Ok, the answer is (for those that don't know) that the J16 has two power module options:
A mains power unit
A battery pack with a separate charger.
This is an either/or option where the chosen module is plugged in the rear and retained by four screws.? ( I replaced these with thumb screws)
The mains power module can be set for 120 or 240 operation with the aid of a soldering iron.
The battery pack contains six tabbed NiCd cells with a fuse and a 'standard' type concentric charging jack (2.5mm pin) on the rear.
I don't have an original charger but as been pointed out, it's pretty basic.
I have found that the cells are easily replaced with sub-C tabbed NiMH cells and an external NiMH charger with the correct connector can be found easily too - from the name on mine it looks to be aimed at the R/C model car racing market!
Adrian
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On 9/5/2018 4:31 AM, Artekmedia wrote:
All kinds of folks selling NiMH charger boards for $10-$15 that are small enough to wedge in somewhere
like this one 2"x2"x1"
(no affiliation just an example)
-Dc
manuals@...
n 9/4/2018 11:20 PM, Harvey White wrote:
On Tue, 04 Sep 2018 18:08:37 -0700, you wrote:
Hi Adrian,
I was interested to see your suggestion of substituting NiMH sub-C cells for the original NiCds in the J16.? Are you using the original battery charger?? According to the J16 manual the charger is simply a mains power cord, then transformer and voltage doubler rectifier with no charge control.? The J16 battery pack is simply 4 NiCds in series and a fuse, so no charging control there.
I've replaced the NiCds in my J16 twice over 20 years and they need it again.? I have always been a little disturbed about no active charging control apparently provided.??? Have your NiMH cells tolerated that charging method?
I've heard several people say that NiCd cells tolerate a larger float
current than NiMh.? Since older equipment used NiCd, the float charge
current (typically the way the cells were charged, say a 15 hour
charge at 0.1 C), was too much since the NiMh cells expected a smarter
charger that turned that charge rate off and went to a (say) 0.05C
trickle rate.
I have a 214 I may eventually do something to in terms of a smarter
charger.
Harvey
John Hunt
Portland, OR
