Hi CADtech,

Since we took over the Futaba Service center in 2000, we have never seen a blue stickered receiver crystal on 75mHz.

As for the regular and "short" crystals, there is no physical size difference, it is only the internal makeup of these that is different.

I would suggest that you do a range check before using this crystal. or if you are in doubt, I would purchase a completely new set.

I hope you find this information helpful. You can also reach our Futaba support technical team at 217-398-8970, or via fax at 217-398-7721.

Sincerely,
Krysta
Lead Futaba Customer Service and Programming Technician
Also you may want to check our Website at (http://www.futaba-rc.com)