The current path through an AA5 radio and the different grounds

[@itsjojo4]

Thank you Dennis I just watched a video on schematics and it really helped me out a lot on the aa5 radios. You took your time and went through things very clearly I did hit the Subscribe button too thank you

[@pinballpsycho]

Great! You've cleared up a few points of confusion for me, particularly on how the circuit return might be depicted on ground return radios (like my Zenith where it's just ground symbols). So thank you! I'm still a bit confused about one thing (well, actually a lot of things): where we say that one of the ways in which you can spot the return path is by looking at the cathode connections (makes sense), and yet the rectifier cathode connects to the plate of the next tube (through a couple of field coils) and appears to be on the B+ line. The first drawing is an excellent point of reference, with the red line you've drawn. I'm trying to think of the coils as smoothing the B+, but I can't conceive of how it gets to be plus to begin with.

[@electronicsoldandnew]

I’m sorry to contact you here, but I just wanted to thank you for your influence in the development of my passion for tube radios, which has let to the development of my channel. I noticed that you have subscribed to my channel, and cannot fully express how honoured I felt when I noticed that fact. When I started looking at tube radios, yours was one of the main channels that I learnt from, and served to add a new aspect to my knowledge of electronics. I attended university well after the tube era, so learning from your unique style of teaching was a great complement to one of the wisest statements made by one of my lecturers: you’ll leave university having learnt one thing only, and that is “how to learn”. His words have proven very true, and your explanations have proven an easy and enjoyable means of confirming his wisdom. Once again, my sincere thanks for your assistance.

[@erguy6319]

Well explained. Great teaching video. Thank you very much.

[@williamstevens7090]

Thanks to your explanations, I finally understand B+ and B- and how they relate in the circuit.

[@DannerPlace]

Very helpful, thank you for posting this.

[@daleaylward2269]

I’m recently retired and getting into the hobby of vintage radios and have been doing lots of studying, KZbin videos etc. I recently stumbled across one of your videos on schematics and have found it to be extremely helpful, easy to follow and understand and you’ve cleared up many questions I had. thank you for the time you spent on these videos and I look forward to going through many more on your site.

[@RickCoker30564]

Just found your videos … Thanks for the resource, I’ll be watching many more of them. Very useful information!!

[@francismannion7075]

Thank you Dennis that cleared up a few points of confusion for me. Your videos are really interesting and very informative.

[@frankmooney7282]

Hallicrafters Continentals also used coil wrapped around capacitor to isolate b- from chassis. Couldn't figure its purpose out. Thanks for explaining it. I have 2. One keeps burning 820 ohm resistor between electrolytic caps and can't find the short problem.

[@efrank2714]

Thanks Dennis, can't tell you what a surprise it was to find your response to my question. You're the BEST!!!

[@GeorgeChristofi]

Many thanks for this video. It has helped me to understand the path on the Eddystone 840 Im working on. The scary thing to me is the Metal box the live chassis is in. Take care and glad to have you back.

[@robertfakler8564]

Thanks. This video is the only I've found that tells what a B+ and B- circuit is. I'm still looking for info on which circuits are AC and which are DC.

[@richardbrown9522]

Thanks for your effort and time to produce these videos. Your videos are extremely helpful,

[@opus1952]

Thanks for the video Dennis, putting out some good stuff here.Best regards from the UK

[@mikeh2599]

Very timely video for me, I would like to (selfishly I admit) suggest that your next video on multi-function switches use the schematic for the Zenith 5R312 Beehive radio. This one has been kicking my butt for a year. Thanks, I always learn something from your videos.

[@normanwalz8636]

Thanks again. Looking forward to the multifunction switch video. These also give me problems on schematics.

[@Backtothefutureradios]

Thanks Dennis! Cleared some stuff up for me. Take Care--Larry

[@davidlegault9745]

Very informative, thank you Dennis. Regards, Dave

[@phillipyannone3195]

That was perfect, just what I was looking for. The grounding or B- has been a real stumbling block for me. Thank you for your excellent video. I noticed you haven’t published any videos lately I do hope that all is well and you are just busy making money. Cheers

[@juliotorres5386]

Thanks for the well explained schematic video. As a newbie messing around with tube radios I really enjoy watching and learning from videos like these. Quick question regarding the capacitor you mentioned that is locking down the floating chassis at 20:50. I’m currently working on a radio that has this type of circuit and is labeled as “RF Choke”. My problem is that the capacitor is leaky and needs to be replaced. Can I install a regular metal film cap and remove the coiled wire? Thanks in advance and keep the videos going.

[@barn5923]

Thanks Dennis love your videos

[@johnmcgiv1]

Very well done video and explanation thank you so much for your time. Just a quick question please when I measure from chassis to B- I get 30ohms their is also a -1.8v . Should I reference measurements to chassis or B- Many thanks again Dennis for your help.

[@efrank2714]

Even better Dennis, you pulled out a Philco schematic and I'm rewiring a Philco 42 pt-7. The Ryders can be vague to say the least.

[@mikethuman9456]

Very well done,thankyou

[@hlbjoker]

Great video old man! Keep it up!!!

[@efrank2714]

Dennis toward the end of the AA5 current path video on the last schematic you use, when you talk about the front end there is a ground symbol below cap 1A as well as various other points. Is that ground tied by wire to B- or is it connected to the actual chassis as you described the cap\coil #21? Sorry to beat a dead horse but I want to get it right. Would it make a difference if all ground points on a whole radio were tied to AC line neutral. Also wondering if each tube of an AA5 can be visualized as a separate circuit, supply B+ to B- return.

[@krr868]

When an AA% radio is repaired there have been discussions about installing safety capacitors, X and Y. Could you please draw in a modification with yours installed?

[@STEVEWALKER-c3g]

How to rewire safety