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-   -   Tx / Rx problem ! (https://www.rctech.net/forum/ask-hitec/400101-tx-rx-problem.html)

tjolle62 05-19-2010 04:45 AM
Tx / Rx problem !
 
Hi,
as a small project for my nephew's birthday i putting a Kyosho trainer 40
together for him and found a Hitec Focus 4 without reciever and from a friend
of mine i got a HFS-04MI+ without crystal so i ordered a pair from UK with No name spec : FM35.060Mhz - UK ch66 marked T/R 27,
Something is very wrong couse when hooked them up with a pair of cheap
servos they went completly nut's :confused:
So far i know is the black lead to the right side on Rx but not sure !
So what have i done ? hooked up wrong , wrong type of X's - bad Tx - Rx ?
I would be extremly greatful for a reply in this matter,

Regards
Kjell.

A.T. 05-30-2010 02:30 AM
Originally Posted by tjolle62 (Post 7426080)
Hi, as a small project for my nephew's birthday i putting a Kyosho trainer 40 together for him and found a Hitec Focus 4 without reciever and from a friend of mine i got a HFS-04MI+ without crystal so i ordered a pair from UK with No name spec : FM35.060Mhz - UK ch66 marked T/R 27, Something is very wrong couse when hooked them up with a pair of cheap servos they went completly nut's :confused: So far i know is the black lead to the right side on Rx but not sure ! So what have i done ? hooked up wrong , wrong type of X's - bad Tx - Rx ? I would be extremly greatful for a reply in this matter, Regards Kjell.
As neither country of domcile not actual ftrequencies of the transmitter and receiver are mentioned, it is difficult to give a good answer.
1. If TX & RX are say 41 or 72 Mhz, then the 35 Mhz crystals will not be compatible.
2. If both TX & RX are labelled for the 35 Mhz band, then if the receiver crystal has a blue tip, it is dual conversion and will not operate your single conversion 5ch receiver.

sub Section "Glitches & Jitter in Receiver, Servo & ESC - causes and cures " under
"Radio Systems, Accessories, Alterations and FAQ." at:
Alan's Hobby, Model & RC FAQ Web Links may assist.

Regards
Alan T.


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