The PHILCO Phorum
Radio signal path - Printable Version

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Radio signal path - WyTex - 12-12-2019

Howdy fellas -

In a continuing effort to educate myself on tube radio restoration and repair I've been reading Marcus and Levy's Elements of Radio Servicing.  Not having been formally trained in this field I've been searching for a comprehensive explanation of a radio signal path as it enters the antenna, flows through each tube and stage and finally out the speaker.  Is anyone aware of this type of reference article that I could study?  I'm struggling to identify the specific tube pins this path takes which is a fundamental skill I need to improve.    

Thanks and Merry Christmas,
Paul

RE: Radio signal path - Radioroslyn - 12-12-2019

Hi Neighbor,
Give this a whirl it's a good explanation on how the the mixer or frequency convertion works. https://www.youtube.com/watch?v=hz_mMLhUinw&feature=youtu.be&fbclid=IwAR1ZSxW29xSo6qENpGo1mJrlGZc33KLjAOiukCvbJcefDspizdMcjJUhSYc
Generally speaking in terms of what pins are are for what the pin that is connected to the grid that is closest to the filament or cathode is called the control grid. This is generally the input to the tube. The pin that is connected to the upsidedown T thingy is the plate. That is the output.

Any questions give me a call I'm in the book[Image: https://philcoradio.com/phorum/images/smilies/icon_lol.gif]

RE: Radio signal path - KCMike - 12-12-2019

Hello, Good video link Terry. Here is another vid you might have a look at about signal flow.
https://www.youtube.com/watch?v=zknp0FOkPXU

RE: Radio signal path - mikethedruid - 12-12-2019

I suggest you buy a copy of Audel's Radioman's Guide. It can be found on Amazon and eBay at a reasonable price. It covers the entire subject in clear, practical terms, and is a lot easier to deal with than Marcus & Levy.

RE: Radio signal path - WyTex - 12-16-2019

Hi Terry - thank you very much for that link! It's very helpful and is a bit easier to digest than what I'm currently reading. I might take you up on that phone call offer! Icon_smile

Also, thank you Mike for the additional information. Very much appreciate the help.

Regards,
Paul

RE: Radio signal path - Radioroslyn - 12-16-2019

And they use a Philco PT-7... Somebody needs to send him a knob.