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Re: O.T. Digital scopes versus Tek analogue.
Thanks, I can't keep up with it. Ugh. It's really painful to see the remains of once-great companies be drones in a corporate army. =[
Sean
Thanks, I can't keep up with it. Ugh. It's really painful to see the remains of once-great companies be drones in a corporate army. =[
Sean
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By
Sean Turner
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#179856
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Re: O.T. Digital scopes versus Tek analogue.
Fortive ows them all now.
Regards
Hardy
-----Oprindelig meddelelse-----
Fra: TekScopes@groups.io [mailto:TekScopes@groups.io] På vegne af Sean Turner
Sendt: 5. marts 2021 07:56
Til:
Fortive ows them all now.
Regards
Hardy
-----Oprindelig meddelelse-----
Fra: TekScopes@groups.io [mailto:TekScopes@groups.io] På vegne af Sean Turner
Sendt: 5. marts 2021 07:56
Til:
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By
hardyhansendk
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#179855
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Re: O.T. Digital scopes versus Tek analogue.
Jeff,
An instrument called a "source measure unit" is what is typically sold these days as an instrument for curve tracing (and other purposes). Keithley (which is a Tektronix/Danaher subsidiary now)
Jeff,
An instrument called a "source measure unit" is what is typically sold these days as an instrument for curve tracing (and other purposes). Keithley (which is a Tektronix/Danaher subsidiary now)
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By
Sean Turner
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#179854
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Re: 547 HV Transformer: Bill Schell rewind failed
Hi Dave-
I'm sorry to hear that you're having trouble with that HV XFMR....
I did a lot of testing and evaluation for Bill Schell over the years and I don't remember him every testing a transformer
Hi Dave-
I'm sorry to hear that you're having trouble with that HV XFMR....
I did a lot of testing and evaluation for Bill Schell over the years and I don't remember him every testing a transformer
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By
fiftythreebuick
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#179853
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7854 Source Code for version 1.02, 1982 release now on Kurt's TekWiki
Kurt Rosenfeld has posted the entire line printer listing (454 pages) of the 1982 source code version 1.02 for the 7854. It's an early release but it reveals some interesting things.
Kurt Rosenfeld has posted the entire line printer listing (454 pages) of the 1982 source code version 1.02 for the 7854. It's an early release but it reveals some interesting things.
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By
Clark Foley
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#179852
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Re: 2235 AN/USM-488 power supply low voltages
All the voltages are about 86-88% of their target value. Especially -8.6V is the reference for all other supplies so if it is off by some percentage all others will be off by about the same
All the voltages are about 86-88% of their target value. Especially -8.6V is the reference for all other supplies so if it is off by some percentage all others will be off by about the same
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By
Ozan
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#179851
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Re: 547 HV Transformer: Bill Schell rewind failed
Chuck,
Are you in need of bees wax? I might be able to get some in bulk. I happen
to know a couple of bee keepers. I would also like to learn more about the
transformer winder when the time is
Chuck,
Are you in need of bees wax? I might be able to get some in bulk. I happen
to know a couple of bee keepers. I would also like to learn more about the
transformer winder when the time is
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By
Eric
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#179850
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2235 AN/USM-488 power supply low voltages
I bought this scope earlier this summer as new old stock, never powered on. Due to covid illness I never opened it until a week ago. The scope powered on ,but the trace only covered about 2/3s of
I bought this scope earlier this summer as new old stock, never powered on. Due to covid illness I never opened it until a week ago. The scope powered on ,but the trace only covered about 2/3s of
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By
richardallred@...
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#179849
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Re: Replacing Variable Vertical Attenuator Shaft
Dick,
I parted out some 7000-series plug-ins that were not repairable. I believe
I have some of those G-10 rods. They connect to pots via a coupler with two
set screws. If that rod is what you need,
Dick,
I parted out some 7000-series plug-ins that were not repairable. I believe
I have some of those G-10 rods. They connect to pots via a coupler with two
set screws. If that rod is what you need,
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By
stevenhorii
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#179848
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Re: Replacing Variable Vertical Attenuator Shaft
The shaft is a piece of G-10 rod that's about 7" long. It goes
from the Front panel to a bushing buried in the Vertical Amplifier.
I thought I would ask before I butcher the job.
I am located in
The shaft is a piece of G-10 rod that's about 7" long. It goes
from the Front panel to a bushing buried in the Vertical Amplifier.
I thought I would ask before I butcher the job.
I am located in
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By
Dick
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#179847
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Tek 492BP how to save via GPIB to a PC
I have an 492BP, and a GPIB to USB National Instruments. Can I use the HP 7470A plotter program to save screens?
I tried and I get error borad GPIB0 not found.
I have an 492BP, and a GPIB to USB National Instruments. Can I use the HP 7470A plotter program to save screens?
I tried and I get error borad GPIB0 not found.
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By
Mike Yepes
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#179846
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Re: 547 HV Transformer: Bill Schell rewind failed
Hi Bernd,
All indications are that my new machine is going to
do an even better job than the best I could do with
the old manual machine.
As an example, I was able to get 2/3 of the way to a
full
Hi Bernd,
All indications are that my new machine is going to
do an even better job than the best I could do with
the old manual machine.
As an example, I was able to get 2/3 of the way to a
full
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By
Chuck Harris
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#179845
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Re: Replacing Variable Vertical Attenuator Shaft
I bet that is an AB mod pot, in which case you can repair the pot with a new shaft part. What is the length of the shaft?
oh, and what part of the world are you located in.
Cheers
Alan
I bet that is an AB mod pot, in which case you can repair the pot with a new shaft part. What is the length of the shaft?
oh, and what part of the world are you located in.
Cheers
Alan
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By
Waltzingbear
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#179844
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Tektronix 2205-40 SGL SWP not working
Hello group. I have a 2205-40 that I use to repair tube amplifiers and other simple audio stuff. Everything works perfectly on the scope except for the SGL SWP trigger. I haven't yet opened up the
Hello group. I have a 2205-40 that I use to repair tube amplifiers and other simple audio stuff. Everything works perfectly on the scope except for the SGL SWP trigger. I haven't yet opened up the
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By
Jay Czaja
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#179843
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Re: 547 HV Transformer: Bill Schell rewind failed
My memory certainly hasn't improved with age.Not much else seems to have, either...But, the beeswax thing I'd be willing to put money on - fwiw.
Incidentally, I still have not installed the 2nd wax
My memory certainly hasn't improved with age.Not much else seems to have, either...But, the beeswax thing I'd be willing to put money on - fwiw.
Incidentally, I still have not installed the 2nd wax
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By
widgethunter
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#179842
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Re: 547 HV Transformer: Bill Schell rewind failed
Hi Bernd,
I guess the biggest indicator of a scatter wind would be
the presence of a spool. The universal wind doesn't require
any additional support.
In addition to talking to you, I talked to
Hi Bernd,
I guess the biggest indicator of a scatter wind would be
the presence of a spool. The universal wind doesn't require
any additional support.
In addition to talking to you, I talked to
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By
Chuck Harris
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#179841
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Re: 547 HV Transformer: Bill Schell rewind failed
Roger:
If's beeswax (It could be paraffin wax, or a silicone wax, or some other wax type potting...or not even wax)
If it's beeswax... and you want to verify... put a tiny scraping of it in a spoon,
Roger:
If's beeswax (It could be paraffin wax, or a silicone wax, or some other wax type potting...or not even wax)
If it's beeswax... and you want to verify... put a tiny scraping of it in a spoon,
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By
Roy Thistle
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#179840
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Re: 7104 readout issue
Sean,
A friend of mine found a burned resistor and bad TO-5 metal can transistor on the Readout Board in a military version of the 7603. The R was 3.9k, the TO-5 can something like a 2n2905 or
Sean,
A friend of mine found a burned resistor and bad TO-5 metal can transistor on the Readout Board in a military version of the 7603. The R was 3.9k, the TO-5 can something like a 2n2905 or
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By
Steven Bender
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#179839
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Re: Tek 2782
Hi Steve,
I can think of a few possibilities... maybe the tilting caused something to short, blowing a fuse or some circuitry. Maybe a board became disconnected. Maybe a PS line got pulled from its
Hi Steve,
I can think of a few possibilities... maybe the tilting caused something to short, blowing a fuse or some circuitry. Maybe a board became disconnected. Maybe a PS line got pulled from its
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By
Steven Bender
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#179838
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Re: [Tek 485] No intensity control
Look OK.
Looks OK.
This is a very large resistor, you won't be able to get a good read without removing a leg. I recommend checking C1537 first, see below.
I just noticed C1537 is an electrolytic
Look OK.
Looks OK.
This is a very large resistor, you won't be able to get a good read without removing a leg. I recommend checking C1537 first, see below.
I just noticed C1537 is an electrolytic
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By
Ozan
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#179837
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