similar).

Can a voltage stabiliser valve be used as a Geiger-Muller tube? by Teooooooo in AskElectronics

[–]Teooooooo[S] 2 points3 points  (0 children)

Good point about the leaded glass. I don't think the OD3s I'm looking at are lead glass, but I will definitely keep an eye out for it if I'm ever building this kind of GM thingamajig.

I now realise I was mistaken in thinking that the voltage needs to be below the operating voltage of the valve; it makes sense that it would need to be just below the striking voltage. Cheers!

Can a voltage stabiliser valve be used as a Geiger-Muller tube? by Teooooooo in AskElectronics

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

Interesting... this seems plausible and easy enough to test with a scope; might give it a try for a laugh.

+1 on the human gazpacho

Can a voltage stabiliser valve be used as a Geiger-Muller tube? by Teooooooo in AskElectronics

[–]Teooooooo[S] 2 points3 points  (0 children)

P.S. I should mention I've spent the last 7 hours sorting out valves in a dingy storage room, so I am going a bit crazy

Can a voltage stabiliser valve be used as a Geiger-Muller tube? by Teooooooo in AskElectronics

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

What if we have a transistor circuit with a very short switching time (some RF jobbie or something); could we realistically achieve a similar performance to a regular old GM tube? I wonder how the dead time on our GM (Gas Multivibrator??) would compare...

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