Dave
The LM317 is the old standby of adjustable 3 terminal voltage regulators.
The standard unit is only good for 1.5 amps but I'm pretty sure there is a 3
amp version. Would require a small box or other aluminum heat sink. I'm sure
your tech buddies can handle that if no other choice.

Tom WA6IVG

On Tue, Sep 29, 2015 at 05:04:24PM +1300, Dave Allen wrote:
> Hi Tom!
> 
> Thanks for the info. My building has been minimal, but do have good help in
> the area with a couple very helpful folks. I do recall reading about the
> LM317 though it's been several years. 
> 
> We were talking about similar adaptatios this morning, so will keep it all
> in mind to see what my tech buddy reports by tomorrow. I was surprised to
> find that 10 VDC specified on there, but the thing did come from the UK
> originally, so it ain't the first thing they';ve tried to do different, hi
> hi.
> 
> 73,
> Dave
> 
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Tom Fowle
> Sent: Tuesday, 29 September 2015 4:58 p.m.
> To: [log in to unmask]
> Subject: Re: OT in search of a PTR 2 charger
> 
> Dave,
> If all else fails one could adapt a 15 volt wall wart by adding an
> adjustable voltage regulator and a few parts. Don't think I've ever seen 10V
> chargers.  I believe there are 3 amp versions of the good old LM317
> adjustable regulator. Ever done any building?? or have any local friends who
> have?
> 
> Last desperate hope.
> 
> Tom Fowle WA6IVG
> 
> On Mon, Sep 28, 2015 at 07:10:55PM +1300, Dave Allen wrote:
> > Hi all!
> > 
> > Anyone familiar with the (apparently now obsolete) Plextalk PTR 2 player?
> > 
> > I can usually adapt a standard charger to satisfy most of the portable 
> > players around, but this one is a bit unique. Some requirements are 10 
> > VDC at 2A.
> > 
> > Folks keep sending me around in circles. Manufcturer claims to have a 
> > partner here that can supply it, but contacting the recommended 
> > partner gets me no where because they assert (reasonably I think) that 
> > they've never stocked the player so they couldn't offer a charger.
> > 
> > Anyone got ideas on this?
> > 
> > 73,
> > Dave
> > 
> > David Allen, Director
> > Blind-Sight Limited
> > For computer training and support world-wide, equipment or braille 
> > production please contact me through any of the following ways:
> > Email: [log in to unmask]
> > Telephone: 64-3-455-7694 (Home)
> > 64-27-224-5489 (Mobile)
> > PO Box 9046
> > St Clair
> > Dunedin 9047
> > NEW ZEALAND