Re: The vintageTEK Museum needs your help
A commercial copying operation should be able to copy these rapidly and cheaply
Robin
toggle quoted message
Show quoted text
On 29 Mar 2018, at 13:56, Chuck Harris <cfharris@...> wrote:
Once upon a time, I scanned a $20 bill on my scanner in
full subscanned resolution, and I got a humongous file, I think
it was 10 or 20 Mb. The resolution was astonishing! I could
see the individual ink dots, and the cell structure of the
paper used to make the bill.
I think it is very possible that you could scan the individual
sheets of microfische on a good scanner. You might need to do
something to make the lighting consistent.
I have a couple of boxes of fische... I think I will give it a
whirl.
-Chuck Harris
cnc_joker wrote:
The quality of images in most microfiche that I have used is quite poor. Perhaps using
a high resolution bed scanner would be sufficient. I have an Epson V700 scanner
that has real optical 4800 DPI resolution and 9600 DPI if you use sub-sampling. There
may be even higher resolution scanners that don't cost a lot of money. There are up to
14 page images across the 4 inches width of a microfiche. My scanner would get about
150 DPI (300 DPI sub-sampled) on a single page which should be good enough to get a
usable image.
Pete.
|
Thanks David. This is very educational. What range do you classify as low
voltage?
toggle quoted message
Show quoted text
On Thu, Mar 29, 2018 at 9:38 AM, David Hess <davidwhess@...> wrote: The P6046 is a low voltage differential probe and not intended for or
really suitable orapplications where isolation is required.
Essentially it is a high voltage differential probe with the matched
high voltage input attenuators absent.
Shorting one side and using it as a single ended probe completely
defeats what isolation that it does provide; it just becomes a low
voltage active probe when used like this. The schematic from Bob
Pease that I linked shows how to make one of these. 100 MHz for an
active probe may not seem fast but these are used where input
inpedance must be as large as possible.
Where the P6046 is useful is making low voltage measurements where the
oscilloscope and DUT (device under test) share a ground but the
measurement itself either needs to remove ground noise or is a
differential signal.
On Tue, 27 Mar 2018 16:26:37 -0700, you wrote:
Thank you everybody for the feedback so far. Sorry I have not responded sooner. Just to be clear, my primary interest is in the isolation
characteristic of the differential probe as a safety precaution. I already
do a lot of things for lab safety... I have an isolation transformer and a
current limiter that I typically plug into. But, I also watched how Dave
on the EEV blog has recommended differential probes at the end of his video
() on how not to blow up your oscilloscope.
I'm not desperate for one. Between my current lab set up and my best
practices, I think I've got things pretty well covered. But, I occasionally
see the entire P6046 kit come up for sale and was wondering if it's
worthwhile for its isolation capabilities and if it's easily adapted into a
regular (CRO?) probe.
|
THS710 Repair and (future) upgrade to THS720P
Hi all, My new project is the repair of a THS710 I bought broken at a Dutch secondhand website. So far I found three problems: The screen has a 1/2" black bar at the bottom of the screen and it is quite dim. After removing the screen from the unit and opening the screen by undoing the small metal clips I found some cracks in the glass of the screen where the connections are. So I know it has to be replaced when the time comes. Since the screen is the most expensive part of the scope, I will wait ordering it until I managed to fix the other 2 problems. The second problem is the Channel-1 attenuator. When I connect a test signal to both channels, the Channel-2 does respond properly to the input sensitivity setting, but Channel-1 however, seems to skip some settings. After taking the board from the scope and removing both metal covers from the input ceramics I found the following: There are 3 relays per attenuator, the first one is the AC/DC selector, the second one is a 10x attenuator, and the third one is a 100x attenuator. These two, in combination with a change of the amplifier gain, provide the 1-2-5 etc. attenuation of the input. The relays used are the type who are Bi-Stable, double coil latch type, so they have two coils to change the position from 'Set' to "Reset', they are only energized for a short period to change the position of the relay, this to safe energy from the batteries. A datasheet can be found here: As it turned out, the second relay of Channel-1 was stuck in one position. (contacts burned together ??) I removed the relay from the ceramic (again I used a bit of QuikChip) to avoid damage to the ceramic. A test of the relay free from the scope showed that this was the case, both coils still OK (143 Ohm) , but the relay stuck in one position. I ordered these: Third problem: the battery is dead. Not so weird for NiCad cells from 1996. I found the scope only has a trickle charger circuit inside, so I found it more-or-less safe to change to NiMh replacements. I do not have the external charger. So for now I ordered the replacement relays and the battery cells. Mouser no longer stock the original brand relays, but there are several brands that make the same voltage, layout, size and contact type relays, I ordered them from the Zettler brand. but also Panasonic does make them. After I manage to fix these two problems I will order the screen. On AliExpress they are quite expensive, but on eBay the prices are more reasonable. (though not cheap!) Some pictures about the progress are here: /g/TekScopes/album?id=41029To be continued, un saludo, Leo
|
The P6046 is a low voltage differential probe and not intended for or
really suitable orapplications where isolation is required.
Essentially it is a high voltage differential probe with the matched
high voltage input attenuators absent.
Shorting one side and using it as a single ended probe completely
defeats what isolation that it does provide; it just becomes a low
voltage active probe when used like this. The schematic from Bob
Pease that I linked shows how to make one of these. 100 MHz for an
active probe may not seem fast but these are used where input
inpedance must be as large as possible.
Where the P6046 is useful is making low voltage measurements where the
oscilloscope and DUT (device under test) share a ground but the
measurement itself either needs to remove ground noise or is a
differential signal.
toggle quoted message
Show quoted text
On Tue, 27 Mar 2018 16:26:37 -0700, you wrote: Thank you everybody for the feedback so far. Sorry I have not responded sooner. Just to be clear, my primary interest is in the isolation characteristic of the differential probe as a safety precaution. I already do a lot of things for lab safety... I have an isolation transformer and a current limiter that I typically plug into. But, I also watched how Dave on the EEV blog has recommended differential probes at the end of his video () on how not to blow up your oscilloscope. I'm not desperate for one. Between my current lab set up and my best practices, I think I've got things pretty well covered. But, I occasionally see the entire P6046 kit come up for sale and was wondering if it's worthwhile for its isolation capabilities and if it's easily adapted into a regular (CRO?) probe.
|
Re: The vintageTEK Museum needs your help
On 03/29/2018 07:56 AM, Chuck Harris wrote: I think it is very possible that you could scan the individual
sheets of microfische on a good scanner. You might need to do
something to make the lighting consistent. the ones for scanning film negatives have a backlight for that purpose.
|
Re: The vintageTEK Museum needs your help
I have four cabinets full of older HP microfiche and a Canon MicroPrinter. I'd love to have those scanned. The printer is one option but it isn't working as well as it should and not sure what it will take to make it work correctly.
At least I can view them if I need to.
Thanks,
Barry - N4BUQ
toggle quoted message
Show quoted text
----- Original Message ----- From: "Leslie Austin" <Manxduke@...>
To: [email protected]
Sent: Thursday, March 29, 2018 8:16:23 AM
Subject: Re: [TekScopes] The vintageTEK Museum needs your help
I have a few hundred microfiche, Grundig and NordMende service manuals,
some Ducati parts manuals, plus a few Ford ones. I have had various full
size flatbed scanners complete with transparency adaptors, but so far
attempts at scanning fiche have been unsuccessful. I have considered
setting up a digital camera to take photos of the screen? of my fiche
reader, but not done so.
A few years ago I came across a large office size fiche scanner with
built in photocopier. I could not get service info (not surprising
really), but with a pal, we attempted repairs. We found and fixed a
number of faults, but in the end had to give up in view of no technical
info or circuits, so it went back to scrap. I think I saved lenses etc.,
but never found a use for them.
If anybody does successfully scan with a high end vanilla scanner,
please let me know. I often felt that the Canon scanners would be
suitable candidates, but their high end models had no linux drivers
available, so no chance with those.
Les.
On 29/03/18 12:37, cnc_joker wrote:
The quality of images in most microfiche that I have used is quite poor.
Perhaps using
a high resolution bed scanner would be sufficient. I have an Epson V700
scanner
that has real optical 4800 DPI resolution and 9600 DPI if you use
sub-sampling. There
may be even higher resolution scanners that don't cost a lot of money.
There are up to
14 page images across the 4 inches width of a microfiche. My scanner
would get about
150 DPI (300 DPI sub-sampled) on a single page which should be good enough
to get a
usable image.
This would get all the images on the microfiche in one scan. There would
be some
work in breaking out each page and assembling them into the proper order.
That
work could be farmed out to all of us that are interested. The Museum
could just
post the full scan of the microfiche and we would do the rest.
I may try scanning a microfiche if I can find one around here. I cleared
a lot of old manuals
out of my lab when PDF's became more convenient. My old microfiche may
have gone out as
well.
Pete.
|
Re: The vintageTEK Museum needs your help
I have a few hundred microfiche, Grundig and NordMende service manuals, some Ducati parts manuals, plus a few Ford ones. I have had various full size flatbed scanners complete with transparency adaptors, but so far attempts at scanning fiche have been unsuccessful. I have considered setting up a digital camera to take photos of the screen? of my fiche reader, but not done so.
A few years ago I came across a large office size fiche scanner with built in photocopier. I could not get service info (not surprising really), but with a pal, we attempted repairs. We found and fixed a number of faults, but in the end had to give up in view of no technical info or circuits, so it went back to scrap. I think I saved lenses etc., but never found a use for them.
If anybody does successfully scan with a high end vanilla scanner, please let me know. I often felt that the Canon scanners would be suitable candidates, but their high end models had no linux drivers available, so no chance with those.
Les.
toggle quoted message
Show quoted text
On 29/03/18 12:37, cnc_joker wrote:
The quality of images in most microfiche that I have used is quite poor. Perhaps using
a high resolution bed scanner would be sufficient. I have an Epson V700 scanner
that has real optical 4800 DPI resolution and 9600 DPI if you use sub-sampling. There
may be even higher resolution scanners that don't cost a lot of money. There are up to
14 page images across the 4 inches width of a microfiche. My scanner would get about
150 DPI (300 DPI sub-sampled) on a single page which should be good enough to get a
usable image.
This would get all the images on the microfiche in one scan. There would be some
work in breaking out each page and assembling them into the proper order. That
work could be farmed out to all of us that are interested. The Museum could just
post the full scan of the microfiche and we would do the rest.
I may try scanning a microfiche if I can find one around here. I cleared a lot of old manuals
out of my lab when PDF's became more convenient. My old microfiche may have gone out as
well.
Pete.
|
Re: The vintageTEK Museum needs your help
Once upon a time, I scanned a $20 bill on my scanner in
full subscanned resolution, and I got a humongous file, I think
it was 10 or 20 Mb. The resolution was astonishing! I could
see the individual ink dots, and the cell structure of the
paper used to make the bill.
I think it is very possible that you could scan the individual
sheets of microfische on a good scanner. You might need to do
something to make the lighting consistent.
I have a couple of boxes of fische... I think I will give it a
whirl.
-Chuck Harris
cnc_joker wrote:
toggle quoted message
Show quoted text
The quality of images in most microfiche that I have used is quite poor. Perhaps using
a high resolution bed scanner would be sufficient. I have an Epson V700 scanner
that has real optical 4800 DPI resolution and 9600 DPI if you use sub-sampling. There
may be even higher resolution scanners that don't cost a lot of money. There are up to
14 page images across the 4 inches width of a microfiche. My scanner would get about
150 DPI (300 DPI sub-sampled) on a single page which should be good enough to get a
usable image.
Pete.
|
Re: Calibration issue. 2467B (CAL 2)
If you had to change the output of your PG506 from what the
calibration routine requested, you do *not* have a valid
calibration... you have just fooled the calibration routine
into thinking it is consistent..
Is your 2467B new enough to have the SMD A5 board?
Some words on that:
The 2465 family of scopes has 4 main circuits that it uses
for all of its brilliance. The first is the A5 controller
card, which has the CPU that controls everything. The second
is the use of a couple of DAC's to allow the CPU to create
precise voltages. The third is the system of MUX's that
distribute said voltages to various parts of the circuitry,
and back. And the fourth is the Trigger hybrid that allows
the scope to sense voltages within all of the controls, and
the vertical channel.
The 2465 is worthless if the DAC cannot be set to produce
the correct voltages as referenced to a voltage divider pot,
and a set of very precise 10K SMD resistors. Similarly, if
the trigger hybrid cannot sense voltages, or if the MUX cannot
distribute said voltages throughout the scope.
My first thought is your A5 board is of the SMD type, and has
a thin coating of capacitor electrolyte all over the 10K
reference resistors, making it incapable of producing the
correct voltages necessary to make the calibration routine
work successfully.
-Chuck Harris
Craig Cramb wrote:
toggle quoted message
Show quoted text
Chuck,
Thanks again for your attention to this issue. But wanted to advise that I did get thru the cal2 process and now the 2467B is error free. I did have to make some adjustments from the PG506 to provide the correct signals thru the process. It was quite interesting how I had to use multiple values from my PG506 throughout the steps to complete. I will be following up with more info later.
Craig Cramb
On Mar 28, 2018, at 2:21 PM, Chuck Harris <cfharris@...> wrote:
There is only one way I can think of, where a scope that "has no
issues" can not be able to make the two dots go 10cm or more
apart, is you have something wrong with your signal source, or
in how you have it connected.
If you can prove that your signal source is really putting out
0.5V PP into 1M, then your scope has issues that need fixing
before it can be calibrated. It could be something as simple
as you never use your var/cal knob, and the pot needs to be
cleaned.
I have been doing 2465's for years. The calibration routines work.
There are some bugs, but not here.
If you cannot get a step to work, do not go on, hoping the scope
won't notice. It will, and you will lose any calibration constants
that you trample upon by going forward.
-Chuck Harris
|
Re: The vintageTEK Museum needs your help
The microfiche manuals seem to be very well organized in those files. It is also
likely that a lot of stuff is already available online as scans.
Here is a suggestion for identifying those films with manuals that might not be otherwise
available. Make a video of each drawer. In the video take a ruler and drag it across the tabs
so that each one is visible if only for a moment. If you post the video to YouTube
then we all could watch them to see if there is anything of interest. Slowing and stopping
the video would make them readable. Since they seem to be in order we would know
where to look.
The quality of images in most microfiche that I have used is quite poor. Perhaps using
a high resolution bed scanner would be sufficient. I have an Epson V700 scanner
that has real optical 4800 DPI resolution and 9600 DPI if you use sub-sampling. There
may be even higher resolution scanners that don't cost a lot of money. There are up to
14 page images across the 4 inches width of a microfiche. My scanner would get about
150 DPI (300 DPI sub-sampled) on a single page which should be good enough to get a
usable image.
This would get all the images on the microfiche in one scan. There would be some
work in breaking out each page and assembling them into the proper order. That
work could be farmed out to all of us that are interested. The Museum could just
post the full scan of the microfiche and we would do the rest.
All in all, getting everything of interest in those filing cabinets may not be such an
insurmountable job. The Tek Museum would scan only those microfiche that someone
has expressed an interest in. Then that person or someone else would reformat the
images into usable PDF documents and contribute them back to the museum.
I may try scanning a microfiche if I can find one around here. I cleared a lot of old manuals
out of my lab when PDF's became more convenient. My old microfiche may have gone out as
well.
Pete.
|
Re: tektronics 2465b 400mhz nvram battery info
Hi Micro,
Using Exer 02 to keep a copy of cald data is a good idea , the cal data is read from nvram location starting 1e00, so in theory can recreate, except there is probably a check sum of the data stored somewhere on the nvram, I am not sure where exactly where, there is no documentation on the checksum anywhere I have been able to find.
So if you are keen to copy the nvram, use the instructions, I previously mentioned in my post "NVRAM 2465 /2467 replacement". And you can get the data out. Desoldering the nvram to read is risky, because in these old nvram chips, the data gets corrupted easily by the desoldering process. After I had copied my nvram data out, I desoldered the nvram to replace it and found the contents in the old nvram corrupted by the desoldering.
cheers
Das
|
Re: TM 504 came today DC 504 not counting
If the totalizer runs OK you should have input pulses getting through to the counter chain.
Have you checked S160 which selects internal / external clocks? If external is selected that could explain both the frequency and period oddities.
If S160 is OK then follow the time gating signal from U160 -> U180A -> U217A etc through to U220C where the gate pulse is combined with the signal pulses.
Likely failures are 74xx logic ICs and segments of the cam switch S200.
Regards,
Roger
|
Re: The vintageTEK Museum needs your help
Sorry. I forgot that.
toggle quoted message
Show quoted text
On 2018-Mar-29 1:35 AM, Dave Casey wrote: Sounds interesting. Link?
Dave Casey
On Thu, Mar 29, 2018 at 12:08 AM, Merchison Burke via Groups.Io <
merchison@...> wrote:
This guy sells drivers for many types of scanners including obsolete
scanners at a very reasonable price. I have an UMAX Astra 1200S scanner and
his driver works great with it. Not only that but the very same software
package (there is only one) works with all listed scanners. The list is
huge.
I am not connected with Hamrick except for the fact that I am a very happy
customer. Happy that I can use my old scanner with Win7.
Merchison
On 2018-Mar-28 2:35 PM, Dave Casey wrote:
I have a microfiche machine that includes a scanning function, but it is
in
need of repair. I have had limited success getting it to scan using
generic
TWAIN drivers. Naturally, the manufacturer doesn't want to support it for
free. It might be of use to the museum, but Texas is a long way from
there.
Dave Casey
On Wed, Mar 28, 2018 at 1:28 PM, Bill Riches <bill.riches@...>
wrote:
This might be a better solution:
Alternative Micrographics
609 971-7766
Jamie Thoms
They do what you want to do!
73,
Bill WA2DVU
Cape May, NJ
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Dennis
Tillman
W7PF
Sent: Wednesday, March 28, 2018 1:46 PM
To: [email protected]
Subject: [TekScopes] The vintageTEK Museum needs your help
As many of you know Tektronix distributed entire sets of their
documentation
to their Service Centers / Field Offices on a regular basis every 3 to 6
months. This was done on microfiche.
The vintageTEK Museum has a substantial collection of this microfiche but
they currently have no way to reproduce it in digital form.
There are many invaluable documents in their collection of microfiche
that
are available nowhere else.
They are asking for your help in digitizing this microfiche.
This is a message from Dave Brown, the vintageTEK Museum President,
asking
for your help.
Dennis Tillman W7PF
TekScopes Moderator and Co-Owner
---
The vintageTEK museum has an extensive microfiche collection and has
launched a YouCaring fundraiser to help purchase a microfiche scanner to
be
able to digitize portions of the collection. Tektronix for decades
released
documentation to the field on microfiche. While some of this information
has been made public, we know specific documentation was only released on
microfiche.
Today the museum can view the information but is unable to digitize it to
be
able to support restorations, research, and customer inquiries. Please
contribute to the museum fundraiser campaign. Any amount is appreciated.
The museum operates solely by the support of volunteers, contributions,
and
modest ebay sales. The museum does not charge for tours or special
events
so your contributions are essential. vintageTEK is a 501(c)(3) charity
so
all donations are 100% tax deductible under section 170 of the IRS code.
Please see our blog at
for more
information or visit our YouCaring fundraiser site at
www.youcaring.com/Vintagetek-fiche
<>
Thank you for your support and contribution.
vintageTEK
---
This email has been checked for viruses by AVG.
|
Re: The vintageTEK Museum needs your help
Cool. I'll try out the microfiche scanner with the free trial and see if it
solves my problems.
Dave Casey
toggle quoted message
Show quoted text
On Thu, Mar 29, 2018 at 12:49 AM, TomC <tomc@...> wrote: It's Vuescan by Ed Hamrick:
Tom
On 3/28/2018 10:35 PM, Dave Casey wrote:
Sounds interesting. Link?
Dave Casey
On Thu, Mar 29, 2018 at 12:08 AM, Merchison Burke via Groups.Io <
merchison@...> wrote:
This guy sells drivers for many types of scanners including obsolete
scanners at a very reasonable price. I have an UMAX Astra 1200S scanner
and
his driver works great with it. Not only that but the very same software
package (there is only one) works with all listed scanners. The list is
huge.
I am not connected with Hamrick except for the fact that I am a very
happy
customer. Happy that I can use my old scanner with Win7.
Merchison
On 2018-Mar-28 2:35 PM, Dave Casey wrote:
I have a microfiche machine that includes a scanning function, but it is
in
need of repair. I have had limited success getting it to scan using
generic
TWAIN drivers. Naturally, the manufacturer doesn't want to support it
for
free. It might be of use to the museum, but Texas is a long way from
there.
Dave Casey
On Wed, Mar 28, 2018 at 1:28 PM, Bill Riches <bill.riches@...>
wrote:
This might be a better solution:
Alternative Micrographics
609 971-7766
Jamie Thoms
They do what you want to do!
73,
Bill WA2DVU
Cape May, NJ
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Dennis
Tillman
W7PF
Sent: Wednesday, March 28, 2018 1:46 PM
To: [email protected]
Subject: [TekScopes] The vintageTEK Museum needs your help
As many of you know Tektronix distributed entire sets of their
documentation
to their Service Centers / Field Offices on a regular basis every 3 to
6
months. This was done on microfiche.
The vintageTEK Museum has a substantial collection of this microfiche
but
they currently have no way to reproduce it in digital form.
There are many invaluable documents in their collection of microfiche
that
are available nowhere else.
They are asking for your help in digitizing this microfiche.
This is a message from Dave Brown, the vintageTEK Museum President,
asking
for your help.
Dennis Tillman W7PF
TekScopes Moderator and Co-Owner
---
The vintageTEK museum has an extensive microfiche collection and has
launched a YouCaring fundraiser to help purchase a microfiche scanner
to
be
able to digitize portions of the collection. Tektronix for decades
released
documentation to the field on microfiche. While some of this
information
has been made public, we know specific documentation was only released
on
microfiche.
Today the museum can view the information but is unable to digitize it
to
be
able to support restorations, research, and customer inquiries. Please
contribute to the museum fundraiser campaign. Any amount is
appreciated.
The museum operates solely by the support of volunteers, contributions,
and
modest ebay sales. The museum does not charge for tours or special
events
so your contributions are essential. vintageTEK is a 501(c)(3) charity
so
all donations are 100% tax deductible under section 170 of the IRS
code.
Please see our blog at
for
more
information or visit our YouCaring fundraiser site at
www.youcaring.com/Vintagetek-fiche
<>
Thank you for your support and contribution.
vintageTEK
---
This email has been checked for viruses by AVG.
|
Re: The vintageTEK Museum needs your help
Wow, I have that exact same scanner! I thought it was just dead, just haven't gotten around to gutting it yet. Do you think I should try and use it?
|
Re: The vintageTEK Museum needs your help
It's Vuescan by Ed Hamrick:
Tom
toggle quoted message
Show quoted text
On 3/28/2018 10:35 PM, Dave Casey wrote: Sounds interesting. Link?
Dave Casey
On Thu, Mar 29, 2018 at 12:08 AM, Merchison Burke via Groups.Io <
merchison@...> wrote:
This guy sells drivers for many types of scanners including obsolete
scanners at a very reasonable price. I have an UMAX Astra 1200S scanner and
his driver works great with it. Not only that but the very same software
package (there is only one) works with all listed scanners. The list is
huge.
I am not connected with Hamrick except for the fact that I am a very happy
customer. Happy that I can use my old scanner with Win7.
Merchison
On 2018-Mar-28 2:35 PM, Dave Casey wrote:
I have a microfiche machine that includes a scanning function, but it is
in
need of repair. I have had limited success getting it to scan using
generic
TWAIN drivers. Naturally, the manufacturer doesn't want to support it for
free. It might be of use to the museum, but Texas is a long way from
there.
Dave Casey
On Wed, Mar 28, 2018 at 1:28 PM, Bill Riches <bill.riches@...>
wrote:
This might be a better solution:
Alternative Micrographics
609 971-7766
Jamie Thoms
They do what you want to do!
73,
Bill WA2DVU
Cape May, NJ
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Dennis
Tillman
W7PF
Sent: Wednesday, March 28, 2018 1:46 PM
To: [email protected]
Subject: [TekScopes] The vintageTEK Museum needs your help
As many of you know Tektronix distributed entire sets of their
documentation
to their Service Centers / Field Offices on a regular basis every 3 to 6
months. This was done on microfiche.
The vintageTEK Museum has a substantial collection of this microfiche but
they currently have no way to reproduce it in digital form.
There are many invaluable documents in their collection of microfiche
that
are available nowhere else.
They are asking for your help in digitizing this microfiche.
This is a message from Dave Brown, the vintageTEK Museum President,
asking
for your help.
Dennis Tillman W7PF
TekScopes Moderator and Co-Owner
---
The vintageTEK museum has an extensive microfiche collection and has
launched a YouCaring fundraiser to help purchase a microfiche scanner to
be
able to digitize portions of the collection. Tektronix for decades
released
documentation to the field on microfiche. While some of this information
has been made public, we know specific documentation was only released on
microfiche.
Today the museum can view the information but is unable to digitize it to
be
able to support restorations, research, and customer inquiries. Please
contribute to the museum fundraiser campaign. Any amount is appreciated.
The museum operates solely by the support of volunteers, contributions,
and
modest ebay sales. The museum does not charge for tours or special
events
so your contributions are essential. vintageTEK is a 501(c)(3) charity
so
all donations are 100% tax deductible under section 170 of the IRS code.
Please see our blog at
for more
information or visit our YouCaring fundraiser site at
www.youcaring.com/Vintagetek-fiche
<>
Thank you for your support and contribution.
vintageTEK
---
This email has been checked for viruses by AVG.
|
Re: The vintageTEK Museum needs your help
Sounds interesting. Link? Dave Casey On Thu, Mar 29, 2018 at 12:08 AM, Merchison Burke via Groups.Io < merchison@...> wrote: This guy sells drivers for many types of scanners including obsolete
scanners at a very reasonable price. I have an UMAX Astra 1200S scanner and
his driver works great with it. Not only that but the very same software
package (there is only one) works with all listed scanners. The list is
huge.
I am not connected with Hamrick except for the fact that I am a very happy
customer. Happy that I can use my old scanner with Win7.
Merchison
On 2018-Mar-28 2:35 PM, Dave Casey wrote:
I have a microfiche machine that includes a scanning function, but it is
in
need of repair. I have had limited success getting it to scan using
generic
TWAIN drivers. Naturally, the manufacturer doesn't want to support it for
free. It might be of use to the museum, but Texas is a long way from
there.
Dave Casey
On Wed, Mar 28, 2018 at 1:28 PM, Bill Riches <bill.riches@...>
wrote:
This might be a better solution:
Alternative Micrographics
609 971-7766
Jamie Thoms
They do what you want to do!
73,
Bill WA2DVU
Cape May, NJ
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Dennis
Tillman
W7PF
Sent: Wednesday, March 28, 2018 1:46 PM
To: [email protected]
Subject: [TekScopes] The vintageTEK Museum needs your help
As many of you know Tektronix distributed entire sets of their
documentation
to their Service Centers / Field Offices on a regular basis every 3 to 6
months. This was done on microfiche.
The vintageTEK Museum has a substantial collection of this microfiche but
they currently have no way to reproduce it in digital form.
There are many invaluable documents in their collection of microfiche
that
are available nowhere else.
They are asking for your help in digitizing this microfiche.
This is a message from Dave Brown, the vintageTEK Museum President,
asking
for your help.
Dennis Tillman W7PF
TekScopes Moderator and Co-Owner
---
The vintageTEK museum has an extensive microfiche collection and has
launched a YouCaring fundraiser to help purchase a microfiche scanner to
be
able to digitize portions of the collection. Tektronix for decades
released
documentation to the field on microfiche. While some of this information
has been made public, we know specific documentation was only released on
microfiche.
Today the museum can view the information but is unable to digitize it to
be
able to support restorations, research, and customer inquiries. Please
contribute to the museum fundraiser campaign. Any amount is appreciated.
The museum operates solely by the support of volunteers, contributions,
and
modest ebay sales. The museum does not charge for tours or special
events
so your contributions are essential. vintageTEK is a 501(c)(3) charity
so
all donations are 100% tax deductible under section 170 of the IRS code.
Please see our blog at
for more
information or visit our YouCaring fundraiser site at
www.youcaring.com/Vintagetek-fiche
<>
Thank you for your support and contribution.
vintageTEK
---
This email has been checked for viruses by AVG.
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Re: Calibration issue. 2467B (CAL 2)
Chuck,
Thanks again for your attention to this issue. But wanted to advise that I did get thru the cal2 process and now the 2467B is error free. I did have to make some adjustments from the PG506 to provide the correct signals thru the process. It was quite interesting how I had to use multiple values from my PG506 throughout the steps to complete. I will be following up with more info later.
Craig Cramb
toggle quoted message
Show quoted text
On Mar 28, 2018, at 2:21 PM, Chuck Harris <cfharris@...> wrote:
There is only one way I can think of, where a scope that "has no
issues" can not be able to make the two dots go 10cm or more
apart, is you have something wrong with your signal source, or
in how you have it connected.
If you can prove that your signal source is really putting out
0.5V PP into 1M, then your scope has issues that need fixing
before it can be calibrated. It could be something as simple
as you never use your var/cal knob, and the pot needs to be
cleaned.
I have been doing 2465's for years. The calibration routines work.
There are some bugs, but not here.
If you cannot get a step to work, do not go on, hoping the scope
won't notice. It will, and you will lose any calibration constants
that you trample upon by going forward.
-Chuck Harris
Craig Cramb wrote:
Thank you Chuck.
I get the 2 dots with Standard amplitude selection .5v and 1KHz and can separate them by approximately 2 div. max. Adjustment of the variable knob either puts them together or 2 div apart. So say 3/4¡± apart. I am using a couple of different PG506 with the same results. I started this process because I had a 2465A model that was failing on 04-02 and couldn¡¯t get thru the Cal2 with it so decided to try the cal on the 2467B that had no issues. So now I have 2 scopes that are failing bootup. I am trying to be very careful to follow the manual as it is written.
I don¡¯t get any limit error on step 111/112. Just don¡¯t see the 10 division. Basically what I understand is close to a full trace is not happening on the first step.
It moves to step 113/114 and occasionally it moves on to 115. But from that step and onto others it¡¯s all Limits.
I will reset the Var knob back to indent before moving on to step 113/114 and see how that goes.
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Re: The vintageTEK Museum needs your help
This guy sells drivers for many types of scanners including obsolete scanners at a very reasonable price. I have an UMAX Astra 1200S scanner and his driver works great with it. Not only that but the very same software package (there is only one) works with all listed scanners. The list is huge. I am not connected with Hamrick except for the fact that I am a very happy customer. Happy that I can use my old scanner with Win7. Merchison On 2018-Mar-28 2:35 PM, Dave Casey wrote: I have a microfiche machine that includes a scanning function, but it is in
need of repair. I have had limited success getting it to scan using generic
TWAIN drivers. Naturally, the manufacturer doesn't want to support it for
free. It might be of use to the museum, but Texas is a long way from there.
Dave Casey
On Wed, Mar 28, 2018 at 1:28 PM, Bill Riches <bill.riches@...>
wrote:
This might be a better solution:
Alternative Micrographics
609 971-7766
Jamie Thoms
They do what you want to do!
73,
Bill WA2DVU
Cape May, NJ
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Dennis
Tillman
W7PF
Sent: Wednesday, March 28, 2018 1:46 PM
To: [email protected]
Subject: [TekScopes] The vintageTEK Museum needs your help
As many of you know Tektronix distributed entire sets of their
documentation
to their Service Centers / Field Offices on a regular basis every 3 to 6
months. This was done on microfiche.
The vintageTEK Museum has a substantial collection of this microfiche but
they currently have no way to reproduce it in digital form.
There are many invaluable documents in their collection of microfiche that
are available nowhere else.
They are asking for your help in digitizing this microfiche.
This is a message from Dave Brown, the vintageTEK Museum President, asking
for your help.
Dennis Tillman W7PF
TekScopes Moderator and Co-Owner
---
The vintageTEK museum has an extensive microfiche collection and has
launched a YouCaring fundraiser to help purchase a microfiche scanner to be
able to digitize portions of the collection. Tektronix for decades
released
documentation to the field on microfiche. While some of this information
has been made public, we know specific documentation was only released on
microfiche.
Today the museum can view the information but is unable to digitize it to
be
able to support restorations, research, and customer inquiries. Please
contribute to the museum fundraiser campaign. Any amount is appreciated.
The museum operates solely by the support of volunteers, contributions, and
modest ebay sales. The museum does not charge for tours or special events
so your contributions are essential. vintageTEK is a 501(c)(3) charity so
all donations are 100% tax deductible under section 170 of the IRS code.
Please see our blog at
for more
information or visit our YouCaring fundraiser site at
www.youcaring.com/Vintagetek-fiche
<>
Thank you for your support and contribution.
vintageTEK
--- This email has been checked for viruses by AVG.
|
Re: The vintageTEK Museum needs your help
One very useful doc to scan could well be the 119 page RPR dated December
01, 1997 (or later if available) which shows what parts were used where.
Tells you from the part number which instruments it was used in.
Dave
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satbeginner
David Hess
Craig Cramb
David C. Partridge