General Receiver
The following questions are common questions regarding Receivers.A. A single conversion receivers have only one "mixer" stage. The receiver takes the incoming signal and mixes it with the local oscillator signal. The different frequency is then amplified as the Intermediate Frequency (IF) and detected for use. The draw back with single conversion is that there is a chance of "image" reception. This is where, depending on the receiver tuning, the receiver will pick up an image of another frequency at either the high or low end of the band.
A dual conversion receiver has two mixer stages and two local oscilators. This eliminates the chances of image reception. Dual conversion also allows for better interference rejection.
A dual conversion receiver has two mixer stages and two local oscilators. This eliminates the chances of image reception. Dual conversion also allows for better interference rejection.
A. After a crash or hard landing, the ceramic filter can become damaged. This is the most common cause. To prevent this, Hitec suggests using the supplied Flight Preserver and mounting the receiver away from the fire wall of the plane.
If your receiver is vibration sensitive, send it in to the service department for repair.
If your receiver is vibration sensitive, send it in to the service department for repair.
A. Hitec receivers are center aligned so you can change the frequency easily. When changing the frequency, be sure that you change it with the same type of crystal (dual or single conversion) and that it is in the same band (27, 72 or 75MHz). Use only Hitec crystals.
A. Antenna length depends on the frequency band. Below are the common bands and the length associated with each: 27MHz - 22 inches
72MHz - 42 inches
75MHz - 22 inches
A. You can plug the battery into any open channel.
A. The positive or negative shift mentioned pertains to FM receivers. The shift is the way the FM signal is modulated. For Hitec and Futaba the shift is negative. Airtronics and JR are positive shift. Because the modulated signal is different, you cannot use a negative shift transmitter with a positive shift receiver or visa versa.
A. BEC stands for Battery Eliminator Circuit. What this circuit does is take a 7.2 to 8.4V battery pack and reduce the voltage to 5V. This allows the receiver to operate properly. This circuit is mostly used in conjunction with a mechanical speed control.
A. The crystal required depends on the receiver. Please refer to the table below. Hitec organizes receiver crystals according to pull tab color and part number.
Note: XX = Channel Number
Note: XX = Channel Number
| Part Number | Frequency Band | Designator | Color Code | Single or Dual Conversion | Receivers |
| 66727XX | 27 FM | RF | Blue | Dual | -DCX |
| 66772XX | 72 FM / AM | RF | Blue | Dual | -Supreme |
| 66775XX | 75 FM | RF | Blue | Dual | -DCX |
| 66427XX | 27 AM / FM | RA | Green | Single | -HAS03MB -HP2RNB -HFS03MM -HIS03MK |
| 66472XX | 72 FM / AM | RA | Green | Single | -Feather -HAS03MB -HFS04MG |
| 66475XX | 75 AM | RA | Green | Single | -HAS02MB -HP2RNB |
| 66875XX | 75 AM | RS | Red | Single | -HFS03MM -HFS03MK |