Re: An actually rare Tektronix item
Nice to say, but could you explain how you know?
-Chuck Harris
Pete Lancashire wrote:
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It is Tek
-pete ex tekkie
On Fri, Mar 30, 2018, 8:55 AM Chuck Harris <cfharris@...> wrote:
I have a bit of doubt that tektronix had anything
to do with that supply. It looks more to me like
something someone bodged together out of an old
scope.
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Re: An actually rare Tektronix item
The TU-50 was built the same way. It was a 105 Square Wave Generator, a 180 Timing Mark Generator, and a 190 Constant-Amplitude Sine Wave Generator, all crammed into one 500-series cabinet. Dave Wise ________________________________________ From: [email protected] < [email protected]> on behalf of Pete Lancashire <xyzzypdx@...> Sent: Friday, March 30, 2018 8:56 AM To: [email protected]Subject: Re: [TekScopes] An actually rare Tektronix item It is Tek -pete ex tekkie On Fri, Mar 30, 2018, 8:55 AM Chuck Harris <cfharris@...> wrote: I have a bit of doubt that tektronix had anything
to do with that supply. It looks more to me like
something someone bodged together out of an old
scope.
If you look on the front panel, which is where the
bottom of the scope it was built in would be, there
is a scar that is typical of a bottom of a scope.
The only thing that looks tektronix to me is the
knobs, case, and logo on the panel. The panel looks
to me to be hand lettered using rub on letters.
-Chuck Harris
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Re: An actually rare Tektronix item
It is Tek
-pete ex tekkie
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Show quoted text
On Fri, Mar 30, 2018, 8:55 AM Chuck Harris <cfharris@...> wrote: I have a bit of doubt that tektronix had anything
to do with that supply. It looks more to me like
something someone bodged together out of an old
scope.
If you look on the front panel, which is where the
bottom of the scope it was built in would be, there
is a scar that is typical of a bottom of a scope.
The only thing that looks tektronix to me is the
knobs, case, and logo on the panel. The panel looks
to me to be hand lettered using rub on letters.
-Chuck Harris
Michael A. Terrell wrote:
Well designed test fixtures are an asset to any company. One of my former employers cut corners on their in house fixtures, and it cost us a
lot more than proper fixtures would have. Some needed constant repairs, and
were built from samples, or obsolete inventory so there were no spare
parts. Another problem was that some employees that they could modify them
on a whim, since there were no control documents. I'm sure that somewhere
documents existed for that item at Tektronix, and it might even be in that
microfiche library at the museum.
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Re: An actually rare Tektronix item
I have a bit of doubt that tektronix had anything
to do with that supply. It looks more to me like
something someone bodged together out of an old
scope.
If you look on the front panel, which is where the
bottom of the scope it was built in would be, there
is a scar that is typical of a bottom of a scope.
The only thing that looks tektronix to me is the
knobs, case, and logo on the panel. The panel looks
to me to be hand lettered using rub on letters.
-Chuck Harris
Michael A. Terrell wrote:
toggle quoted message
Show quoted text
Well designed test fixtures are an asset to any company. One of my former employers cut corners on their in house fixtures, and it cost us a lot more than proper fixtures would have. Some needed constant repairs, and were built from samples, or obsolete inventory so there were no spare parts. Another problem was that some employees that they could modify them on a whim, since there were no control documents. I'm sure that somewhere documents existed for that item at Tektronix, and it might even be in that microfiche library at the museum.
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Re: The vintageTEK Museum needs your help
One thing I've not seen mentioned. Has anyone talked to the Computer History folks, Al Kossow <aek@...>, and/or J?rg Hoppe < j_hoppe@...>? I'm left with the impression that they've worked on this problem (alot) with the DEC Microfiche. It doesn't appear to be as simple as slapping things on a scanner and letting fly.... J?rg has a site here: that may help minimize travelling down roads already traveled. Perhaps they can at least offer advice to the project.... David On Fri, Mar 30, 2018 at 3:20 AM, Michael A. Terrell < mike.terrell@...> wrote: The last time that I checked, my local library was using microfilm on
reels, not Microfiche. Even they were confused by the name, and I was going
to donate the two Microfiche viewers that I have. Luckily, I took a look at
their machines before lugging mine in.
-----Original Message-----
From: John Griessen <john@...>
Sent: Mar 29, 2018 10:08 PM
To: [email protected]
Subject: Re: [TekScopes] The vintageTEK Museum needs your help
I think both have moved on from that era. Our Austin American Statesman
newspaper was bought out in 76 when I was studying at UT by Cox media,
related to Cox Cable, and became a generic paper with some local color.
they just print articles by the big remaining papers and the wire
services, plus a few columnists.
A few years ago the local building emptied and the paper is printed somewhere else.
No machines there. The public library is going virtual in a big way.
They rent as many as 60 copies of Blu-ray discs, then circulate 3, 2, 1
depending on popularity. They moved the main library location to a new
trendy spot by the river and probably lost a lot of heavy stuff -- that
was 6 months ago.
Other towns may be less speedy than Austin, but the end is near for
the niche market machines that transcribe from one phase of media to the
next.
Microfiche ?
MIcrofish ?
Microsquish ?
MICR checks ?
Satire ? [still a little of that left thankfully]
Michael A. Terrell
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Re: An actually rare Tektronix item
Well designed test fixtures are an asset to any company. One of my former employers cut corners on their in house fixtures, and it cost us a lot more than proper fixtures would have. Some needed constant repairs, and were built from samples, or obsolete inventory so there were no spare parts. Another problem was that some employees that they could modify them on a whim, since there were no control documents. I'm sure that somewhere documents existed for that item at Tektronix, and it might even be in that microfiche library at the museum.
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-----Original Message----- From: Richard Solomon <dickw1ksz@...>
Sent: Mar 30, 2018 10:46 AM
To: [email protected]
Subject: Re: [TekScopes] An actually rare Tektronix item
That most definitely was NOT done
by Tektronix.
Too bad, nice piece, even without
any documentation.
73, Dick, W1KSZ Michael A. Terrell
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Re: An actually rare Tektronix item
That most definitely was NOT done by Tektronix. Too bad, nice piece, even without any documentation. 73, Dick, W1KSZ On Fri, Mar 30, 2018 at 12:24 AM, Michael A. Terrell < mike.terrell@...> wrote: They did a nasty job installing that IEC power connector!
-----Original Message-----
From: "snapdiode via Groups.Io" <snapdiode@...>
Sent: Mar 30, 2018 1:04 AM
To: [email protected]
Subject: [TekScopes] An actually rare Tektronix item
POWER-SUPPLY-TUBE-AMP-BUILD-DESIGN-AMPLIFIER/282840945013?
ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649
Never seen this before. Must have been an in-house tool.
Michael A. Terrell
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Re: An actually rare Tektronix item
No business that I've worked for would allow equipment to have an opening around the power connector, for liability reasons. A metal plate would have been made, to go between the connector and the chassis. That looks to be the handiwork of someone who was too lazy to do things right.
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-----Original Message----- From: Dave Voorhis <voorhis@...>
Sent: Mar 30, 2018 6:05 AM
To: [email protected]
Subject: Re: [TekScopes] An actually rare Tektronix item
If it was formerly in regular industrial use, I imagine changing the connector so it could be powered up and used to meet some urgent deadline was of vastly greater priority than preserving either history or aesthetics.
On 30 Mar 2018, at 09:35, Adrian <Adrian@...> wrote:
Good grief! Someone must have worked really, really hard to make that much of a mess of it!
On 3/30/2018 8:24 AM, Michael A. Terrell wrote:
They did a nasty job installing that IEC power connector!
-----Original Message-----
From: "snapdiode via Groups.Io"<snapdiode@...>
Sent: Mar 30, 2018 1:04 AM
To:[email protected]
Subject: [TekScopes] An actually rare Tektronix item
Michael A. Terrell
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Hello, to excuse my English this is a translation .j have an oscilloscope
tektro on 2235 which n has not to work since a moment and he(it) does not
hold the avec track the trigger on a wave squares, would have you one ideas
or to look with the textbook(manual worker)
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Re: Back feet for 335 scope
I uploaded the photos taken from having the feet installed on Bert's 314 to the photo gallery this morning. The album name is "Tektronix 314 and 335 Replacement Feet" Jeff ________________________________ From: [email protected] < [email protected]> on behalf of toby@... <toby@...> Sent: Thursday, March 29, 2018 1:31 PM To: [email protected]Subject: Re: [TekScopes] Back feet for 335 scope On 2018-03-29 3:19 PM, Jeff Davis wrote:
Hi Bert,
I think you want to send the photos to me, not Lee (Lee was test fitting the feet on his 335). I was the one who
sent you the samples. You can send the photos to me at n0dyjeff@... or jeff@....
Thanks!
Jeff
It might be good to post pics to the gallery here, for other people contemplating ordering replacement feet? --T
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Re: An actually rare Tektronix item
If it was formerly in regular industrial use, I imagine changing the connector so it could be powered up and used to meet some urgent deadline was of vastly greater priority than preserving either history or aesthetics.
toggle quoted message
Show quoted text
On 30 Mar 2018, at 09:35, Adrian <Adrian@...> wrote:
Good grief! Someone must have worked really, really hard to make that much of a mess of it!
On 3/30/2018 8:24 AM, Michael A. Terrell wrote:
They did a nasty job installing that IEC power connector!
-----Original Message-----
From: "snapdiode via Groups.Io"<snapdiode@...>
Sent: Mar 30, 2018 1:04 AM
To:[email protected]
Subject: [TekScopes] An actually rare Tektronix item
|
Re: An actually rare Tektronix item
Booze and metal files don't mix very well. :(
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-----Original Message----- From: Adrian <Adrian@...>
Sent: Mar 30, 2018 4:35 AM
To: [email protected]
Subject: Re: [TekScopes] An actually rare Tektronix item
Good grief! Someone must have worked really, really hard to make that
much of a mess of it!
On 3/30/2018 8:24 AM, Michael A. Terrell wrote:
They did a nasty job installing that IEC power connector!
-----Original Message-----
From: "snapdiode via Groups.Io"<snapdiode@...>
Sent: Mar 30, 2018 1:04 AM
To:[email protected]
Subject: [TekScopes] An actually rare Tektronix item
Michael A. Terrell
|
Re: An actually rare Tektronix item
Good grief! Someone must have worked really, really hard to make that much of a mess of it!
toggle quoted message
Show quoted text
On 3/30/2018 8:24 AM, Michael A. Terrell wrote: They did a nasty job installing that IEC power connector!
-----Original Message-----
From: "snapdiode via Groups.Io"<snapdiode@...>
Sent: Mar 30, 2018 1:04 AM
To:[email protected]
Subject: [TekScopes] An actually rare Tektronix item
|
Re: Tek 7623A - Lowest HF Step response adjustment issue (Mid Frequency Lacking)
Fabio,
I have just checked on my 7A26 and the Low Frequency Compensation (attenuator) adjustments do have about the correct time constant to correct for your 3usec lag in response (I only checked one of the attenuator settings, 0.1V and C114,C115). You could try using the 7A26 LF compensation to flatten the 1 - 3usec region before going back to the mainframe adjustments for the higher frequency components. I am sure you can see why the standardizer plugin is useful - you have HF compensation both in the mainframe and the plugins.
I think the sharp 'knee' you have shown on the YT video is due to trying to correct the low frequency error in the plugin with the HF adjustments in the mainframe. Adjusting the lowest frequency / latest time errors first reduces the interaction between the adjustments.
I hope I am helping rather than adding confusion, best wishes,
Roger
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Re: An actually rare Tektronix item
They did a nasty job installing that IEC power connector!
toggle quoted message
Show quoted text
-----Original Message----- From: "snapdiode via Groups.Io" <snapdiode@...>
Sent: Mar 30, 2018 1:04 AM
To: [email protected]
Subject: [TekScopes] An actually rare Tektronix item
Never seen this before. Must have been an in-house tool.
Michael A. Terrell
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Re: The vintageTEK Museum needs your help
The last time that I checked, my local library was using microfilm on reels, not Microfiche. Even they were confused by the name, and I was going to donate the two Microfiche viewers that I have. Luckily, I took a look at their machines before lugging mine in.
toggle quoted message
Show quoted text
-----Original Message----- From: John Griessen <john@...>
Sent: Mar 29, 2018 10:08 PM
To: [email protected]
Subject: Re: [TekScopes] The vintageTEK Museum needs your help
I think both have moved on from that era. Our Austin American Statesman
newspaper was bought out in 76 when I was studying at UT by Cox media,
related to Cox Cable, and became a generic paper with some local color.
they just print articles by the big remaining papers and the wire
services, plus a few columnists.
A few years ago the local building emptied and the paper is printed somewhere else.
No machines there. The public library is going virtual in a big way.
They rent as many as 60 copies of Blu-ray discs, then circulate 3, 2, 1
depending on popularity. They moved the main library location to a new
trendy spot by the river and probably lost a lot of heavy stuff -- that
was 6 months ago.
Other towns may be less speedy than Austin, but the end is near for
the niche market machines that transcribe from one phase of media to the next.
Microfiche ?
MIcrofish ?
Microsquish ?
MICR checks ?
Satire ? [still a little of that left thankfully] Michael A. Terrell
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Re: An actually rare Tektronix item
Yep, the rarer it is, the quicker it gets hacked. And that's not a pun ... look at the nice job done on the AC Plug in the rear. Sometimes I wonder what people are thinking. 73, Dick, W1KSZ ps: should be interesting to see if anyone bites at that price. On Thu, Mar 29, 2018 at 10:04 PM, snapdiode via Groups.Io < snapdiode@...> wrote:
POWER-SUPPLY-TUBE-AMP-BUILD-DESIGN-AMPLIFIER/282840945013?
ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649
Never seen this before. Must have been an in-house tool.
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An actually rare Tektronix item
Never seen this before. Must have been an in-house tool.
|
Re: Back feet for 335 scope
Hi Jeff - I got the final version of the feet today & put them on my 335,
they fit and look beautiful!
I'm going to look through my collection of 2445's to see if I can find one
good foot to send you a picture of. I'm guessing they are a high breakage
rate part and likely common for the 24xx family so probably a fair demand.
They are a fairly large part though; they run vertically up the back of the
scope on either side so they are close to 6" high, 1/2" wide and 1-1/2 inch
deep. They are not solid though, there is a lot of open space. Kind of like
a tall, skinny, rectangular letter "D" with tabs at all four corners.
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On Thu, Mar 29, 2018 at 4:50 PM, Jeff Davis <n0dyjeff@...> wrote: Good thought. If Bert doesn't do that, I will when I get the photos.
________________________________
From: [email protected] <[email protected]> on behalf of
toby@... <toby@...>
Sent: Thursday, March 29, 2018 1:31 PM
To: [email protected]
Subject: Re: [TekScopes] Back feet for 335 scope
On 2018-03-29 3:19 PM, Jeff Davis wrote:
Hi Bert,
I think you want to send the photos to me, not Lee (Lee was test fitting
the feet on his 335). I was the one who
sent you the samples. You can send the photos to me at n0dyjeff@... or jeff@....
Thanks!
Jeff
It might be good to post pics to the gallery here, for other people
contemplating ordering replacement feet?
--T
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Re: The vintageTEK Museum needs your help
On 03/29/2018 07:47 PM, Brad Thompson wrote: Back in the day, two users of fiche archives were libraries and newspapers. It
might be worthwhile contacting either or both institutions in the Tek Museum area
to see whether either could provide machine time on a pro bono basis. I think both have moved on from that era. Our Austin American Statesman newspaper was bought out in 76 when I was studying at UT by Cox media, related to Cox Cable, and became a generic paper with some local color. they just print articles by the big remaining papers and the wire services, plus a few columnists. A few years ago the local building emptied and the paper is printed somewhere else. No machines there. The public library is going virtual in a big way. They rent as many as 60 copies of Blu-ray discs, then circulate 3, 2, 1 depending on popularity. They moved the main library location to a new trendy spot by the river and probably lost a lot of heavy stuff -- that was 6 months ago. Other towns may be less speedy than Austin, but the end is near for the niche market machines that transcribe from one phase of media to the next. Microfiche ? MIcrofish ? Microsquish ? MICR checks ? Satire ? [still a little of that left thankfully]
|
Michael A. Terrell
Lee Houde