27 Jun
2004
27 Jun
'04
8:23 a.m.
I picked a HP-110 Plus (the German version, if it matters) recently, but
the power supply was nowhere to be found.
Does anybody have the pinout and voltage/current requirements?
Failing that, would it be safe to remove the battery and connect a 6VDC
power supply to the battery terminals?
27 Jun
27 Jun
9:40 a.m.
The HP Portable and Portable Plus use the same power supply that's used
for most of the HP-IL devices. It's also used for the HP-71 and 75
calculators and the rechargable battery pack for the HP-41. It will also
operate the HP-91, 92 and 97 but their ORIGINAL power supplies are slightly
different. In the US the charger is a HP 82059 but they also make different
versions to match the AC voltages and outlets in most other countries. The
output on all of them is 8 VAC. I don't remember the current but it's about
150 Ma IIRC. Look at
<http://search.ebay.com/HP-hewlett-82059_W0QQsofocusZbsQQsbrftogZ1QQfromZR10
QQcatrefZC6QQsatitleZQ28HPQ2ChewlettQ29Q20Q2082059*QQcoactionZcompareQQcopag
enumZ1QQcoentrypageZsearch> for pictures.
The batteries in the PP and PP+ are a pain. They're lead acid and they
are individual cylinders. So if you let them run down for very long, it
will ruin them and they're not an easy style to find. IIRC they're X size
which is slightly larger than standard D size.
Joe
At 04:23 AM 6/28/04 +1100, you wrote:
I picked a HP-110 Plus (the German version, if it matters) recently, but
the power supply was nowhere to be found.
Does anybody have the pinout and voltage/current requirements?
Failing that, would it be safe to remove the battery and connect a 6VDC
power supply to the battery terminals?
11:17 a.m.
New subject: Rejuvinating Lead/Acid Batterys, was Re: HP-110 Plus laptop power supply specs?
I just found out about a new type of battery charger called the
BatteryMinder that will (it is claimed) rejuvenate Lead/Acid batteries
that are dead due to sulphating. A friend of mine used one on a battery
that had been totally discharged for too long, and was able to recover
it. He sent me a 12v one and I am looking around for some batteries to
try it out ... like a couple of dozen Sharp PC-5000 lead/acid batteries
:). If this works on *old* lead acid batteries, I will be one happy
camper :)!
If anyone is curious, their web site is at:
http://www.vdcelectronics.com/batteryminder.htm
"Joe R." wrote:
The batteries in the PP and PP+ are a pain. They're lead acid and they
are individual cylinders. So if you let them run down for very long, it
will ruin them and they're not an easy style to find. IIRC they're X size
which is slightly larger than standard D size.
12:06 p.m.
New subject: Rejuvinating Lead/Acid Batterys, was Re: HP-110 Plus laptop power supply specs?
If it works, we'll ALL be happy campers! Keep me posted with your results.
Joe
At 01:17 PM 6/27/04 -0700, you wrote:
I just found out about a new type of battery charger called the
BatteryMinder that will (it is claimed) rejuvenate Lead/Acid batteries
that are dead due to sulphating. A friend of mine used one on a battery
that had been totally discharged for too long, and was able to recover
it. He sent me a 12v one and I am looking around for some batteries to
try it out ... like a couple of dozen Sharp PC-5000 lead/acid batteries
:). If this works on *old* lead acid batteries, I will be one happy
camper :)!
If anyone is curious, their web site is at:
http://www.vdcelectronics.com/batteryminder.htm
"Joe R." wrote:
The batteries in the PP and PP+ are a pain. They're lead acid and they
are individual cylinders. So if you let them run down for very long, it
will ruin them and they're not an easy style to find. IIRC they're X size
which is slightly larger than standard D size.
29 Jun
29 Jun
2:06 p.m.
New subject: Rejuvinating Lead/Acid Batterys
At 01:17 PM 6/27/04 -0700, Marvin Johnston wrote:
I just found out about a new type of battery charger
called the
BatteryMinder that will (it is claimed) rejuvenate Lead/Acid batteries
that are dead due to sulphating. A friend of mine used one on a battery
that had been totally discharged for too long, and was able to recover
it. He sent me a 12v one and I am looking around for some batteries to
try it out ... like a couple of dozen Sharp PC-5000 lead/acid batteries
:). If this works on *old* lead acid batteries, I will be one happy
camper :)!
If anyone is curious, their web site is at:
http://www.vdcelectronics.com/batteryminder.htm
It smells like a scam, ie very expensive, so I went and read the patent.
Curious stuff.
The basic idea has been around for a bit, this patent is for a
refinement/variation. Sulphate crystals resonate at 3.26 mhz, and
apparently if you "hit" them with pulses around an amp that contain enough
energy at that frequency the crystals break up and go back into solution.
Older techniques used oscillators and transformers, and apparently were not
dual function, ie they knocked off crystals, but lacked basic bulk charging
circuits.
This design has a dual function, simple bulk recharge, then the pulse mode
to keep it charged and whack the sulphates. Pulse mode is a 20 khz
apparently variable width 1 amp pulse with edges tailored to hit the magic
3.26 mhz.
Let us know how it works and don't forget to put a scope on it.
4:44 p.m.
New subject: Rejuvinating Lead/Acid Batterys
I've been reading these messages about reducing the effects of
oversulfation for the past few days and thought I'd throw in my two
cents.
While serving on nuclear submarines in the US Navy (during the 80s), I
was sent to the Navy's Battery School. A lot of time was spent
discussing sulfation, which is a normal part of discharging a battery.
Oversulfation, which is what I think is being discussed here, is
caused by under-charging the battery. Fully charging a battery after
a discharge is the best way to prevent oversulfation. The best way of
reversing oversulfation, once it has occured, is to perform an
equalizing battery charge, which is described (sort of) here:
http://www.usbr.gov/power/data/fist/fist3_6/fist3602.htm#sec2.24
The thing a lot of people don't realize is that the charge/discharge
cycle in itself wears down the plates (they form cracks due to
heating/cooling and lead or lead-oxide starts to flake off). This is
why batteries are rated for a maximum number of charges/discharges.
Trying to keep a battery going after this design life is usually a
losing battle.
27 Jun
27 Jun
11:51 a.m.
The batteries in the PP and PP+ are a pain.
They're lead acid and they
are individual cylinders. So if you let them run down for very long, it
Some Portable Plues in the UK were fitted with Panasonic 'block' lead
acid battereis which are even more of a pain!. I believe they were
available recently, but the minimum order was 1000 units or sometime
ridiculous.
will ruin them and they're not an easy style to
find. IIRC they're X size
which is slightly larger than standard D size.
The 2.5Ah Cyclon cells are easily available and fit perfectly (my 110 and
Portable Pluese have those in them now). They also can be fitted in the
9114 disk drive battery packs and at least in the UK are a lot easier to
get than the block batteries (RS components and Farnell list them I think).
-tony
11:45 a.m.
I picked a HP-110 Plus (the German version, if it matters) recently, but
the power supply was nowhere to be found.
Does anybody have the pinout and voltage/current requirements?
It's 8V AC (so there's no pinout information as such) from a 3VA
transformer of some 11 ohms internal resistance (and yes, that is
important according to the technical reference manual which I happen to
have).
Incidnetlaly, the HP adapter has a pair of inverse-series 27V zener
diodes moulded into the output socket. Not many people know they're
there [1]...
It uses the same PSU/charger as many other HP products (HP10, HP19C, HP91,
HP92, HP95C, HP97, HP97S, HP41 (with rechargeable pack), HP71B, HP75C/D,
HP82161, HP82162, HP82163, HP82164, HP82165, HP82168, HP82169, HP2225B,
HP9114A/B, etc). This is a very common and easy-to-find adapter, post an
advert on the museum of HP calculators (http://www.hpmuseum.org) and you
should get some replies.
[1] For the HP hackers here, that's also the difference between the -A
and -B adapters for the Woodstock and Spice series of calculators. The
latter, designed for machines with continuous memory, have the zeners to
remove spikes that could otherwise corrupt memory contents.
Failing that, would it be safe to remove the battery and connect a 6VDC
power supply to the battery terminals?
Should be OK, but of course you'll lose the memory contents (including
the A: ramdisk) and configuration data when you turn the PSU off.
FWIW I have both the service manual and technical manual for the 110+
(Portable Plus) and can look things up if you need me to.
-tony
28 Jun
28 Jun
3:40 a.m.
At 09:45 PM 6/27/04 +0100, you wrote:
I had it running for a while earlier today. Everything seems to be working
as it should. Nothing out of the ordinary beyond the QWERTZ keyboard and
PAM being in German. The only application installed in MS-Word, which is
English.
It's 8V AC (so there's no pinout information as
such) from a 3VA
transformer of some 11 ohms internal resistance (and yes, that is
important according to the technical reference manual which I happen to
have).
So like some HP calcs the adapter only charges the battery, it won't run
the machine with a dead/missing battery.
As I expected the battery pack is totally dead. I doubt I'll bother
replacing the battery. I've never seen these cells at any of the usual
electronics suppliers around here. I don't doubt that one of the
specialist battery companies has them, but their prices are too rich for me.
Failing that,
would it be safe to remove the battery and connect a 6VDC
power supply to the battery terminals?
Should be OK, but of course you'll lose the memory contents (including
the A: ramdisk) and configuration data when you turn the PSU off.
10:37 a.m.
At 11:40 PM 6/28/04 +1100, you wrote:
I had it running for a while earlier today. Everything seems to be working
as it should. Nothing out of the ordinary beyond the QWERTZ keyboard and
PAM being in German. The only application installed in MS-Word, which is
English.
At 09:45 PM 6/27/04 +0100, you wrote:
No, the charger will usually run the 110. Probably because the 110 uses a
lead acid battery and they tend to go open when they go bad unlike NiCads
that tend to short (and short out the PSU).
It's 8V AC (so there's no pinout
information as such) from a 3VA
transformer of some 11 ohms internal resistance (and yes, that is
important according to the technical reference manual which I happen to
have).
So like some HP calcs the adapter only charges the battery, it won't run
the machine with a dead/missing battery.
As I expected the battery pack is totally dead. I doubt I'll bother
replacing the battery. I've never seen these cells at any of the usual
electronics suppliers around here. I don't doubt that one of the
specialist battery companies has them, but their prices are too rich for me.
You can probably order the batteries from Digikey or someone like that.
My personal preference is TNR <http://www.tnrtechnical.com/default.asp>.
Joe
Failing
that, would it be safe to remove the battery and connect a 6VDC
power supply to the battery terminals?
Should be OK, but of course you'll lose the memory contents (including
the A: ramdisk) and configuration data when you turn the PSU off. 
10:21 p.m.
New subject: RX02 115VAC/60Hz -> 230VAC/50Hz
Hello list,
I have the possibility of acquiring a RX02-BA 115VAC/60Hz standard North
American power. I have a couple of questions concerning the feasibility
of a power conversion on it.
After studying the schematics of H771 of the RX01/02 units and the
manual, there are 4 things to do for a power conversion:
1. Replace H771-A with H771-C or H771-D.
2. Replace power harness
3. Replace belt and pulley
4. Replace circuit breaker
Here my questions:
1. From the schematics, the difference in H771-A and H771-C or -D is the
transformer has no center tap on the US supply. Does this mean that
there's no way for a DIY conversion job? Or it just mean that the
transformer does have a center tap and it's just unwired?
2. Power harness is no big deal, I can just make a new one.
3. Belt and pulley; this is the tough one. Calling UK list members:
anybody has spares?
4. Can the circuit breaker still be bought in electrical/electronics
supply stores?
Thanks.
/wai-sun
29 Jun
29 Jun
1:04 p.m.
New subject: RX02 115VAC/60Hz -> 230VAC/50Hz
Hello list,
I have the possibility of acquiring a RX02-BA 115VAC/60Hz standard North
American power. I have a couple of questions concerning the feasibility
of a power conversion on it.
It is _very_ non-trivial
After studying the schematics of H771 of the RX01/02 units and the
manual, there are 4 things to do for a power conversion:
1. Replace H771-A with H771-C or H771-D.
2. Replace power harness
3. Replace belt and pulley
4. Replace circuit breaker
Here my questions:
1. From the schematics, the difference in H771-A and H771-C or -D is the
transformer has no center tap on the US supply. Does this mean that
there's no way for a DIY conversion job? Or it just mean that the
transformer does have a center tap and it's just unwired?
There's rahter more to it than that. IIRC the transformer in the is PSU
is a ferroresonant type, and provides part of the voltage stabilisation.
There's an extra winding on the transformer connected to a capacitor, and
that resonates at some harmonic of the mains frequency. You can't even
run this PSU off a step down trnasformer if the mains frequency is different.
What this means is that the transformer is different between 50Hz and
60Hz models. Unlike some other PSUs, I don't think there are extra taps
on the auxilliary winding which are used to switch between mains frequencies.
The good news is that the PSU is the same on RX01s and RX02s so you might
be able to find a 50Hz one.
2. Power harness is no big deal, I can just make a new one.
3. Belt and pulley; this is the tough one. Calling UK list members:
anybody has spares?
Err, bit of metal rod (stainless steel?) and a lathe? Presumably the
motor will now run at 5/6ths the speed it would have run at in the States
and therefore you need a pulley 6/5ths the size of the one that's there.
4. Can the circuit breaker still be bought in electrical/electronics
supply stores?
If you get a 50Hz spec PSU, it will have the right breaker built in.
-tony
28 Jun
28 Jun
1:18 p.m.
At 09:45 PM 6/27/04 +0100, you wrote:
Actually, I have an idea that the 110 and Portable+ will run from the
adapter with no battery installed. I am not sure if they're supposed to
do this though.
It's 8V AC (so there's no pinout
information as such) from a 3VA
transformer of some 11 ohms internal resistance (and yes, that is
important according to the technical reference manual which I happen to
have).
So like some HP calcs the adapter only charges the battery, it won't run
the machine with a dead/missing battery.
As I expected the battery pack is totally dead. I doubt I'll bother
replacing the battery. I've never seen these cells at any of the usual
electronics suppliers around here. I don't doubt that one of the
specialist battery companies has them, but their prices are too rich for me.
Last time I bought some they were about \pounds 5.00 each for the cells.
I had it running for a while earlier today.
Everything seems to be working
as it should. Nothing out of the ordinary beyond the QWERTZ keyboard and
PAM being in German. The only application installed in MS-Word, which is
There's a configuration EPROM -- a 27C64 IIRC -- mapped in the
processor's I/O space that determines things like the keyboard layout,
machine memory size, hard reset defaults, etc. The TechRef gives the
format of said EPROM if you want to make changes, etc...
English.
You'll find 2 drawers under the machine, one each side, held in by a
couple of Torx-head screws. One is almost certainly a 'software drawer'
(holds EPORMs), there other might be a RAM drawer if you're lucky. Note
that both spaces must contain something for the machine to boot -- HP
made dummy drawers that shorted the right couple of pins on the connector
together if you didn't have the 'real' drawers.
Somewhere I have details of the format of the EPROMs for the software
drawer. It's similar to an MS-DOS filesystem. I think I even have a
program to burn your own files into EPROM to put in the drawer.
-tony
7328
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12 comments
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ard＠p850ug1.demon.co.uk -
cmcnabb＠gmail.com -
dr.ido＠bigpond.net.au -
marvin＠rain.org -
mikeford＠socal.rr.com -
rigdonj＠cfl.rr.com -
waisun.chia＠hp.com