Comparing the function of transistors and tubes.

[rick62008]

If it wasn't for the voltage differences, could you use a transistor to replace a vacuum tube? For the looks of it you just would need to leave the filaments wires desconnected since there would be no filament!

[AllAmericanFiveRadio]

@rick62008

Correct. If you look at a wiring diagram for a five tube AM radio and compare that with a five or six transistor AM radio wiring diagram, it is really the same thing.

[HexiBase]

Very nice. Every build any single-ended triode audio amplifiers?

[AllAmericanFiveRadio]

@HexiBase

Both tube and transistor.

[kore464]

I wish I could have been around when tubes were the dominant tech in electronics. I grew up with transistors and digital circuits, but I hope to one day be able to build a tube amp, just for kicks. Thanks for the videos.

[AllAmericanFiveRadio]

Thanks kore464

[AllAmericanFiveRadio]

I would use one of my battery eliminators for antique radios. You can use 6.3 AC or DC for the filament. If you can have or can barrow a heavy enough 6V battery, that would work for testing.

[ElectronicsIsFun]

I like the use of gozinta and gozouta in your comparison. It make your video interesting.

[AllAmericanFiveRadio]

Thanks ElectronicsIsFun

And you will remember it too.

[iamsnail]

I still dont understand how the signal is getting powerfull, i mean what causes the signal to be more powerfull? And why?

[AllAmericanFiveRadio]

That potential is supplied by the circuit the tube or transistor is in. Also neither the tube or transistor can amplified beyond the power supplied by the circuit.

[iamsnail]

@AllAmericanFiveRadio

But why the weak signal gets more powerful? I dont understand how that happends.

[AllAmericanFiveRadio]

Amplification is a actuate term, but it is not what you may think it is. A tube or a transistor uses a small signal to control a much larger power supply. I will email you one or two other videos that may help.

[UserIsAnFBIAgent]

Awesome Video...

[AllAmericanFiveRadio]

Thanks UserIsAnFBIAgent

[UserIsAnFBIAgent]

@AllAmericanFiveRadio np, thanx for your help with understanding Transistors.

[AllAmericanFiveRadio]

Your welcome, hope the videos help!

[weylin6]

This video should be comparing them to Field Effect Transistors (FETs) not Bipolars.

[AllAmericanFiveRadio]

This video is about how tubes and transistors work. Not how to substitute a solid-state for a tube.

[thehasslessydney]

great vid, thank you

[u3of52]

As cctv2wayradio said "very well explained."

Great Vids .. Keep them coming. Thanks You!

[AllAmericanFiveRadio]

THANKS!!

[gottogosome]

A Vacuum Tube is more similar to an FET transistor than an BJT transistor. Tubes, like FET'S are voltage operating devices whereas BJT's are current operating devices. Tubes and BJT are quite different in that respect.

[AllAmericanFiveRadio]

True

[somorastik]

By the way to show similarity between tubes and transistors it would be wiser to show a PNP tranzistor.

[AllAmericanFiveRadio]

I did.

[AllAmericanFiveRadio]

Audiophiles will agree with that.

[yadeyrinii]

Thank you. This is excellent. I very much appreciate this informative look at electronics. You have done a good service.

[AllAmericanFiveRadio]

THANKS!

[50unitedstates]

What is the point if transistors and tubes? I'm a biology major...I have trouble with electronics. Is it that they are both supposed to amplify voltage? Thanks

[AllAmericanFiveRadio]

Well, they both do amplify but the voltage is already there from the power supply. What takes place is both have the ability to greatly change resistance between Emitter/Collector, Cathode/Plate, with respect to a very small voltage change at each input. Some view this as negative resistance.

[AllAmericanFiveRadio]

True.

[gmcjetpilot]

The main thing to remember is you control a large current flow with a small signal voltage. Think of a FIRE HOSE at full blast. Now stop it with your mouth? However with a valve & handle you can stop or change the FIRE HOSE flow with little effort. Functions of tubes/transistors are many, but common uses are ON-OFF SWITCH or CONTROL FLOW. The control signal is very small & can change at high rates or frequencies. With clever use of transistors you make a computer, TV, cell phone...

[AllAmericanFiveRadio]

True.

[randomcrazyness]

transistors is like a switch that uses electricity to turn on. basically what it has is 3 pins, positive, negative and a control switch. the more volts u put into the control switch will make more electricity flow through the transistor. it works best with those turning type switches were you have to turn it to set how much power you want on the lights

[AllAmericanFiveRadio]

Transistors can act as a switch or a variable resistor depending on the circuit it is in. The Base is the connection that controls the flow of electrons through the transistor. The thing about the Base is, that a very small voltage on the Base is controlling a much larger voltage through the transistor. So if the Base has a small audio signal on it, a larger audio voltage is produced by the electrons flowing through the transistor.

[cctv2wayradio]

very well explained! thanks

[AllAmericanFiveRadio]

Thanks, glad you liked it and I hope you found it useful.

[VideyoJunkei]

I always remember-the arrow must point to the lower voltage...usually ground. Diodes are the same!

[AllAmericanFiveRadio]

Yep, the input and out, and the polarity are useful information when troubleshooting. Thanks.

[manamimnm]

The arrow is representing the emitter no matter where it is pointing at. In NPN: the collector voltage is higher than the emitter. In PNP: the emitter voltage is higher than the collector.

[AllAmericanFiveRadio]

The arrow is the emitter and it point to the negative source. The collector and emitter voltages are determined by the circuit the transistor is in. Common Emitter circuits and Common Collector circuits are the most typical types of circuits.

[kaly13]

look guy your cool, i am working with a robot but something is missing i don't have a 06 transistor,do you now for another transistor that can replace 06 transistor

[AllAmericanFiveRadio]

Thanks. Please email me the part number of the transistor/s. I'll be glad to help anyway I can.

[fedaykin21]

GREAT VIDEO!

How about one that explains how transistors work? :D

[AllAmericanFiveRadio]

That's possible. But until then download Module 7-Introduction to Solid-State Devices. This is from the Navy Electricity and Electronics Training Series. I made a video about this series and there is a link to the downloads in the "About This Video." It is very good and should be helpful to you.

[CassetteMaster]

That's a good well done video!

[AllAmericanFiveRadio]

Thanks! I was working on this until 2:30am. I kept screwing up the on NPN and PNP. But I finally got it right. It's so very important to under stand the big picture before getting into more detail.

[CameramanLink]

Good explanation! It's intersting how tubes and transistors function in a similar fashion, but have very different circuit designs.

[AllAmericanFiveRadio]

Thanks.

The transistor is a much more versatile device. It does lend itself to a large number of circuit deigns, some unique to sold-state. But tubes are much more rugged and more forgiving.

[coondogtheman1234]

and tubes have warmer sound than transistors, and i believe tubes are more resistant to an EMP pulse than transistors

[AllAmericanFiveRadio]

Exactly!

[Ronbob59]

Rick... Perfect example. Just what I needed. As always, Thank You very much... Ron

[AllAmericanFiveRadio]

Thanks Ron.

[AllAmericanFiveRadio]

I'll keep trying, A.

[speedyc395]

Nice video :)

[AllAmericanFiveRadio]

Thanks!

[Hammondlover2]

So far you have been my only human teacher. I've been relying mostly on books and internet sources.

Once again valuable info.

Thanks

[AllAmericanFiveRadio]

Hope this helps, and thanks. I'm getting some very good questions.

[sidebander]

Excellent, keep making good videos.

[AllAmericanFiveRadio]

I'll keep trying.

It was your question that gave me the idea. Thanks!

[tubeie07]

Superb explanation - your instructional vids are very good, pleasure to watch - evenly presented...

[AllAmericanFiveRadio]

Thanks, I really appreciate that.

[joernone]

Rick,

Good job of comparison. Short, to the point, easy to understand. Brings back memories of me ole BE&E days. Perhaps a second vid on checking out a transistor...base to emmiter...emitter to collector, etc?

John

[AllAmericanFiveRadio]

Hey John,

That's a good idea. This video came about from another email question.

Thanks, Rick