Thank You. I watched the prior video and I gave it a 👍 but didn't leave a comment. Just wanted to say that you are clearly an excellent instructor and it's informative and refreshing to watch your videos. Again, thank you! 👍👍👍!
Thank you very much Sir, A huge help in understanding these tube radio circuits. I love to bring back to life and hear the, True American made tube radios. Nothing like it.
worked for many years in the Coast Guard as an Electronics Tech with AN/FPN-44 LORAN transmitters... multistage push-pull tube amps with F1086 water cooled final PAs with 21.5KV plate voltage, putting out massive power. great video and explanations. It is definitely a type of electronics which is being forgotten in today's world.
I am a retired electronics tech. It is nice to see someone who actually knows what they are talking about in this video. There are to many want-a-be's making videos that don't understand electronics but they think they do.
Excellent presentation. Ty. Takes me back to tech high school days when tube theory was taught in 10th through 12th grade along with dc and ac theory. I still have my required RCA tube manual book from those high school days!
Well Ill drop a second comment, this was very helpful! I just bought an old National NC183D and while watching thi video I was also looking at the schematic of my 183D, I pretty much understand everything that is going on now. This radio was a cadilac in its day, it has 2 rf amplifier stages (6BA6), double pentagrid conversion (6BE6), and and 3 IF stages (6BA6). than it has phase inversion (6J5), and a pair of 6v6gt in push pull on the audio output. Plus other bells and whistles.
Excellent explanation especially on push pull and the different classes of amplifiers, I never did understand it, but you made it clear and easy to understand. I’ll be watching this one more than once to fully understand it and recommend to others.
Интересно слушать лекцию об устройстве ламповой техники через 80 лет после ее создания! Тем боле, что самому уже за 60 лет! It is interesting to listen to a lecture on the device of lamp technology 80 years after its creation! All the more so that he himself is already over 60 years old!
Thank you for the kind comment. I am trying to pass on things my early mentors taught me when I first started. You might like to look at the playlist I recently created on the Westinghouse AM/FM radio restoration as it presents a method of breaking a radio into parts to speed up troubleshooting. Now that I have figured out how to do playlists I think I will use them more since it makes viewing related videos easier. Good luck with your restorations!
Thank you. I been having difficulty penetrating tube radio operation and this has taken me a long way ahead. I’ve just bought a Grundig 5077 and it needs some help. I desperately want to be the one who can understand and fix it. Getting there. Thanks for the help.
Hi Tom, did you ever get around to explaining about the cathode bypass capacitor and the frequency response? Seems to me it is more about gain actually.
I do not understand why did they use a pentode with high u at a matching stage and a triode at an amplification one. Because it seems that it must be an opposite: two parallel triodes at the matching stage and one pentode (but rather a beam tetrode) at the amplification stage.
I have the chair side radio version of the 38-4, what a complicated tuner mechanism. Mine still doesn’t work. Nothing coming from the speakers... not even hum
Hi Sir , i am confused on how the signal negative gets amplified through the amplifier as when signal is negative the plate becomes positive and does not reverse. Am i wrong
I believe he mentioned in an earlier video that most of them were from an old military technical manual from the 50s that he used to use as a textbook back in his army days. It's neat stuff. :)
Thank You. I watched the prior video and I gave it a 👍 but didn't leave a comment. Just wanted to say that you are clearly an excellent instructor and it's informative and refreshing to watch your videos. Again, thank you! 👍👍👍!
I've watched a lot of videos to understand the signal flow through a radio, and this is the best, the clearest that I have watched. Thanks!
Thank you very much Sir, A huge help in understanding these tube radio circuits. I love to bring back to life and hear the, True American made tube radios. Nothing like it.
worked for many years in the Coast Guard as an Electronics Tech with AN/FPN-44 LORAN transmitters... multistage push-pull tube amps with F1086 water cooled final PAs with 21.5KV plate voltage, putting out massive power. great video and explanations. It is definitely a type of electronics which is being forgotten in today's world.
so amazing information thank you for your highly appreciated efforts
I am 72 and have been out of electronics for a long time. Back to school watching these. I wish the Hallicrafters S-38 had an rf amp.
Standing on the shoulders of giants! You sir are a rockstar!!!!!
I am a retired electronics tech. It is nice to see someone who actually knows what they are talking about in this video. There are to many want-a-be's making videos that don't understand electronics but they think they do.
Thank you for sharing all this information on tube theory and applications in Am radio receivers. Your teaching skills are superb.
EXCELENT PRESENTATION I WAS ONE OF THE LAST TO HAVE TUBE CICUITS IN COLLEGE.THIS HAS BEEN A GOOD REVIEW FOR ME.
Excellent presentation. Ty. Takes me back to tech high school days when tube theory was taught in 10th through 12th grade along with dc and ac theory. I still have my required RCA tube manual book from those high school days!
Well Ill drop a second comment, this was very helpful! I just bought an old National NC183D and while watching thi video I was also looking at the schematic of my 183D, I pretty much understand everything that is going on now. This radio was a cadilac in its day, it has 2 rf amplifier stages (6BA6), double pentagrid conversion (6BE6), and and 3 IF stages (6BA6). than it has phase inversion (6J5), and a pair of 6v6gt in push pull on the audio output. Plus other bells and whistles.
Excellent explanation especially on push pull and the different classes of amplifiers, I never did understand it, but you made it clear and easy to understand. I’ll be watching this one more than once to fully understand it and recommend to others.
Thank you so much for these teaching videos.
@ tomtektest I find you to be a very, very good and experienced teacher and I want to Thank you the uploads of yours.
Thanks and Best Regards ;-) :-)
Great video! Love your clock chiming in the background. Reminds me of when I was younger and we had a grandfather clock.
Fantastic content keeping the art alive!
Thank you very much for this interesting and intelligible video. I made big steps in understanding tubes circuits by listening to you.
Интересно слушать лекцию об устройстве ламповой техники через 80 лет после ее создания! Тем боле, что самому уже за 60 лет!
It is interesting to listen to a lecture on the device of lamp technology 80 years after its creation! All the more so that he himself is already over 60 years old!
Entire encyclopedia in this video amazing 🤩
Thank you for very clear well presented lesson and I love the schematics you have their very well Illustrated thank you
Excellent easily understand presentations....
Thank you so much!!! I have been fixing tube radios with a multi-meter poke, and guess work this helps immensely
Thank you for the kind comment. I am trying to pass on things my early mentors taught me when I first started. You might like to look at the playlist I recently created on the Westinghouse AM/FM radio restoration as it presents a method of breaking a radio into parts to speed up troubleshooting. Now that I have figured out how to do playlists I think I will use them more since it makes viewing related videos easier. Good luck with your restorations!
GREAT VIDEO thank you
Thank you. I been having difficulty penetrating tube radio operation and this has taken me a long way ahead. I’ve just bought a Grundig 5077 and it needs some help. I desperately want to be the one who can understand and fix it. Getting there. Thanks for the help.
Great information great work... thanks for posting...l love it..
Excellent and very interesting video. Thanks for share !
Thank you so much for the lessons. I would love to find this book that you are using for examples
Excellent video thank you sir, I learned a lot.
Amazing video
Very clear explanation!
Great thank you
Great explanations.
good work well explained
great leaturer, thz a lot！👍👍
Hello Sir. Just found your channel. I subscribed,Liked,Shared and added to Playlists.
All my best.
Bobby
Thanks for sharing
Thank you
Hi Tom, did you ever get around to explaining about the cathode bypass capacitor and the frequency response? Seems to me it is more about gain actually.
I do not understand why did they use a pentode with high u at a matching stage and a triode at an amplification one. Because it seems that it must be an opposite: two parallel triodes at the matching stage and one pentode (but rather a beam tetrode) at the amplification stage.
Are u in cent Tx. I am in Bastrop cent Tx
I have the chair side radio version of the 38-4, what a complicated tuner mechanism. Mine still doesn’t work. Nothing coming from the speakers... not even hum
WHY IS THERE KNOW SUPPRESSOR GRID IN THE PENTAGRID CONVERTOR?
Hi Sir , i am confused on how the signal negative gets amplified through the amplifier as when signal is negative the plate becomes positive and does not reverse. Am i wrong
👍👍🙏😊
Where did these schematics from?
I believe he mentioned in an earlier video that most of them were from an old military technical manual from the 50s that he used to use as a textbook back in his army days.
It's neat stuff. :)
Get in touch. We have same interests and I am in Bastrop Tx
Hi Tom can sent this drawing for me charge me how much all the circuit
Aw. You bet. I got coned too as dad asked for power of attorney. When I got drafted. Lost my corvairs..
Thank you