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 Post subject: Components Swapouts
PostPosted: Aug Fri 24, 2018 2:29 pm 
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Joined: Aug Thu 23, 2018 3:34 pm
Posts: 14
I am looking for anyone that can help me understand components.

I have built in my Ham lifetime dozens of kits. And serviced broken radios. But it has always amazed me about the components. Like Resistor 222, why is it 47 ohms and not any other value? Or Coil L 3 why is it 55 turns of 28 ga wire close spaced on a 2 inch form. what would you change if the only form you had was 2.5 inches? why not any other values or say same items that are best for 40 meters, what do you change for 30 meters? Anyone?

More or less, what my goal is to take some ultra basic old Tube designs of simple equipment, Some are super simple like two tubes and maybe a total of a dozen support components, but change it out from a Tube to a transistor. There has to be a transistor that can do the job that any tube did.

But the mystery to me is to learn What Transistor to replace tube "X" and then the support perferial components what needs to change to work with the new transistor?

Joe WB9SBD


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 Post subject: Re: Components Swapouts
PostPosted: Aug Fri 24, 2018 3:17 pm 
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Joined: Jul Mon 26, 2010 8:30 pm
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Location: Annapolis, MD
Only one thread per topic allowed....please go here:
viewtopic.php?f=12&t=345408

_________________
-Mark
"Measure voltage, but THINK current." --anon.


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