Jump to content




Photo

Controller power transistor


  • Please log in to reply
12 replies to this topic

#1 ThunderThumb

ThunderThumb

    On The Lead Lap

  • Full Member
  • PipPipPipPip
  • 400 posts
  • Joined: 05-March 19
  • Gender:Male
  • Location:Orange County

Posted 02 August 2020 - 09:01 PM

Will a DiFalco Power Transistor work on any controller that uses them or are they all a little different , thanks
Earl Anderson




#2 Ramcatlarry

Ramcatlarry

    Posting Leader

  • Subscriber
  • PipPipPipPipPipPipPip
  • 2,904 posts
  • Joined: 08-March 06
  • Gender:Male
  • Location:St Charles, IL 60174

Posted 02 August 2020 - 09:28 PM

Without specific controller brand ID, the answer is a positive - maybe.   The transistor controller design has used both PNP and NPN polarity.


Larry D. Kelley, MA
retired raceway owner... Raceworld/Ramcat Raceways
racing  around Chicago-land

 

Diode/Omni repair specialist
USRA 2023 member # 2322
IRRA,/Sano/R4 veteran, Flat track racer/MFTS

Host 2006 Formula 2000 & ISRA/USA Nats
Great Lakes Slot Car Club (1/32) member
65+ year pin Racing rail/slot cars in America


#3 ThunderThumb

ThunderThumb

    On The Lead Lap

  • Full Member
  • PipPipPipPip
  • 400 posts
  • Joined: 05-March 19
  • Gender:Male
  • Location:Orange County

Posted 02 August 2020 - 10:32 PM

Everybody grinds the numbers off so how can you tell
Earl Anderson

#4 Jim Difalco

Jim Difalco

    Race Leader

  • Advertiser
  • PipPipPipPipPip
  • 606 posts
  • Joined: 20-December 08
  • Gender:Male
  • Location:Jensen Beach, Florida

Posted 03 August 2020 - 06:48 AM

Earl, what are you trying to accomplish with your question? Transistors have different amperage, wattage, polarity as well as different drive characteristics that will affect how they react.

 

Racers would occasionally throw in low amperage versions of my silver TO-3 transistors and then wonder why they would blow or overheat.

 

I currently use 2) TIP35-C transistors in my newest design, and leave the part numbers on them. The higher wattage and amperage, compared to my original silver transistor, has definitely improved my controllers reliability.


  • triggerman, Ramcatlarry, Jason Holmes and 4 others like this

Jim Difalco
Difalco Design
3075 NE Loquat Lane
Jensen Beach, FL 34957
(772) 334-1987
askjim@difalcoonline.com


#5 ThunderThumb

ThunderThumb

    On The Lead Lap

  • Full Member
  • PipPipPipPip
  • 400 posts
  • Joined: 05-March 19
  • Gender:Male
  • Location:Orange County

Posted 03 August 2020 - 11:54 AM

I had a SK smoke and the red and black wire going to the Power Transistor , so I assume the Power Transistor shorted out and since the wires are thin they took the brunt , thanks Jim
Earl Anderson

#6 JerseyJohn

JerseyJohn

    Jersey John

  • Subscriber
  • PipPipPipPipPipPipPip
  • 4,163 posts
  • Joined: 05-September 07
  • Gender:Male
  • Location:Northern NJ

Posted 03 August 2020 - 12:59 PM

I had a SK smile and the red and black wire going to the Power Transistor , so I assume the Power Transistor shorted out and since the wires are thin they took the brunt , thanks Jim

SK USES THE SAME TRANSISTOR AS dIFALCO


  • Rob Voska likes this

John Chas Molnar

"Certified Newark Wise Guy since 1984" (retired)
"Certified Tony P Chassis God 2007.2023
" Owner / Sponsor, TEAM JERSEY-TEAM AUSTRALIA 

Jerseyjohnchassis.com

 blog.jpg


#7 Jim Difalco

Jim Difalco

    Race Leader

  • Advertiser
  • PipPipPipPipPip
  • 606 posts
  • Joined: 20-December 08
  • Gender:Male
  • Location:Jensen Beach, Florida

Posted 03 August 2020 - 02:01 PM

Not sure if the SK transistor is THE SAME as mine but it does work as a replacement. Part DD830 @ $17


Jim Difalco
Difalco Design
3075 NE Loquat Lane
Jensen Beach, FL 34957
(772) 334-1987
askjim@difalcoonline.com


#8 ThunderThumb

ThunderThumb

    On The Lead Lap

  • Full Member
  • PipPipPipPip
  • 400 posts
  • Joined: 05-March 19
  • Gender:Male
  • Location:Orange County

Posted 03 August 2020 - 02:46 PM

Thanks for the info , do you think it was the Power Transistor that caused it
Earl Anderson

#9 Jim Difalco

Jim Difalco

    Race Leader

  • Advertiser
  • PipPipPipPipPip
  • 606 posts
  • Joined: 20-December 08
  • Gender:Male
  • Location:Jensen Beach, Florida

Posted 03 August 2020 - 07:43 PM

No, there most likely was a short on the track.

 

What symptoms does your controller have? Do you get any power on the wiper bands or just at full power?


Jim Difalco
Difalco Design
3075 NE Loquat Lane
Jensen Beach, FL 34957
(772) 334-1987
askjim@difalcoonline.com


#10 ThunderThumb

ThunderThumb

    On The Lead Lap

  • Full Member
  • PipPipPipPip
  • 400 posts
  • Joined: 05-March 19
  • Gender:Male
  • Location:Orange County

Posted 04 August 2020 - 01:10 PM

Dont know as it smoked and I did not want to try it again until I checked it out , after taking it apart it looks the fan wires smoked so will look again tonight , thanks
Earl Anderson

#11 Jim Difalco

Jim Difalco

    Race Leader

  • Advertiser
  • PipPipPipPipPip
  • 606 posts
  • Joined: 20-December 08
  • Gender:Male
  • Location:Jensen Beach, Florida

Posted 04 August 2020 - 01:18 PM

Whatever fusing system he has may not have worked properly which is why the wires are burned. You are going to need to replace the wiring and probably the transistor


Jim Difalco
Difalco Design
3075 NE Loquat Lane
Jensen Beach, FL 34957
(772) 334-1987
askjim@difalcoonline.com


#12 ThunderThumb

ThunderThumb

    On The Lead Lap

  • Full Member
  • PipPipPipPip
  • 400 posts
  • Joined: 05-March 19
  • Gender:Male
  • Location:Orange County

Posted 04 August 2020 - 02:28 PM

Thanks Jim for the advice
Earl Anderson

#13 JerseyJohn

JerseyJohn

    Jersey John

  • Subscriber
  • PipPipPipPipPipPipPip
  • 4,163 posts
  • Joined: 05-September 07
  • Gender:Male
  • Location:Northern NJ

Posted 05 August 2020 - 11:08 AM

Not sure if the SK transistor is THE SAME as mine but it does work as a replacement. Part DD830 @ $17

got that from the builder Jim. he said its a perfect fit


John Chas Molnar

"Certified Newark Wise Guy since 1984" (retired)
"Certified Tony P Chassis God 2007.2023
" Owner / Sponsor, TEAM JERSEY-TEAM AUSTRALIA 

Jerseyjohnchassis.com

 blog.jpg






Electric Dreams Online Shop