Signal Flow Transistor AM Radio

www.photoshop.c...
Download drawings from above link.
Signal Flow Transistor AM Radio same architectural stamp as the All American Five Vacuum Tube Radio

[@TheTransoceanic]

As always Thank You for making the effort, you explained the signal path in simple terms and kept it so interesting. Been restoring radios for 15 yrs. and still learn so much from your videos.

[@mondays89]

I have to admit, was about to stop watching the video at the beginning but I am glad I continued watching. Very good info, thanks for posting the vid.

[@josegermanparra6064]

Many thanks for this very clear video! Trying to align an old AM transistor radio. Now everything is much more clear

[@AllAmericanFiveRadio]

I'm glad it helped. Thanks and your welcome.

[@GroverCricketDaisy]

Another great lesson following your schematic was great.

[@AllAmericanFiveRadio]

Thank you, and your welcome.

[@AllAmericanFiveRadio]

Thanks CameramanLink I can remember transistors being somewhat expensive when I was in High School, because I was buying them one at a time. But for manufacturers they were much less expensive.

[@andrewferg8737]

I was wondering if you've ever tried using varactors in place of the ganged variable capacitor? I'm ok with a simple varactor VCO, but I'm not sure how to combine two coils in one VCO with a mixer... Any suggestions?

[@AllAmericanFiveRadio]

@@andrewferg8737 Hey Andrew Been busy working, if I don't answer an email send it again. Yes I have made some videos on varactors. Varactor sounds like something from Jurassic Park. Varicap, Varactor Diode circuit demo kzbin.info/www/bejne/bGnUgKV6oZpoqsU FM Transmitter Varactor Diode Modulator kzbin.info/www/bejne/gIKqiKVombWYaqc Oscillator Varactor Frequency Control circuit demo kzbin.info/www/bejne/hIC4XpWLgNV_ZpI I'm still thinking about how to combine two coils in one VCO with a mixer. Rick

[@AllAmericanFiveRadio]

@@andrewferg8737 [e-mail]

[@randyc8171]

This is what I have been looking for for a long time. Thank you !

[@AllAmericanFiveRadio]

Thanks and your welcome.

[@leoreimer7180]

Thank you Sir!... It's a pleasure to watch your videos

[@AllAmericanFiveRadio]

THANKS

[@binarybox.binarybox]

Excellent description. I have at least 3 1960s transistor sets that I want to check over when I get the time.

[@AllAmericanFiveRadio]

Thanks

[@AllAmericanFiveRadio]

Thanks nottinghamnc In Ham Radio, Morse Code is sent with just the carrier, turning it on and off. You can hear it but it is much like thumping the speaker. If you add a BFO oscillator of a frequency very close to the carriers frequency, and then mix the two you will hear and audio tone every time the carrier is on. This radio oscillator does beat with the radio station but it produces an intermediate frequence I.F. of 455KC. Same principle but for a different purpose.

[@AllAmericanFiveRadio]

Thanks joernone Hey John, Your video idea is in the KZbin video list. Regards, Rick

[@barn5923]

Just wanted to say I enjoy all your videos

[@AllAmericanFiveRadio]

Thanks FyberOptic The only advantage may be that the manufacturer of the radio got a prices cut from the manufacturer of the PNP transistors.

[@raguaviva]

Such a great video, now I understand it all!

[@joernone]

Rick, Excellent explanation and great use of graphics. I really enjoyed this vid. Learned a bunch. Thanks, my friend. Regards, John

[@AllAmericanFiveRadio]

Thanks CameramanLink If this radio used NPN transistors the polarity of the battery would be reversed. The frequency mixing is different as for as the medium goes but the physics is the same principle. Yes it takes more transistor than a AA5 tube radio. But transistors are really cheep. Yes they did transistorized it. It is the same AA5 technology modified for the transistors, mainly low impedance transformers, and the small size of all the parts.

[@barn5923]

Just wanted to say I enjoy all your videos Darryl

[@chris.jackson]

Excellent description - I love your videos.

[@paulmeynell8866]

Brilliant description thanks

[@AllAmericanFiveRadio]

Thanks

[@AllAmericanFiveRadio]

Thanks AndyDaviesByTheSea Hey Andy, Thanks for your kind remarks. Hope you sale goes will on ebay. I'll put the "index" idea in my KZbin Video List. Regards, Rick

[@javierbiaggi3072]

Thanks a lot! Very clearly exposed and interesting.

[@AllAmericanFiveRadio]

Thanks

[@MrUbiquitousTech]

Very good, thanks for sharing Richard!

[@AllAmericanFiveRadio]

Thanks

[@VintageLabSilvioPinheiro]

Ground as positive ? Interesting ... thanks for sharing

[@binarybox.binarybox]

These are old PNP transistors which have + on their Emitter.

[@AllAmericanFiveRadio]

Thank you.

[@hadireg]

very nicely explained!!! Thank you!

[@AllAmericanFiveRadio]

Thanks and your welcome

[@sriewid]

it's good one... thanks, good videos..

[@AllAmericanFiveRadio]

THANK YOU!

[@billybonewhacker]

another great one ty.

[@raghvendrasingh-qu2zv]

I have seen so many radio reciever circuit every circuit has different kind of antenna coil circuit and oscillator circuit it is very difficult to unserstand how and what is happening only know that superhetrodyning is happening but how ?

[@AllAmericanFiveRadio]

password "allamericanfiveradio' The Vacuum Tube Shortwave Radio www.richardmcwhorter.com/vacuumtuberadio/

[@AllAmericanFiveRadio]

Thanks mondays89

[@AllAmericanFiveRadio]

@thereelmaster Funny you should mention that. I am working on draws now, tube and transistor side by side. I have done a few on how transistor works and or functions. I'll send you some videos.

[@essadikassia6105]

1

[@suhailasaba1051]

Question: Do you have a video showing tracing the signal on scope for an AM or FM transistor radio ? Thanks for your great explanation.

[@AllAmericanFiveRadio]

Here are some videos that may interest you. Oscilloscope signal tracing kzbin.info/www/bejne/eGWXqHugl52dg7s Digital PC Oscilloscope Signal Tracing kzbin.info/www/bejne/lZercqiwea6ae7M AM Radio Demodulation Oscilloscope Demo kzbin.info/www/bejne/pnykYYeGmdN7nZo Superheterodyne AA5 from End to End kzbin.info/www/bejne/nZ3EnKKEg5mfraM FM Discriminator Circuit Audio Detection kzbin.info/www/bejne/hJbJY2CMirmqj9k

[@suhailasaba1051]

Thank you very much for your answer.

[@matts7975]

Either thinking in conventional current flow, reverse biased transistors, or thinking rf/audio signals would seek going to ground, rather than the next component, really confuses me.

[@AllAmericanFiveRadio]

This should help. Impedance and Frequency, Oscilloscope Demo kzbin.info/www/bejne/ioO2f36tqbqsbsk Capacitive Reactance and Frequency Demo kzbin.info/www/bejne/iWbCaJp9fd2Jr7M Capacitors, DC, AC, and Frequencies kzbin.info/www/bejne/j5etfIGJoN-Sgs0 Superheterodyne Radio, heterodyning frequencies together, how it works kzbin.info/www/bejne/a3eQmn6fodmYqbc The Oscillator Mixer kzbin.info/www/bejne/mmqZp6qXp62Wqck RF Choke Demo kzbin.info/www/bejne/g2WogKh3lptka9U LC Resonance Oscilloscope Demo kzbin.info/www/bejne/fZC1dKx6mdllqK8 Capacitors, DC and AC Current kzbin.info/www/bejne/hHrRpWSJqJiph5Y AA5 Radio Signal Flow kzbin.info/www/bejne/sJzRoWN8hNCDjrc

[@AllAmericanFiveRadio]

Thanks barn5923

[@AllAmericanFiveRadio]

@mc68hc000 I uploaded the pictures and you can find the link in the more info of this video.

[@AndyDaviesByTheSea]

Hi Richard, another excellent video, a lot of work there! The Marconi 878 radio you commented on is going to be sold on eBay for a poorly friend of mine and I hope you don't mind but I've put a reference to your good work in the advert as I think anyone setting out to restore a valve (or transistor) radio would do well to draw on your experience. Can you upload a video called "index" as there are so many good things to look at in your channel. Well done! Kind Regards ...Andy gw0jxm

[@harrybond007]

I have a Westinghouse 602P7 7 transistor radio from 1956, all the electrolytic and wax capacitors have been replaced, the radio now works pretty well. But there is 1 problem, at turn on after being off for a while the radio can take 30-60 seconds before coming to life, any idea what the problem is?

[@AllAmericanFiveRadio]

This is just a guess, I would think it was the oscillator. It does work so I would just leave it along until it stops working.

[@harrybond007]

@@AllAmericanFiveRadio So you mean the oscillator transistor could be bad?

[@AllAmericanFiveRadio]

Thanks dr34mc0d3r

[@AllAmericanFiveRadio]

Thanks lawnmowerrecycler

[@FyberOptic]

Would there have been any advantage to using all PNP transistors like that?

[@AN-Saudi_Arabia]

Hello and greetings from Saudi Arabia. I would thank you for the great videos and the illustration you make it available for your followers. I have Presto K7 Record Cutter Lathe which I couldn’t find any schematic for. I have started the restoration including replacing the tubes and all other components and would ask you to kindly making a video about how to draw a schematic digram correctly for any vintage vacuum tube machine without a schematic available for download and which software you would recommending to use in drawing the schematic to make it available for anyone needs to service or restore the same machine. Thanks.

[@AllAmericanFiveRadio]

How to draw up a schematic would make a good video. Good luck with your restoration. Until the video, you might consider downloading my free e-book you may find it useful. The Vacuum Tube Shortwave Radio www.richardmcwhorter.com/vacuumtuberadio/

[@AllAmericanFiveRadio]

@thereelmaster I think I sent you three or four videos. KZbin is showing one sent. Let me know if you only got one.

[@paulmeynell8866]

Why do you need to add the if signal? Why don’t you just amplify the received signal ?

[@AllAmericanFiveRadio]

The IF cans are very sharply tuned, very high Q at 455kHz. Mixing the station signal and the oscillator signal together making a 455kHz signal per station one at a time and passes through the IF circuit. If there are two stations close together the one that makes the 455kHz will get through the IF's the other will not. This was the first good station selection circuit and it was cheap.

[@paulmeynell8866]

AllAmericanFiveRadio thank you that makes a lot of sense

[@danielsteele7544]

Thankyou

[@AllAmericanFiveRadio]

Thanks

[@thereelmaster]

say your rely good at making videos on how vacume tubes work, can ya make a video on how a transitor works? thanks

[@weerobot]

Cool..

[@AllAmericanFiveRadio]

Thanks and your welcome.

[@akepatinagaraju8564]

👍👍👍

[@AllAmericanFiveRadio]

Thanks

[@AllAmericanFiveRadio]

Thanks mc68hc000

[@OmarMohamed-hy9rs]

ارجو الشرح اللغة العربية

[@AllAmericanFiveRadio]

يرجى تجربة خيار التسمية التوضيحية المغلقة CC.