22 Jul
2011
22 Jul
'11
7:47 a.m.
Congrats, Wolfgang! I love old HP gear, they were some of the best made stuff ever. I
still have an HP-67 lying around somewhere. Looks like you got a great machine!
22 Jul
22 Jul
8:07 a.m.
You're right, this seems to be a neat little machine (we can call it wife
and living room-compatible hi).
The only flaw I discovered so far is that the capstan-rubber-coating turned
into sticky goo. Will have to fix that (with some latex-hose from my
aquarium or some of these heat-shrink-hoses; eventually I can manage do
fabricate a spare-part on my lathe at work - deep frozen rubber can be
drilled etc. with a bit of luck).
The only thing this particular machine lacks is some sort of communication
to the rest of the world. I hope I can get a HP/IB, Serial or other comms
module some time....
Regards,
Wolfgang
PS: Pictures will follow.
--
Wolfgang Eichberger - OE5EWL
Operating System Collector
Blog: 5ewl.blogspot.com
Homepage: www.eichberger.org
2011/7/22 Vintage Coder <vintagecoder at aol.com>
Congrats, Wolfgang! I love old HP gear, they were some
of the best made
stuff ever. I still have an HP-67 lying around somewhere. Looks like you got
a great machine!
7:51 p.m.
The only flaw I discovered so far is that the capstan-rubber-coating turned
into sticky goo. Will have to fix that (with some latex-hose from my
Yes, this is a common problem...
You might take a loog at http://www.voidware.com/. On that site, Hugh (a
friend of mine and a fellow HPCC member) shows how he fixed his HP85
capstan using heatshrink.
aquarium or some of these heat-shrink-hoses;
eventually I can manage do
fabricate a spare-part on my lathe at work - deep frozen rubber can be
drilled etc. with a bit of luck).
I think you want to get it to about dry-ice temperature. Too cold (liquid
nitrogent, for example), and it shatters like glass.
The only thing this particular machine lacks is some sort of communication
to the rest of the world. I hope I can get a HP/IB, Serial or other comms
module some time....
HPIB and serial modules are farily common on E-bay (the others, the GPIO
(parallel), HPIL etc are harder to find). The problem is thst you need an
I/O ROM module, which fits into a 'ROM Drawer' (which then goesinto the
back of the HP85). The ROM Drawer is not too hard to find, but ROM
modules tend to be. And they are special HP custom ROM chips which
diredtly conect to the odd buss of the hP85, so you can't program an
image into an EPROM and jut plug that in. Interfacing an EPROM to an HP85
is possibly, but it's fair amount of work.
-tony
7:46 p.m.
Congrats, Wolfgang! I love old HP gear, they were some of the best
made stuff ever. I still have an HP-67 lying around somewhere. Looks
like you got a great machine!
Yes, the old HP machiens are very well designed, well made mechanically,
and generally work well even after many years. MY HP9800 series machines
are gettign on for 40 years old, and I've only had to replace 1 or 2 ICs
in each of them and do the obvious mechancial repairs (rubber rollers,
etc).
And the hP67 is a true classic calculator [1]. I still use mine a lot.
[1] The 'classic series' HP handheld calcualtors are things like the
HP35, 45, 55, 65, 70, 80. The HP67 is in a simialr case to these and some
claim it's a memebr of that family. But to me it's not. I judge a machine
by what's inside. To me the 'classic series' are those usign thr
'Arithmetic and Registers' and 'Control and Timing' ICs for the
processor, thr HP67 on the other hand uses an ACT (Arithmetic, Control
and Timing) single-chip CPU, and thus I class the Hp67 in the Woodstock
family along with the HP21, etc.
-tony
4917
days inactive
4917
days old
3 comments
3 participants
participants (3)
-
ard＠p850ug1.demon.co.uk -
oe5ewl＠gmail.com -
vintagecoder＠aol.com