Simply outstanding explanation of the way an AA5 works Rick. Clear, concise, wonderfully done. Thanks! :)
@AllAmericanFiveRadio2 жыл бұрын
Hey Doug. Thank you.
@Pwaak2 жыл бұрын
Your dedication to sharing your amazing knowledge is very much appreciated! Thank You!
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@W1RMD2 жыл бұрын
Wow what a great little radio! Excellent sound as well. I love seeing the avc in action. It's amazing how they had this technology in the 30's, yet commercials in modern tvs blow your eardrums out!
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@boydbailey63322 жыл бұрын
A well kept secret is that the technique demonstrated here with measuring the AVC is the quick, hassle-free, way to peak out the signal in doing an alignment. No having to keep the signal level low in order to avoid invoking the AVC effect. Thanks, Mr. McWhorter, for your outstanding videos and books!
@AllAmericanFiveRadio2 жыл бұрын
yes that will work nicely. Thank you, and your welcome.
@MisterEnd18 ай бұрын
I'm learning about superhet and vacuum tube circuits in order to repair an antique radio I inherited. Your videos are better than many of the "high brow" ones I've come across. I like your hands-on, direct and practical style. Although I worked for 20 years as an electronic technician, I never dealt with vacuum tubes or radio before.
@AllAmericanFiveRadio8 ай бұрын
Thank you. Here are some other videos that may help. The last link is my FREE ebook. The password is allamericanfiveradio Let me know what you think. Triode Tube Amplification Visual Demo kzbin.info/www/bejne/anfOdWOCh86obaM Control Grid, Triode Tube kzbin.info/www/bejne/gZCke4V_qLOfiJI How Superheterodyne Works kzbin.info/www/bejne/oILHY3-cibSUas0 Password is allamericanfiveradio kzbin.info?event=channel_description&redir_token=QUFFLUhqa2hhVTRycWdJd1FUbTFCZWNmdGtQNlZCRmEzd3xBQ3Jtc0tuOFQ2bFhRcWdjdUdIcUREcnZFaHc0M2xURGhITVRuWDE2cGlDakdYUF9uODktNzc3TVRJTWdROUt6R3NLN2lla3hFS2lIM0RnOXR1dXFxMGx2cUNtWDhXb1Zvc2RCbGQxTThoendmN2E5R0lJdmI0Yw&q=https%3A%2F%2Fdrive.google.com%2Ffile%2Fd%2F1HHmaWYr7UMACfmS4W5uL6PADoem2KlRp%2Fview%3Fusp%3Dsharing
@RestoreOldRadios2 жыл бұрын
Rick - another one of your amazing illustrated tutorials that keep things simple and easy to follow. As always, thank you for taking time to share your knowledge with us. All the best. Don
@AllAmericanFiveRadio2 жыл бұрын
Thanks Don. This one took awhile, but I'm glad I took the time. I also learned somethings able Corel Draw.
@rogerbanzai20532 жыл бұрын
beautiful contribution of superheterodyne amplitude modulation receivers reminds me of my years as an electronics student when our professor victor peiroti taught us the theory of superheterodynes with their tandem variable capcitor the local ocildor coil the intermediate frequency transformer the 1n34 diode that he used to audio demodulator that separates the audio from the radio frequency of the IF. how many memories. the mathematical equations the formulas thanks for the video. Kind regards from Argentina 👍🙏📻
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@bluearcturus132 жыл бұрын
Glad to have this on youtube, a fantastic explanation of such a classic radio circuit, thank you very much! When measuring variable voltages like the AVC regulating voltage, I personally find it useful to use a analog multimeter instead of a digital one. The range of the needle movement on the scale is maybe more meaningful. But when measuring steady voltages or currents, like the measurement of filament voltages, plate or screen grid voltages, I prefer to use a digital voltmeter. When measuring the AC ripple on top of the DC voltage of the output of the rectifier stage, a digital voltmeter would be the very best choice. Best regards from Switzerland, bluearcturus
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@pragmatologist2 жыл бұрын
The "gold standard" of the time was to use a VTVM and look to peak the IF outputs. It still is the thing for any tube-type radio gear. No restorer or ham's bench should be without one.
@SSJIndy2 жыл бұрын
I was given one by a relative when I was a kid. I modified it to take an octal socket with different coils so I could also tune the SW bands. Loved that thing. The smell, glow and warmth of all those tubes added to the mystique.
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome. They are fun and interesting.
@jp0407592 жыл бұрын
Excellent walk through of the entire radio. Great job sir.
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@electronron12 жыл бұрын
This brings back memories, in college our class built the AA5 radio and after getting it working and tuned, the teacher and assistant would bug them and return them for us to troubleshoot. They complained that mine was difficult to bug because my wiring was too neat. I had built many kits prior to college so making it look good was easy for me.
@AllAmericanFiveRadio2 жыл бұрын
Sounds like a great course. Thank you,
@angelogmassolin50562 жыл бұрын
Holy smoke .... I built one of these when I was in school learning about electronics back in 1968, then we went on to transistors then the first wave of IC's .... well any way the soldering iron was a huge 100 watt thing ..... lots of fun back then .... LOL LOL
@AllAmericanFiveRadio2 жыл бұрын
Thank you. Yes it was fun!
@beckbrook6052 жыл бұрын
It’s really well explained, the demos, the calm pace, the circuit highlighting, thanks for this video
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@CraneofBoulogne2 жыл бұрын
Good information presented in a way simple enough that most anyone can understand and learn it. Thank you so much for posting this!
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@SuburbanDon2 жыл бұрын
Very good. When covid started I had the pleasure of restoring a 1946 Philco tabletop radio that was similar to one I had as a young boy. I was able to see signals similar to these. Thanks.
@AllAmericanFiveRadio2 жыл бұрын
Hope you keep restoring radios. Thank you, and your welcome.
@skycarl2 жыл бұрын
Nice circuit explanation Rick. Showing the functions plain and simple.
@AllAmericanFiveRadio2 жыл бұрын
Hey Carl, hope your doing well. THANKS!
@oldradiotvsc9836 Жыл бұрын
Excellent explanation of the circuit, and better yet, great job at the graphics, using different colors to highlight the various signals involved!!
@AllAmericanFiveRadio Жыл бұрын
Thank you, and your welcome.
@stevescheberle2772 жыл бұрын
Very nice explanation and done in just 11 minutes, thank you!
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@Patrick-qm4xt2 жыл бұрын
Wow! Finally! I never understood how superheterodyne works, i could not get around the mistery. This is a very informative video. I get it now, it's not that hard to understand when it is explained like this. I am very gratefull for your video! Thank very, very much!
@AllAmericanFiveRadio2 жыл бұрын
I'm glad this video helps you understand the superhetrodyne. Thank you, and your welcome.
@Wil_Bloodworth11 ай бұрын
There is so much excellent information in this video that I had to watch it multiple times!
@AllAmericanFiveRadio11 ай бұрын
Thank you. You may like my FREE Ebook, it is PDF. Here is the password and download link: Password is allamericanfiveradio kzbin.info?event=channel_description&redir_token=QUFFLUhqa2hhVTRycWdJd1FUbTFCZWNmdGtQNlZCRmEzd3xBQ3Jtc0tuOFQ2bFhRcWdjdUdIcUREcnZFaHc0M2xURGhITVRuWDE2cGlDakdYUF9uODktNzc3TVRJTWdROUt6R3NLN2lla3hFS2lIM0RnOXR1dXFxMGx2cUNtWDhXb1Zvc2RCbGQxTThoendmN2E5R0lJdmI0Yw&q=https%3A%2F%2Fdrive.google.com%2Ffile%2Fd%2F1HHmaWYr7UMACfmS4W5uL6PADoem2KlRp%2Fview%3Fusp%3Dsharing
@rejeanmichaud6622 жыл бұрын
Merci beaucoup , Qu'elle souvenir .
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@phillipyannone31952 жыл бұрын
This great video I will save for when I get back to my Sparton model 61, a radio I have not been able to fix. Thank you!
@AllAmericanFiveRadio2 жыл бұрын
I hope you get the Sparton 67 working. Thank you, and your welcome.
@jimdawes72612 жыл бұрын
Well done as always, great teaching, thanks
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@jimnewman55962 жыл бұрын
A great review of the basics of the superheterodyne principals Rick. Thank you for the video.
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@garyceriotti8502 жыл бұрын
Excellent video thank you for posting
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@ehwestonful2 жыл бұрын
I had forgotten all about the really old Superheterodyne receivers that had tube filament voltages that added up to the mains voltage. One tube's filament opens and Poof, there goes the receiver until you pulled out the ole tube tester and found which one had opened up. I was glad when more radios started having power transformers to isolate the mains from the secondary power outputs.
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@RadioHamGuy2 жыл бұрын
Great explanation, thanks very much!
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@garyk.86742 жыл бұрын
Thanks for the video, it's hard to retain all that's going on in these radios. I still need to watch these type video's to learn and maybe someday remember what's going on in there.
@AllAmericanFiveRadio2 жыл бұрын
I hope this video will help. Thank you, and your welcome.
@heikojahn15062 жыл бұрын
Thank you very much for this excellent explanation. Thank you and best regards.
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@chrisdickens48622 жыл бұрын
A brilliant design, and wonderful presentation. Thank you sir!
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@acdcjustthebest....89802 жыл бұрын
Nothing less than fabulous !!! Always look forward to your uploads. Cheers
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@vvdvlas83972 жыл бұрын
Звук классный! Прям "ламповый"!
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@wifi4042 жыл бұрын
I learned something today!!! Excellent video!!!
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@LyonsArcade Жыл бұрын
Thank you sir, this is very helpful!
@AllAmericanFiveRadio Жыл бұрын
Thank you, and your welcome. I'm glad you found this video useful. I do have FREE eBook that also may find helpful and useful. The link is in the ABOUT on my KZbin site. Here is the information for the eBook. I hope you enjoy and find the information useful. PASSWORD is allamericanfiveradio drive.google.com/file/d/1HHmaWYr7UMACfmS4W5uL6PADoem2KlRp/view?usp=sharing
@Doctom912 жыл бұрын
Superheterodyne 101. Brilliant video!
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@stevemar79522 жыл бұрын
Excellent! Thank you.
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@rádiosantigos19582 жыл бұрын
Nice demonstration. One day, I will understand the superheterodyne working... Thanks.
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@afnDavid2 жыл бұрын
5:17 Centralab audio-plate. It is still possible to find old used databooks for those parts but you must really search for them.
@AllAmericanFiveRadio2 жыл бұрын
Thanks for the information.
@suhailasaba10517 ай бұрын
Thank you for your good explanation.
@AllAmericanFiveRadio7 ай бұрын
Thank you, and your welcome.
@denouch3582 жыл бұрын
I love your presentations, you explain things very well.
@AllAmericanFiveRadio2 жыл бұрын
Thank you very much, and your welcome.
@rob_scooter61992 жыл бұрын
thanks for the great explanation
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@Nail02552 жыл бұрын
Excellent explanation . Thanks a lot you are really a teacher
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@moselectronica67752 жыл бұрын
Una explicacion brillante,excelente canal!!
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@dimension27882 жыл бұрын
Mahalo Rick. I'm supposed to know all this as a general class ham. Nice brush up, its still fascinating to me.
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@AllAmericanFiveRadio2 жыл бұрын
I have a free ebook you may like. PASSWORD is allamericanfiveradio drive.google.com/file/d/1HHmaWYr7UMACfmS4W5uL6PADoem2KlRp/view?usp=sharing
@meraydin12 жыл бұрын
I am adding this video to refererence videos folder, first class explanation! ;)
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@jf-39452 жыл бұрын
Local oscillator TRACKS incoming station frequency such that the DIFFERENCE between the two signals IS 455KHZ. This is why the variable has 2 section GANGED together. Reason why a certain frequency picked had to DO with component size. RCA patented 455KHz so others had to pick another IF frequency so no royalties would have to BE paid. AVC influence has to BE kept low while peaking IF coils. Pick really faint station, pipe in the IF frequency and peak. LOL The rectifier removes half the carrier envelope so that the audio extraction can take place. There IS so much going on. Always learning. Good video info.
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@DavidSmith-zx7wz2 жыл бұрын
Great stuff! Sure wish I had you for a neighbor/elmer to be able to pick your brain! Thank You.
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@osmanmurativegen25262 жыл бұрын
Good job. Thanks.
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@wagsman9999 Жыл бұрын
Very nice explanation.
@AllAmericanFiveRadio Жыл бұрын
Thank you and, your welcome.
@JoaoPaulo-ns7dj2 жыл бұрын
Obrigado
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@johnathanasiou92842 жыл бұрын
Great explanation & walkthrough, Rick. Would it be fair to say that the AVC capacitor could supply a signal strength meter (with resistor dividers)?
@AllAmericanFiveRadio2 жыл бұрын
Yes that would be a good place for a meter. Thank you.
@parochial23569 ай бұрын
I was slightly confused by your statement that "The secondary is hooked up to a diode". I searched from the output of the secondary's coil thru the circuit but did not see a diode anywhere. Then, a little research for the 12AV6 tube data reveals that this tube contains both a triode and 2 separate diodes - internally, the diodes being connected to tube pins 5 & 6. Looking at your diagram, pins 5 & 6 do appear to show as diodes inside the tube. Therein lay my confusion, the IF secondary is hooked to a diode, which is integral to the tube, not a distinct, external component separate from V5. I may be dense but perhaps this will help another so confused. Great video otherwise.
@AllAmericanFiveRadio9 ай бұрын
The top wire of the secondary goes to pin#5, that’s the diode. The tube 35W4 is also a diode.
@sgifford10002 жыл бұрын
I can smell the circuitry!
@AllAmericanFiveRadio2 жыл бұрын
Yes! Thanks.
@manojt.r882 жыл бұрын
very nice explenation sir thank u ,,
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@1mctous2 жыл бұрын
If you've tuned a really old radio without AGC then you'll appreciate what it does.
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@andrewferg87372 жыл бұрын
I found an old guitar amp in the trash the other day. It contains a 12AX7a Twin Triode. I have no idea what to do with it. I'll have to re-watch all your tube amp videos!
@AllAmericanFiveRadio2 жыл бұрын
Ask your questions. How to count tube pins is in appendix of my free ebook, figure A-3 page162' my email allamericanfiveradio@yahoo.com
@makarov1382 жыл бұрын
I have often wondered why it was that automobile radios had a 262khz IF strip. Would you happen to know the answer for that? I'm stumped on it. My 1972 Philco Ford AM only radio has it. Great radio by the way. Very selective and sensitive.
@jocelynruel12482 жыл бұрын
It‘s could to have more sensitivity (more IF gain) better selectivity and better noise réjection from ignition coil and alternator
@AllAmericanFiveRadio2 жыл бұрын
Sometimes it also has to do with patent infringements.
@SatishVasaneАй бұрын
Nice video
@AllAmericanFiveRadioАй бұрын
Thank you, and your welcome.
@ronpearson1912 Жыл бұрын
So in the first tube starting at the bottom you have the cathode which feeds the inductor that feeds the tank circuit. You mentioned this was DC power but the inductor needs AC current if the local oscilator is to function? Also if I understand correctly the screen grid is the transmission signal and the control grid is mixing the LO. What are those other 2 grids that appear to be coupled together on pin 6 of the first tube, they appear to be part of the IF tank circuit?
@AllAmericanFiveRadio Жыл бұрын
Hey Ron, we must be amphibious or something. I am currently working on drawings for the oscillator circuit. I had a request from a KZbinr to go through the oscillator circuit in more detail. I'm hoping to be able to upload a video may be this Sunday. I'll try to remember to let you know when I have uploaded a video in a comment on this video.
@AllAmericanFiveRadio Жыл бұрын
Just put up this video. Radio Oscillator Tank Circuit kzbin.info/www/bejne/Y4KQmKmeeteembs
@ronpearson1912 Жыл бұрын
@@AllAmericanFiveRadio Thank you so much, this is super helpful to build my intuition of how this works. Once I get about 80% on the tube heterodyne I have to learn the solid states. We have a Harris HT20 and BT35 Transmitters
@AllAmericanFiveRadio Жыл бұрын
@@ronpearson1912 Thank you! Good luck with the transmitters!
@ronpearson1912 Жыл бұрын
@@AllAmericanFiveRadio What is your name?
@ronpearson1912 Жыл бұрын
Could it be said that the capacitor to ground is a high pass filter sending high frequencies to ground? But you were talking about amplitude of the signal not frequency
@AllAmericanFiveRadio Жыл бұрын
Yes it is a high pass filter. But a more accurate term is RF bypass. Because you can have high pass filters in audio, like in your speaker network.
@12DGJB212 жыл бұрын
What is meant by "high que"? (not sure if my spelling is correct).
@AllAmericanFiveRadio2 жыл бұрын
Q Factor en.wikipedia.org/wiki/Q_factor Thanks
@bob_mosavo Жыл бұрын
Thanks 👍
@AllAmericanFiveRadio Жыл бұрын
It's important to have an over view!
@RONWOLPA2 жыл бұрын
All american 5 is a clever design to keep the cost to a mininum in detriment of the security.
@AllAmericanFiveRadio2 жыл бұрын
Thank you.
@W1RMDАй бұрын
I am watching this now (again) to help understand my Silvertone 701 1940 floor model restoration I'm doing. While it's not an AA5, I'm trying to understand a couple of things..... One, what is the diode on pin 6 on the 12AV6 for? I just goes to ground. And inside my second I.F. transformer, according to my schematic there is a 150 pF capacitor between the bottom of the secondary and ground to filter out any remaining 455 Khz energy. The schematic claims that the capacitor is inside of the I.F. can, yet I can't find it anywhere. It would serve the same purpose as C8A, the 220 pF capacitor on this schematic. Could it be that they don't need this due to the stray capacitance of the I.F. can housing itself provides this capacitance, ergo no need for the capacitor.? I am not done with this restoration and I've had this I.F. can apart and replaced the hook up wiring and resistors (47k and 330k), but no sign of this capacitor. The 47k resistor is also inside this can, so if I were to add the capacitor to the circuit, I would have to take the can back apart to install the cap before the 47k resistor. Also, I have never run this radio. It was a $15 Salvation Army special. (awesome store and organization) Thanks Rick!
@AllAmericanFiveRadioАй бұрын
The diode on pin 6 is not used and is grounded to keep it from making noise. The capacitor in the I.F. maybe built in the base of the I.F.. You can contact me at allamericanfiveradio@yahoo.com
@W1RMDАй бұрын
@@AllAmericanFiveRadio Okay, thanks. Have a great day and 73!
@PatrickInCayman2 жыл бұрын
Awesome stuff Rick! FM Next? ;)
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome. Good idea.
@thecriss882 жыл бұрын
Could you do the same explanation with a transistor based circuit? Great video BTW.
@AllAmericanFiveRadio2 жыл бұрын
I was thinking about this. Thank you, and your welcome.
@AllAmericanFiveRadio2 жыл бұрын
Transistor superhetrodyne radio is the same technology as vacuum tube radios, the voltage is different.
@sahhaf1234 Жыл бұрын
can you also prepare one for the all japanese 6 transistor radio?
@AllAmericanFiveRadio Жыл бұрын
Thank you. I'm looking for one.
@Pilotfly20232 жыл бұрын
tks!...
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@cornelishummel79872 жыл бұрын
Hi there hope your fine greetz cor
@AllAmericanFiveRadio2 жыл бұрын
Thank you, and your welcome.
@garygranato91642 жыл бұрын
cant see the diode near V5 ?
@AllAmericanFiveRadio2 жыл бұрын
V5 PIN5
@garygranato91642 жыл бұрын
@@AllAmericanFiveRadio cheers AA5R
@BadChizzle2 жыл бұрын
@@AllAmericanFiveRadio So inside V5 is the diode, when it’s connected thusly? Ah ha… tricky that. I had to look up the tube to research it and find it has two diodes in it. I searched your diagram a long time for a diode on its own. Ha ha
@Wil_Bloodworth11 ай бұрын
It might be helpful to explain what "High Q" means and what a "tank circuit" is... as those might not be common knowledge in this century.
@AllAmericanFiveRadio11 ай бұрын
Oscillators, the Basic Tank Circuit 1 kzbin.info/www/bejne/nIKXqoWMet-Lh6M LC Tank Circuit kzbin.info/www/bejne/bqfYaop6n6d0ntE AM Transmitter Tank Circuit Coil Capacitor Resonance kzbin.info/www/bejne/bIW1ooGhiZqCec0 Radio Oscillator Tank Circuit kzbin.info/www/bejne/Y4KQmKmeeteembs
@Wil_Bloodworth11 ай бұрын
Thank you sir@@AllAmericanFiveRadio
@Wil_Bloodworth11 ай бұрын
That 2nd video seems to be private.@@AllAmericanFiveRadio
@SatishVasaneАй бұрын
Sir you didn't answer my question
@AllAmericanFiveRadioАй бұрын
Whats the question?
@SatishVasaneАй бұрын
@@AllAmericanFiveRadio I repeat, I have a tape recorder Silver TX 100 made by Shin Shirasuna japan, I want it's schematic diagram for tone control and output transistor number which is changed by the previous owner, so please help me
@AllAmericanFiveRadioАй бұрын
@@SatishVasane I found your tape recorder on Radiomuseum but there is no schematic. www.radiomuseum.org/r/silver_solid_state_cassette_recorder_tx100.html
@SatishVasaneАй бұрын
@@AllAmericanFiveRadio yes I know the website. If you found any details about the tape recorder please share with me. And thanks for your valuable time spend for searching the schematic.