JR radio internal battery

For what it's worth: I had two of the JR 10 first model transmitters...at least fifteen years old. A "friend" replaced both batteries in them. He bridged the lands where the unit was soldered in so it would not lose anything. He complained that the original battery had welded solder tabs to facilitate installation. The replacement batteries he got were the exact same ones (Radio Shack) and he soldered wires to them and installed them. Worked fine. A few years later, I sent them both in to JR for other service and they replaced the batteries he put in there and noted that it had been a poorly done job. I never told him as I didn't want to hurt his feelings... I still have one of the 10 transmitters and sold the other to a member of our R/C club. Both are working just fine.... Frank Schwartz

Not for a Tech class Ham License currently. Ya do need a license tho. After the first, the code requirements will be dropped for all classes. Time to upgrade to a General Class, I think!

Believe it or not, the FCC just did away with the code test for ham radio licensing.

Ed Cregger

Ah-ha, another Whitworth accolyte.

Ed Cregger

And it's about time...

Yeah, it turned into more expensive CB a long time ago.

Ed Cregger

Greetings

My service notes from the last one I replaced a battery in (using jumpers and soldered on leads so I did not lose the settings) I used a BR-1632 Panasonic lithium cell.

Yes the cell is under the lower circut board.

One source is DigiKey

but they have a $25 mimium order but ship as late as 7 PM central time.

Hugh

ahdofu wrote:

Luckey you!

Since JR will not release any details of modifications you are taking a chance here that they different versions or you were just very lucky.

At least they are made by Lucas, the darksun company.

Hugh former owner of a late 1950's era MG ZA in my college days.

That one is the correct cell but is not the correct case.

If you are careful and can get it in place without interfering with the mechanics it will work.

The exact cell is one with two welded leads bent so the cell lays flat when soldered to the PCB.

Our supplier, DigiKey, calls it a P203ND Panasonic part number BR1632A/HA Is a 3 volt 120 MAH cell, standard design drain is 0.03 MA.

16 mm diameter and 3.2 mm high cell / 8.8 mm height with pins.

I really have no experience with soldering pins to the battery. It is really small and I think there is a considerable risk to do heat damage or shorten cell life by overheating it.

Our policy on electronic repairs is to only use the original part configuration for all repairs unless their is a recognized or necessary upgrade to return the item to service.

Reduces our liability exposure.

Hugh

ahdofu wrote:

Nah, he got the Lucas Prince of Darkness version.

>

My X347 transmitter wad dead, no beep and no display when powering .

First I measured voltage on BU bat , only some mV. I soldered a 1.5 V battery, using wires to the BU points, fusing th positive solder bridge. Then I removed the dead BU Bat. I removed from it the two stainless steel flags and resoldered to th new battery, a watch 2032 bat, put in on location, soldered an simultaeously rebuilt the bridge and removed the 1.5V battery. Then I switched on power, and rebooted as Ron explained me ( onl shortcut between 2 points) : long beep, I switched off. I switched on, magic, all program was there, and no need to recal . I checked it on many program steps and all I checked is good, servo neutrals and ranges, dual rates and mixes. I will fly one of these good first spring days. May be I' ve been lucky. Andr

-- frenchomebuilde

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Good job. mk

Which two points do you have to short in the X-347 in order to get it to reboot? TIA

Ed Cregger

Look the board on wich is located the BU bat. Under the piece o

plastic, is written "R" on a large vertical track. Close on the right

2 pads to be shorten. The back part of the radio must be connected Switch on power , short the points just a time, and life is at ne going on . Excuse my poor english. Andr

-- frenchomebuilde

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Thanks, Andre. I'll get the old X347 going again, thanks to you.

Your English is infinitely better than my French. Take care.

Ed Cregger

Please let me know, so I will understand if I' ve been lucky or no

... Have a good day Andr

-- frenchomebuilde

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