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[Davenotdone]

Hi!  I have an old Acoms 2 channel transmiitter ( model AP - 201 ) which works fine. I am using 8 x rechargable  2900mah AA type batteries in and of course have to keep taking them in and out every time to recharge. I notice there is a charging jack in it but i don't know if the centre pin is + or minus. I have a brand new Fusion Vector AC/DC charger with connectors for either + or - centre pin. So my question is what polarity is the centre pin and what rate should i charge at, ie  0.5,   1,   2,   3.5  or  5. Allso do you have trhe transmitter switched on while charging or off. Regards, Dave.

[andrewh]

Dave,

Here goes with the beginnings of answers to your questions

Hi!  I have an old Acoms 2 channel transmiitter ( model AP - 201 ) which works fine. I am using 8 x rechargable  2900mah AA type batteries in and of course have to keep taking them in and out every time to recharge. I notice there is a charging jack in it but i don't know if the centre pin is + or minus.

Centre pin is traditionally positive, and it would be possible to check this on the transmitter, but I believe that all Japanese transmitters fit a diode which prevents easy checking of connections from the outside.
I have a brand new Fusion Vector AC/DC charger with connectors for either + or - centre pin. So my question is what polarity is the centre pin and what rate should i charge at, ie  0.5,   1,   2,   3.5  or  5. Allso do you have trhe transmitter switched on while charging or off. Regards, Dave.

Charge at c/10 for slow charging, for about 14 hours , definitely with the transmitter switched off.  The nearest you have is 1/2 amp and this should take about 6 hours FROM FLAT

To check the polarity of the charge plug EITHER
Wait for a Mayhem expert to give the exact answer or
Take the back off your Tx and check the connections to the batteries

Hope this helps
andrew
PS I have an Acoms upstairs - I will have a look next time I pass




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[malcolmfrary]

Looking at the little label on the bottom of mine, just by the charge jack, the diagram says that the centre pin is positive.

[Davenotdone]

Thanks for your help guys, i actually found the jack diagram inside the transmitter ( where the batteries go ) and not on the outside of the casing. Yes you were both right, the centre pin is the +   .Once again, many thanks, regards, Dave.