Hitec and Futaba Crystal Overtone???

[rcelectric_br]

Somebody please would know to inform in which overtone to me if it finds crystals of the radios equipaments of the Hitec and the Futaba?

[electrotor]

Somebody please would know to inform in which overtone to me if it finds crystals of the radios equipaments of the Hitec and the Futaba?

First of all it would help if you give your location or country. There is an option to do this in your profile.
Secondly, both Hitec and Futaba supply crystals for all the legally available radio control frequencies where their gear is sold. USA 72MHz band, UK 35MHz band, etc.

You can find the individual spot frequencies (channels) within each band using the following link : http://www.ukrcc.org/internat.html

[hackken]

I have had some experience with Futaba AM receivers. The ones that I am familiar with used a 3rd overtone crystal. I don't know what overtone the Hitec reciever crystals used. If the number stamped on the crystal that is presently in the reciever is 1/2 the operating frequency +or - .455, then it is a 3rd overtone crystal that is required. If the number stamped on the crystal is the operating frequency + or - .455, then it is a 5th overtone crystal that is required. Hope you do not find this too confusing and this is the information you are looking for.

[A.T.]

Hitec DC RX crystals on 35.36 & 40MHz have a frequency 10.7MHz ABOVE the
nominal frequency whereas Futaba DC RX crystals are 10.7MHz BELOW nominal
frequency. Hitec FM TX xtals are cut at half nominal frequency whereas the
Futaba FM TX xtals are cut at 1/3 nominal frequency. see further details
under the URL's at Alan's Hobby Web Links
http://homepages.ihug.co.nz/~atong/ Sub section "Crystals, Oscillators & Piezo"
regards
Alan T.

Alan's Hobby, Model & RC Web Links
http://homepages.ihug.co.nz/~atong/