How to simplify tube radio schematics.

[@harryshector]

This is what military technical manuals do. It is a tremendous aid to understanding how a circuit works, and how to troubleshoot it. Great video!

[@electronicsoldandnew]

Thanks

[@greggaieck4808]

Electronics old and new your tube videos are awesome iam give you 👍👍👍👍👍👍👍👍👍👍👍

[@poormanselectronicsbench2021]

Your skill at breaking down schematics, as well as editing them into sections, and sharing the info in an understandable manner, like i said before, is truly second to none on here. I've played around with editing schematics before with a photo editing software, but I am VERY clumsy at erasing stuff, even though I consider myself fairly computer literate. Thank you for covering this in a very digestible manner!

[@electronicsoldandnew]

My pleasure

[@ralphmans]

How does it feel to be a genius? It’s also very nice that you reply to comments and questions, extremely considerate of you, thanks much.

[@electronicsoldandnew]

I don’t know, as I’m far from attaining that status 🙂 my pleasure

[@jimburns348]

Excellent technique. A good sign of thinking outside of the box. Yudaman!

[@electronicsoldandnew]

👍

[@JacGoudsmit]

It's interesting to see that while you reduce a schematic like this, you start noticing all kinds of places where a signal makes a silly U-turn or detour. I bet that's not a coincidence: probably the engineers in the 1950s and 1960s who had to draw this all by hand, started out more or less with the schematic that you end up with at the end of the video. They probably had a cabinet full of drawings of previous models of radios that they could start with, and they probably copied them by hand on a drawing table with some templates for things like tubes and resistors. Then they added features to the circuit such as the FM tuner so they had to erase a line and extend it to a new location, etc. Interesting video! Thanks for posting.

[@electronicsoldandnew]

pleasure

[@fredflintstone8048]

Very nice. Thank you for sharing your methodology. You mentioned that the simplification not only makes it easier to understand, and I agree, but also makes it easier to troubleshoot. My only issue in that regard is removing the switch contacts from the drawing. The circuit runs through the switches so those would be points for identifying parts of the circuit and places to run tests. I feel that removing the switch contacts from the drawing and replacing with a solid line would add to confusion, and would require that we look at some other layer to find them on the drawing. Leaving them in the circuit and also changing if necessary the position of the switch for running in a mode that the diagram would require would be more helpful for the troubleshooting aspect of the work.

[@electronicsoldandnew]

Very good point.

[@michaelclutton8446]

Thanks for the video, it really helps me understand how sections of the radio work. I certainly learned from this

[@electronicsoldandnew]

pleasure

[@mackfisher4487]

Manuel, "Brilliant" this is one of the reasons why your channel is so popular your practice of simplifying a circuit and then discussing it during your restoration process is a great teaching aid for your followers. (Not all your secrets) For Instance how is it that you are so easily kidnapped?

[@electronicsoldandnew]

I live on an island where we trust too deeply, surrender too readily, and accept our fate too easily. Hence any beautiful woman who spins a yarn can get us into her web with very little effort 😊

[@Simon-mz7sf]

Thankyou. I used the program called snip to select the section of pdf and Microsoft paint to simplify a schematic of a Sanyo Road-master 10g radio after seeing your presentation. Amazing results. I removed all the unwanted FM section so i could understand the AM auto dyne layout. This helped me pinpoint an open secondary on the mixer transformer. troubleshooting with the native schematic was doing my head in for days. Your approach helped me greatly. So Thank you!! I owe you a beer.

[@electronicsoldandnew]

Glad to hear that it helped you. 👍

[@vasilification]

Developing the skill to do this will greatly improve understanding of how a radio works. It also simplifies restoring them. Thank you for the great video. Will use this technique on my next restore.

[@electronicsoldandnew]

👍

[@chrisclark6192]

Hi Manuel, superb stuff as always. Some schematic diagrams are confusing and a nightmare to follow. To be able to remove the bits you don't need and enlarge what you have left, can only be a good thing. The way you present and explain schematic drawings on your restorations is certainly educational and makes things a lot easier to follow. Again thoroughly enjoyed watching. Cheers Chris.

[@electronicsoldandnew]

Thanks Chris

[@thecrossmethod6192]

Thanks for these videos. I recently refurbished a radio into a bluetooth speaker thanks to your videos and it sounds great.

[@electronicsoldandnew]

👍

[@KeritechElectronics]

Nice one. I tend to use the PnPMAD (Pen and Paper Manually Assisted Design) for all kinds of schematic work, analyzing the circuit band by band, drawing the functional blocks (the whole radio's block diagram, then going deeper into the input filters, oscillator etc.). The original schematic is very nice and clean to start with, the Dutch or German school, just like I like them - perfectly understandable to me, but then I've been doing the tube thing for almost twenty years now (and I still know very little compared to e.g. Mr Carlson's Lab). The most problematic diagrams, in my experience, are those where the designers tried to cram it all into as little format as possible, or those that don't simplify the ground connections or wafer switches, drawing them explicitly. Oh my, that can be a pain in the ass to decipher both in radios and amplifiers. Seeing a lot of this in '40s/'50s Polish radio schematics.

[@electronicsoldandnew]

I agree. Some schematics are so compacted that J sometimes want to just re-draw them from scratch 😊

[@davidgrey943]

Great thanks for the link and got the system working 100%. The video was simple and easy tounderstand great effort.

[@electronicsoldandnew]

Great

[@tubeDude48]

A big applause! Well done!

[@electronicsoldandnew]

Thanks

[@johnblystone8781]

Interesting methodology. Thanks for sharing!!! John

[@electronicsoldandnew]

My pleasure

[@AndySpicer]

That was incredibly useful. Thank you!

[@electronicsoldandnew]

Pleasure

[@rádiosantigos1958]

Nice explanation! Thanks.

[@electronicsoldandnew]

Pleasure

[@murrij]

Thank you so much for your work on this.

[@electronicsoldandnew]

my pleasure

[@edmaster3147]

Great vid as ever. Very useful tips, learned something :). Thank you.

[@electronicsoldandnew]

Always a pleasure, Ed.

[@brianmiller6320]

Nice video, I wholeheartedly agree that tube circuit diagrams of multiband receivers “look” overly complicated, they have always been drawn this way.

[@electronicsoldandnew]

👍

[@ralphmans]

Especially the German radios.

[@electronicsoldandnew]

😊

[@greggaieck4808]

Electronics old and new your tube radio schematics are cool

[@electronicsoldandnew]

👍

[@Timothycan]

Thanks for that, very helpful.

[@electronicsoldandnew]

my pleasure

[@erikdenhouter]

No comment on the methode, great show, but a small squeak came out of my mouth at 12:25 when you started to erase S17. That transformer coil carries DC for the AM too, so when there would be a short to ground inside that can you could overlook it 😛

[@electronicsoldandnew]

True. The “full erase” is more for circuit analysis and understanding, but it does overlook a few fault points that could occur if the set is not functioning.

[@erikdenhouter]

@@electronicsoldandnew Aha, that is a difference 👍🏻

[@electronicsoldandnew]

👍🏼

[@SatishVasane]

Thanks

[@josealeixes2861]

Ótimo parabéns professor

[@electronicsoldandnew]

obrigado

[@electronicsoldandnew]

Tenho boas notícias. As lâmpadas chegaram e já instalei. Está todo empacotado para enviar. Mande-me sua morada exacta via meu email. Vou saber o custo de envio e depois informo do total a transferir via paypal. Abraço, Manuel

[@danielsaturnino5715]

I cant find the "all that jazz" button :) has youtube remove it? Thanks for the video

[@electronicsoldandnew]

😊 That, and the dislike button count

[@elamriti]

any one can advice me ,i need a replacement for those black cannons 2200pF/1300v < cant find it

[@electronicsoldandnew]

Use two 4700pF/630V in series.

[@piscesthatsme20]

Hi, By any chance is there service manual available for Sony TFM 1600 radio. If you can guide me to find it would be really helpful. Thanks

[@electronicsoldandnew]

search for it on nvhr.nl

[@piscesthatsme20]

@@electronicsoldandnew thanks alot Sir. I got it. Great fan of ur work.

[@electronicsoldandnew]

👍

[@psionl0]

It looks like you can do what you did using xpaint or mspaint (just make copies of the files).

[@electronicsoldandnew]

True. There are a lot of free apps you can use. Gimp is one I also have.

[@psionl0]

@@electronicsoldandnew I'm a simple guy. That's why I mentioned it.

[@electronicsoldandnew]

👍