30 Mar
2004
30 Mar
'04
11:14 a.m.
Hello all,
I have a question or 2 to ask on the HP9826. I am now the proud owner of
the labs old system.
Now I have several issues to resolve. The first is the reason I have and
the lab does not. The
display is out of focus and not too bright. I have tried to adjust using
the pots inside labeled focus
brightness. It helped alittle but not much. Any ideas?
Also its no fun without an OS. Now we have BASIC Ver 5.12 at the
lab. Unfortunately its on
3 1/2 inch diskettes and the HP9826 has a 5 1/4 diskette drive. Hence
short of using a mallet
that won't help. So is there a method of using a PC to make 5 1/4s for it
since I do have the
3 1/2s?
Thanks
Max
30 Mar
30 Mar
9:53 p.m.
At 08:14 PM 3/30/04 -0500, you wrote:
Hello all,
I have a question or 2 to ask on the HP9826. I am now the proud owner of
the labs old system.
Now I have several issues to resolve. The first is the reason I have and
the lab does not. The
display is out of focus and not too bright. I have tried to adjust using
the pots inside labeled focus
brightness. It helped alittle but not much. Any ideas?
Also its no fun without an OS. Now we have BASIC Ver 5.12 at the
lab. Unfortunately its on
3 1/2 inch diskettes and the HP9826 has a 5 1/4 diskette drive. Hence
short of using a mallet
that won't help. So is there a method of using a PC to make 5 1/4s for it
since I do have the
3 1/2s?
It's POSSIBLE to transfer data that way but it probably won't work in
this case since the 3 1/2" hold a lot more data and the 5 1/4" needs to be
bootable. Can you borrow your labs 3 1/2" drive or borrow one from someone
else? Are your 3 1/2"s single or double sided? Where are you located?
Joe
Thanks
Max
31 Mar
31 Mar
9:25 a.m.
On Wed, 31 Mar 2004 06:53:34 -0500
"Joe R." <rigdonj(a)cfl.rr.com> wrote:
At 08:14 PM 3/30/04 -0500, you wrote:
A number of years ago I successfully 'shoehorned' in a 3-1/2" floppy
drive on an Intel PDS system. The Intel box only had 5-1/4" 'quad density'
80-track drives, for which media was difficult and expensive to obtain. The trick I used
was to plug in a 720K 3-1/2" drive as the second drive on the floppy cable. The
system thought of it as being the same drive as a 5-1/4" 720K (quad density) drive
and let me perform 'disk copy' routines from 5-1/4" to 3-1/2" media.
Then I installed the 3-1/2" drive in the box and used it as the primary boot drive
for ISIS. It worked really well, considering I only had the few Original Intel diskettes
to convert in this fashion.
Nowadays, of course, 3-1/2" 720K diskettes are almost as hard to obtain in any
quantity as 5-1/4" 720K diskettes were back then.
This might not work for what's being discussed here, but it worked really well for me
at the time and is a method that should also be considered. 'Just plug it in and
try' is sometimes worth attempting.
-Scott
Hello all,
I have a question or 2 to ask on the HP9826. I am now the proud owner of
the labs old system.
Now I have several issues to resolve. The first is the reason I have and
the lab does not. The
display is out of focus and not too bright. I have tried to adjust using
the pots inside labeled focus
brightness. It helped alittle but not much. Any ideas?
Also its no fun without an OS. Now we have BASIC Ver 5.12 at the
lab. Unfortunately its on
3 1/2 inch diskettes and the HP9826 has a 5 1/4 diskette drive. Hence
short of using a mallet
that won't help. So is there a method of using a PC to make 5 1/4s for it
since I do have the
3 1/2s?
It's POSSIBLE to transfer data that way but it probably won't work in
this case since the 3 1/2" hold a lot more data and the 5 1/4" needs to be
bootable. Can you borrow your labs 3 1/2" drive or borrow one from someone
else? Are your 3 1/2"s single or double sided? Where are you located?
2 Apr
2 Apr
9:32 a.m.
I have a question or 2 to ask on the HP9826. I am now
the proud owner of
I don't have a 9826 (it's one of the few HP desktops I've not obtained
[1]) but the video circuitry is likely to be conventional.
[1] 2 off 9100B, 2 off 9810, 9830, 9815, 9825, 9831, 9845, 9836, 3 off
85, 3 off 86B, 87, 87XM, 9915, 150-II, IPC, etc...
the labs old system.
Now I have several issues to resolve. The first is the reason I have and
the lab does not. The
display is out of focus and not too bright. I have tried to adjust using
the pots inside labeled focus
brightness. It helped alittle but not much. Any ideas?
In general, problems are never solved by tweaking adjustments. The only
reason to twiddle presets is to see what, if any, effect they have on the
symptoms. If, for example, the focus pot had no effect at all, you might
start by suspecting the focus anode voltage was missing for some reason.
Anyway, dim and out of focus sounds like a CRT electrode voltage problem.
Alas you didn't measure the voltages when the machine was working
correctly (something I normally do do), so you've got nothing to compare
against. But I'd start looking around the line output stage (horizontal
output stage), possibly for a bad capacitor or a flyback transformer problem.
-tony
7338
days inactive
7341
days old
3 comments
4 participants
participants (4)
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ard＠p850ug1.demon.co.uk -
keith＠saracom.com -
rigdonj＠cfl.rr.com -
sastevens＠earthlink.net