What, besides 21 grams in weight is the difference between the older Futaba R309DPS receiver and the newer Futaba R319DPS receiver ?? Are the specs the same for selectivity, etc. ??
Thanks....Ed M.

Anyone from Futaba going to respond ??
Thanks....Ed.

R309DPS:

FEATURES: 9-Channel PCM 1024
Dual Conversion
Narrow-Band
Selectable Frequencies between 11 and 60 in the 72 MegaHertz band

SPECS: Length: 1.43"
Width: 2.53"
Height: 0.94"
Weight: 55 grams (1.94 ounce)
Antenna: 42" length

INCLUDES: One R309DPS Receiver for J Connectors
One Plastic Screwdriver (to adjust pot dials for frequency)

COMMENTS: To select frequency just turn dials behind see-through cover.


R319DPS:

FEATURES: Perfect upgrade for the 9Z radio, but can also be used with the 9C or
9C Super
No crystal required, simply move two rotary switches to match
transmitter channel
One year limited warranty

INCLUDES: One Futaba R319DPS PCM 9 Channel Receiver with tuning screwdriver and
instruction sheet

REQUIRES: Installing in model and connecting battery and servos

SPECS: Length: 2.1" (53mm)
Width: 1.3" (33mm)
Height: 0.8" (20mm)
Weight: 1.25 oz (35.4g)
Power Requirement: 4.8V or 6V

OK, electrically what is the difference?

I long for the days where the manufactorers gave REAL Tech specs on their equipment.
I guess I'm not going to get an answer to my question concerning the R309DPS and R319DPS.
Bax, I read the commercially available size and weight specs on the 2 receivers so I knew that information already and you should have realized that by my question ( 21 grams difference ).
If you can answer my original question concerning selectivity, sensitivity, image rejection, etc. I'd be glad to see it. I've been a Futaba user for sport and competition for 16 years.