+c0re-

I'm looking at a cheap and basic radio set, which comprises an e-sky 6ch transmitter, negative shift futaba (72mhz), and a hitec micro electron 6 receiver, which is futaba dual shift.

I have two questions actually,

1) will these two items be compatible?

2) Do I have to buy a specific brand of crystal for this tx/rx or will any set work? I see helihobby sells e-sky tx/rx crystal sets, wondering if that will work in this rx?

Thanks for any help with this.

Rodney

I'm not sure I'm interpreting your question correctly but; in general you need to have the same manufacturers crystal in the receiver as the one who made the receiver/ i.e. use a Futaba crystal in a Futaba receiver, an Airtronics crystal in an Airtronics receiver etc. You can not legally change out the crystal in a transmitter in the USA without having it checked by an authorized service center to make sure it is withing the band limits with no spuriouse transmissions. And yes, different manufactures use different crystals as there are several different receiver designs; some may use a Hartly oscillator, some a Colpitts or some other configuration so the crystal cut and frequency determining components can vary.

+c0re-

Wow, so you're saying in the USA, I can't just swap out my Tx crystals to change my band? (as you can in Europe).

Thanks for the info, as I understand it now then, if I have an esky transmitter, and a hitec Rx, I must get a hitec Rx crystal in a matching frequency to whatever the Tx shipped with?

CrashGaalaas

My Feedback: (8)

I went to my LHS to buy a crystal for a Futaba R127DF receiver.
He sold me a Hitech crystal which he claims work just as well.

I have my own reservations about doing this so let me know what others think.

piper_chuck

My Feedback: (12)

Correct. If you want to change the Tx frequency, you need to send it to someone who can confirm it's still within specs and adjust if needed. This is not just the US, several other countries have the same requirement.
Yes, and you need to be sure that you get the correct Hitec crystal, they make several different kinds.

piper_chuck

My Feedback: (12)

Some people will sell you whatever they have even if it's not right. Return the Hitec crystal and buy the proper Futaba one from someone who knows what they are doing.

BarracudaHockey

My Feedback: (11)

Crash is your plane worth more or less than the 2 or 3 extra dollars and few days wait to get the correct crystal?

+c0re-

Thanks for the info guys, very much appreciated.