Radio Control Forward/Reversing
Speed Control

• ROBOT ARMS, HEAD CONTROL

• PROFESSIONAL VERSION OF RET FAMILY

• METAL CASED
  R/C  CONTROLERS

• MOSFET FULL H-Bridge OUTPUTS
  NO RELAYS TO STICK

• 5-24 VDC OPERATION

• OPTICALLY ISOLATED

• TRIED & TRUE DESIGN with
  IMPROVED VOLTAGE RATINGS

This series of speed controllers is based upon the RET family, a proven design re-packaged into an aluminum case for durability.   They control DC Permanent Magnet motors in Radio/Control robots and model boats, subs.  All of these units are fully proportional in reverse as well as forward from one R/C channel.

Power MOSFET technology combines with moderate rate Pulse Width Modulation so you get smooth low speed operation, precise intermediate speeds and efficient full speed without the annoying "singing".  The solid state H-bridge design uses no relays, extra modules, nor are special heat sinks required. Unlike most hobby controllers with exposed transistors that can short out, these VANTEC units are fully enclosed in a metal case and the critical MOSFETs that conduct your motor current are properly thermally mounted to the metal heat conducting chassis. The case is electrically neutral.

The RFR family is a ideal replacement for hot rheostats or inferior units with sticky relays. With both proportional reverse and proportional forward it is perfect for professional R/C robots or model scale boats.  See the sidebar on Ampere ratings at ameramps.htm.  Please call with your amperage requirments to determine the appropriate model for your amplication.

RFR
model
number

CONTINUOUS
AMPS tested
@ 12VDC

Start-
ing
Surge
for
5 seconds

MOS
FET
total
cumu-
lative
rat-ings

RFR821

12A

30A

155A

RFR822

50A

310A

RFR823

33A

75A

480A

RFR825

110A

850A

COOLING: Because the case is electrically isolated you should mount the flat side of the chassis adjacent to the four MOSFET mounting screws to your metal shelf, tank mechanics or robot frame when required or when operated at their maximum ratings. Measure your motor current under load with an inexpensive automobile amp meter.

EASY TO USE:These controllers come with complete instructions and the single centering adjustment comes factory preset for your radio but can be readjusted. No awkward rate adjustment required. There are two wires for the motor battery and two wires to the motor. Plug it into your radio and you are ready to go!

NOTES:  The RFR has a limited one-year warranty based upon a nominal repair charge for units not tampered with or abused. Details available on our Warranty page. A single Electronic Throttle may control several motors together if total current and voltage ratings are not exceeded; consider series as well as parallel motor connection. Dual motor systems with mechanically coupled shafts must be wired in series. Paralleling Electronic Throttle servo inputs or use with mixers for differential twin screw or tank type steering is not recommended; use our RDFR series speed controls made for that purpose. Contact VANTEC about professional control systems for commercial applications.