Hi guys I’m salvaging an 35mhz FM RF board from a redundant JR tx . The RF board works perfectly.
Now this will become the RF stage in a Reeduino Reed Tx.
I need to know the wiring colour code - simple I would have thought : Orange = PPM
Brown = earth and Red = +VE
HOWEVER ! before I connect it up in this fashion my multimeter suggests this is NOT correct!!! Seemingly indicating the reverse
Can somebody sort me out ?
JR RF Board ppm wiring
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- Posts: 319
- Joined: 19 Jun 2019, 04:09
Re: JR RF Board ppm wiring
How did you test with the multimeter?
Which multimeter?
What settings did you use?
One would imagine tracing the brown back to the battery negative would be sufficient.
If using a low ohm setting on the multimeter, it is possible your meter (whatever it is) might be supplying enough bias to turn on certain semi's and give you an apparent incorrect reading.
Which multimeter?
What settings did you use?
One would imagine tracing the brown back to the battery negative would be sufficient.
If using a low ohm setting on the multimeter, it is possible your meter (whatever it is) might be supplying enough bias to turn on certain semi's and give you an apparent incorrect reading.
- Wayne_H
- Posts: 812
- Joined: 17 Feb 2018, 05:26
- Location: Temora, NSW. Australia
- Contact:
Re: JR RF Board ppm wiring
Jonathan,
I found similar when I did my Ceptimus (i.e Martin) "super" s/c tx build into a Controlair Mule case. The JR RF board I used is slightly different to yours (mine is 29 Mhz FM) - you can see that I changed the wiring to more conventional colours so I wouldn't trip myself up later on I've labeled the pin connections on the board. Regardless, as Bluejets said, chase the orange wire back to the main board - it should go to ground if its the same as mine.
Good luck
I found similar when I did my Ceptimus (i.e Martin) "super" s/c tx build into a Controlair Mule case. The JR RF board I used is slightly different to yours (mine is 29 Mhz FM) - you can see that I changed the wiring to more conventional colours so I wouldn't trip myself up later on I've labeled the pin connections on the board. Regardless, as Bluejets said, chase the orange wire back to the main board - it should go to ground if its the same as mine.
Good luck
Cheers,
Wayne
Once a Retrobate, always a Retrobate............
Wayne
Once a Retrobate, always a Retrobate............
- ozrs
- Posts: 114
- Joined: 16 Feb 2018, 15:21
- Location: West Australia
Re: JR RF Board ppm wiring
on my 36mhz, from bottom of board: pos sig neg
Same as Wayne's - noting that Wayne's is installed upside down in the Mule.
Same as Wayne's - noting that Wayne's is installed upside down in the Mule.
Richard
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- Posts: 319
- Joined: 19 Jun 2019, 04:09
Re: JR RF Board ppm wiring
Seems a fairly conventional wiring numbering...attached pdf is a JR631 and shows 31 as Positive (off the switch), 32 as Signal and 33 as Ground.
Rotate the pdf and connections are half way down on the left.
I'd suggest you trace your colours back to the main board to verify, even then, I'd double check.
It not that difficult to check.
Rotate the pdf and connections are half way down on the left.
I'd suggest you trace your colours back to the main board to verify, even then, I'd double check.
It not that difficult to check.
- Attachments
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- XF631-Polarity.pdf
- (82.2 KiB) Downloaded 163 times