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Brushed motor diode/cap/???
Posted: Fri Oct 06, 2023 8:59 pm
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?
Re: Brushed motor diode/cap/???
Posted: Fri Oct 06, 2023 9:02 pm
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.
Re: Brushed motor diode/cap/???
Posted: Fri Oct 06, 2023 9:05 pm
by morrisey0
For recreations of older cars, yes, still needed ........... for looks.
For any functional purpose with modern radios, nope.
Re: Brushed motor diode/cap/???
Posted: Fri Oct 06, 2023 9:58 pm
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.
Re: Brushed motor diode/cap/???
Posted: Fri Oct 06, 2023 10:39 pm
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!
Re: Brushed motor diode/cap/???
Posted: Sat Oct 07, 2023 2:31 am
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....
Re: Brushed motor diode/cap/???
Posted: Sat Oct 07, 2023 3:51 am
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
Re: Brushed motor diode/cap/???
Posted: Sat Oct 07, 2023 9:10 am
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.
Re: Brushed motor diode/cap/???
Posted: Tue Oct 10, 2023 8:09 am
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.
