Brushed motor diode/cap/???

Brushed, nicad, radios, etc...

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Andybellus
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Brushed motor diode/cap/???

Post by Andybellus »

School me on the need and “how to” for a diode? Cap? Not sure what it’s called that was added to a brushed motor back in the day. I think it was to reduce radio interference? Still needed today?

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Re: Brushed motor diode/cap/???

Post by GoMachV »

Caps were used either in a pair or trio for motor noise. Not needed on modern radios. Shottkey diode was only used with forward only speed controls to assist with braking.
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Re: Brushed motor diode/cap/???

Post by morrisey0 »

For recreations of older cars, yes, still needed ........... for looks.

For any functional purpose with modern radios, nope.
I build RCs like people would have done back in the '90s ..................................... if they had 3D printers.

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Re: Brushed motor diode/cap/???

Post by juicedcoupe »

You guys put modern radios in vintage cars? Eww.

Most of my stuff still uses 27 and 75mhz AM radios. Using modern stuff just doesn't feel right.

And while I do have a fairly large collection of vintage transmitters, most of my runners use a Futaba T2PL, JR XR2i, or Airtronics MX-A (also have a Kyosho variant), which I have 2 or 3 of each. The XR2i is probably my favorite, it just feels right.
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Re: Brushed motor diode/cap/???

Post by Andybellus »

Thanks guys!

Yeah I’ll be using a modem remote for my JRxT runner with a modern Hw ESC and 13.5 so no worry’s there, but still looking for a Reedy Mr A or B for my RC10T so will want that to be correct-ish looking…

Not a purist and neither are exact replicas so don’t care for the old radios hahahaha

Maybe I shouldn’t have said that, I hope you guys will still answer my dumb questions? 😂

Happy Friday!

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Re: Brushed motor diode/cap/???

Post by RC10th »

Well, modern radios are technically safer for old cars, nothing worse than a bad glitch or runaway which causes you to break something rare, hard to find and expensive....
I was old school - when old school wasn't cool !

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Re: Brushed motor diode/cap/???

Post by Dadio »

Andybellus wrote: Fri Oct 06, 2023 10:39 pm Thanks guys!

Yeah I’ll be using a modem remote for my JRxT runner with a modern Hw ESC and 13.5 so no worry’s there, but still looking for a Reedy Mr A or B for my RC10T so will want that to be correct-ish looking…

Not a purist and neither are exact replicas so don’t care for the old radios hahahaha

Maybe I shouldn’t have said that, I hope you guys will still answer my dumb questions? 😂

Happy Friday!
I've always thought it's better to look stupid than be stupid , always ask :!:
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Re: Brushed motor diode/cap/???

Post by TRX-1-3 »

Dadio wrote: Sat Oct 07, 2023 3:51 am
Andybellus wrote: Fri Oct 06, 2023 10:39 pm Thanks guys!

Yeah I’ll be using a modem remote for my JRxT runner with a modern Hw ESC and 13.5 so no worry’s there, but still looking for a Reedy Mr A or B for my RC10T so will want that to be correct-ish looking…

Not a purist and neither are exact replicas so don’t care for the old radios hahahaha

Maybe I shouldn’t have said that, I hope you guys will still answer my dumb questions? 😂

Happy Friday!
I've always thought it's better to look stupid than be stupid , always ask :!:
Part of knowing what you are doing is knowing when you don't know what you are doing. That's when you ask. Then you know more about what you are doing.
Hope you're doin' something fun.

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Re: Brushed motor diode/cap/???

Post by jcwrks »

Not all motors required a Schottky unless it was mentioned in your esc manual. The caps (not diodes) were typically .1 uF ceramic disc and you used two. Some esc's wanted you to use 3. Some kits had an electrolytic or tantalum cap.

Motor_Caps_RCCA 09-1994.JPG
Buds_caps.jpg
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