| Are there any crystal controlled receivers designed to take any
| crystal between 72 Mhz and 75 Mhz?
Why are you worried about 72 MHz at all?
| I have a VEX Robotic 6 channel transmitter on channel 89 and I want to
| receive the PWM signals on a non-VEX receiver.
You should be able to use car RXs. I don't know if the VEX TX is
positive or negative shift, however. Do the shifts for car RXs match
the shifts for plane RXs? Futaba, Hitec = negative, JR, Airtronics positive?
Cars use a lot more AM gear, so you'll probably need to make sure you
get a FM RX. At least I assume the VEX TX is FM.
In any event, if you really do want a RX that can do 72 MHz and 75
MHz, the seven channel Sombra labs SHadow 3 fits the bill -- and I
suspect it's the only thing available that does.
it doesn't take crystals at all, but can use any of the R/C channels
in the 72 MHz or 75 MHz bands. It also can deal with both positive
and negative shift.
Personally, I've got two of them and I'm unimpressed with them -- they
seem to get into trouble very easily and stop responding to what I'm
telling them, in situations where other RXs work fine. But for land
use (where you don't go too far away) they might be great -- but there
are other synthesized (no crystal) RXs for car use available too.
Doug McLaren, firstname.lastname@example.org
"Give me ambiguity, or give me something else!"
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