Date   

Re: enclosures for ESR meters

Mlynch001
 

On Sun, Mar 22, 2020 at 05:14 PM, David Kuhn wrote:


Are the details available to a as minimal patrion account? Is there gerber
files for the pcb? Or can it be breadboarded?

It looks like a great leakage detector.

Dave

On Sun, Mar 22, 2020 at 3:12 PM Mlynch001 <@mlynch001> wrote:

“ I would also like the cap tester (with leakage) that Mr.Carlson
designed
(see Mr. Carlson's Lab on YouTube. That looks like a magic device. I am
not a patreon of his, so I can not get the details. I wish someone offered
that as a kit.“

I built one of those testers. They are very useful. Built two versions,
one with an analog meter and one with the LED display and variable test
voltages. This is a superb piece of test gear. Excellent and compact
instrument.
Dave,

Yes, the files are all there and only $2/ Month. Plus many other videos. The Cap tester project covered quite a few videos as Mr. Carlson explains how each section of the design works. As this is intended to stay as a "Patreon Exclusive Project", I don't beleive that there is a Gerber file, we etched our own PC boards. It definitely can be built on a breadboard, that was how I did it the first time. There have been some additional enhancements since I built mine, But I left well enough alone. The original design runs off a battery, but I made mine run from a bench supply. I also added a multiple voltage feature. There are so many things that this can be used for. This is a super sensitive circuit and very useful. Well worth $2 a month and if you don't want a long term commitment, build the tester and then you can simply quit Patreon. Mr. Carlson shares a lot of useful tips and ideas, beside this wonderful little tester.

--
Michael Lynch
Dardanelle, AR


Mr Carlson's Patreon and test tool designs - was Re: [TekScopes] enclosures for ESR meters

toby@...
 

On 2020-03-22 6:14 PM, David Kuhn wrote:
Are the details available to a as minimal patrion account? Is there gerber
files for the pcb? Or can it be breadboarded?

It looks like a great leakage detector.
Mr Carlson's Patreon starts at $2/month and it's worth every penny, in
my opinion.

He publishes PCBs and schematics along with video walkthroughs.

--Toby


Dave

On Sun, Mar 22, 2020 at 3:12 PM Mlynch001 <@mlynch001> wrote:

“ I would also like the cap tester (with leakage) that Mr.Carlson designed
(see Mr. Carlson's Lab on YouTube. That looks like a magic device. I am
not a patreon of his, so I can not get the details. I wish someone offered
that as a kit.“

I built one of those testers. They are very useful. Built two versions,
one with an analog meter and one with the LED display and variable test
voltages. This is a superb piece of test gear. Excellent and compact
instrument.
--
Michael Lynch
Dardanelle, AR





Re: fuzzy trace, weakish trace

John Gord
 

Aldue,
If you turn on the BW limit it might help with the fuzzy trace. The 464 is a storage scope, and if I recall correctly it is not nearly as bright as the plain 465 when in non-store mode. Does it meet its specs for single-shot stored writing speed? (110 divisions/usec in FAST mode.)
--John Gord


Re: enclosures for ESR meters

David Kuhn
 

Are the details available to a as minimal patrion account? Is there gerber
files for the pcb? Or can it be breadboarded?

It looks like a great leakage detector.

Dave

On Sun, Mar 22, 2020 at 3:12 PM Mlynch001 <@mlynch001> wrote:

“ I would also like the cap tester (with leakage) that Mr.Carlson designed
(see Mr. Carlson's Lab on YouTube. That looks like a magic device. I am
not a patreon of his, so I can not get the details. I wish someone offered
that as a kit.“

I built one of those testers. They are very useful. Built two versions,
one with an analog meter and one with the LED display and variable test
voltages. This is a superb piece of test gear. Excellent and compact
instrument.
--
Michael Lynch
Dardanelle, AR




TEKTRONIX 491 measuring wifi signals

Miguel Work
 

I have made a little video showing the Tektronix 491 with wifi signals, at 2.4 Ghz. I now that is a crude SA, but is nice fast showing these signals compared with the 7L14 that I have in my workbench.

https://www.youtube.com/watch?v=fCwKErcqJiY&feature=youtu.be

Regards!


Re: Type O plugin

cmjones01
 

On Tue, Mar 17, 2020 at 11:25 AM Roger Evans via Groups.Io
<very_fuzzy_logic=yahoo.com@groups.io> wrote:

Might it have been the difficulty of getting the useful bandwidth of the opamp anywhere near the 100MHz - 500Mhz capability of the normal signal input?
That's a good thought. The 15MHz bandwidth of my 535A is much less challenging.

Having fitted valves in the empty sockets, squirted the switches and
pots with DeoxIT and made a few minor adjustments, the plugin appears
to work perfectly. It's about as fiddly as I'd expect vacuum-state
opamps to be, but pretty neat. It's easy to set it up to integrate the
calibrator squarewave into a triangle wave, then differentiate it back
into a square wave again, or differentiate that squarewave into a
series of narrow, almost invisible alternating spikes, then integrate
those back in to a decent-looking squarewave. I'm impressed with it as
a functional curiosity and I'll probably find real uses for it too,
even if just educating my children about op-amp circuits.

Chris


fuzzy trace, weakish trace

aldue
 

Hi, I am a rookie, aldue, My first Tek, a 464 is still laughing at me. I found some bad parts and replaced the yet, the trace is still too fuzzy and much weaker than it should be. Could ripple on the 140 V power be my problem? Ripple must be around 1 V p-p. High Voltage and cathode Volts measure good.


Re: enclosures for ESR meters

Mlynch001
 

“ I would also like the cap tester (with leakage) that Mr.Carlson designed
(see Mr. Carlson's Lab on YouTube. That looks like a magic device. I am
not a patreon of his, so I can not get the details. I wish someone offered
that as a kit.“

I built one of those testers. They are very useful. Built two versions, one with an analog meter and one with the LED display and variable test voltages. This is a superb piece of test gear. Excellent and compact instrument.
--
Michael Lynch
Dardanelle, AR


Re: enclosures for ESR meters

Carsten Bormann
 

On 2020-03-22, at 17:19, David Kuhn <Daveyk021@...> wrote:

I would also like the cap tester (with leakage) that Mr.Carlson designed
(see Mr. Carlson's Lab on YouTube. That looks like a magic device. I am
not a patreon of his, so I can not get the details. I wish someone offered
that as a kit.
I’d recommend: Find a HP 4329A. Less magic, more actual hard data.
(The Keithley 616 is also useful, but has less control over the voltages used, IIRC, and leaves you with that legacy 2-lug triax to fight with.)

Grüße, Carsten


Re: enclosures for ESR meters

David Kuhn
 

For the EDS-89A KIT, short finder, I ordered the parts kit from Miga,
$100 + $20 gold plated lead kit, $10 shipping, $28 PCB from Ebay and the
$35 recommended case. I think free shipping on the last two, I don't
remember. So, I have about $200.00 in the kit.

For the EDS-88A, ESR meter, I ordered it pre-built for $229.00 from the
place Dave Miga recommended. I had it two days later for $10 USPS
postage. Wow, it is the best ESR meter, I have seen.

Dave Miga is the professor of ultra-low resistance measurement.

I would also like the cap tester (with leakage) that Mr.Carlson designed
(see Mr. Carlson's Lab on YouTube. That looks like a magic device. I am
not a patreon of his, so I can not get the details. I wish someone offered
that as a kit.

Dave

On Sun, Mar 22, 2020 at 9:05 AM John Griessen <@jgriessen> wrote:

On 3/17/20 6:39 PM, Reginald Beardsley via Groups.Io wrote:
It's no longer sold, but there are PCBs on ebay and kits of parts
available from Dave Miga, the designer. Looks to be around $150 or so with
a good case.

Would it fit in a 16cm x 16cm x 6cm Hammond box? They have four stainless
screws that hold on the lid, are light grey plastic,
have a water seal, some screw bosses inside for PCB mounting... I have a
pile of project surplus ones I'll sell cheap.




enclosures for ESR meters

John Griessen
 

On 3/17/20 6:39 PM, Reginald Beardsley via Groups.Io wrote:
It's no longer sold, but there are PCBs on ebay and kits of parts available from Dave Miga, the designer. Looks to be around $150 or so with a good case.
Would it fit in a 16cm x 16cm x 6cm Hammond box? They have four stainless screws that hold on the lid, are light grey plastic, have a water seal, some screw bosses inside for PCB mounting... I have a pile of project surplus ones I'll sell cheap.


Re: Tek scopes on the job at NASA

Michael A. Terrell
 

For all the times they mentioned Telemetry, I only recognized one piece of
Telemetry equipment. It was either one of the last Defense Electronics
designs, or the first Microdyne 1100 series. They were designed by the same
engineers. Either way, both companies used Tektronix scopes. I believe the
Pinoneer was tracked by one of the very first Microdyne units. It was still
operating flawlessly after 30 years of continuous operation.It had never
been powered down or pulled from the rack. It takes good equipment to
design good equipment.

On Thu, Mar 19, 2020 at 11:52 PM Albert LaFrance <
albert.lafrance@...> wrote:

And there are a lot of them in this wonderful 1960s film about NASA's
communications hub, the Goddard Space Flight Center in Greenbelt, MD:

< <https://www.youtube.com/watch?v=FasWGbEGx2w>
https://www.youtube.com/watch?v=FasWGbEGx2w>



Albert







Re: 184 Time mark Gen. Needs filter caps

Tom Gardner
 

On 20/03/20 19:14, david via Groups.Io wrote:
Thanks Tom, you were right. I adjusted R306 in the 50mS divider circuit and all time marks are working now! Not a bad unit for $96.46 with shipping.
You're welcome; many people here have helped me, and it feels good to help other people.

But you don't want to know what I paid for mine :)

And a couple capacitors and PC boards. Thank you to everyone who helped me troubleshoot this, I will post picture of 50mS time marks after repair.
I'd prefer it if you posted pictures of the 50ms time marks. (Measuring time in Siemens is a pet hate of mine :) )


Tek Blue Paint

penguin2004au
 

Greetings group:
Just a thought on matching the panel colour on Tektronix equipment.
Was trying to get a match of the original engine colour of a car I was restoring and thought British Standard 381/175 Light French
Blue looked pretty close; but no, way off.
As an experiment tried stirring in some Deep Bronze Green, BS 381/224 and found I could get very close to a match for the engine.
Later noticed this was also very close to Tek Blue.
I am in Australia, don't know about the availability of BS colours Stateside.

Regards: John Foster


Re: 184 Time mark Gen. Needs filter caps

david
 

Thanks Tom, you were right. I adjusted R306 in the 50mS divider circuit and all time marks are working now! Not a bad unit for $96.46 with shipping. And a couple capacitors and PC boards. Thank you to everyone who helped me troubleshoot this, I will post picture of 50mS time marks after repair.
David


Silicone Rubber jacket wire, was Re: [TekScopes] Beware of cheap "crock-a-gator" clips

toby@...
 

On 2020-03-20 7:03 AM, Brian Symons wrote:
Does anyone know of a reasonably priced source of the double insulated silicon wire that has a different colour inner core so that you can see if the wire is worn or damaged?

I saw that silicon wire was fairly reasonably priced but haven't seen this type of wire.
Digikey has it.
e.g.

CN322R-25-ND
3122-20-1-0500-004-1-TS HOOK-UP STRND 20AWG 300V RED 25'

CN319B-25-ND
3122-20-1-0500-001-1-TS HOOK-UP STRND 20AWG 300V BLK 25'

CN323L-25-ND
3122-20-1-0500-005-1-TS HOOK-UP STRND 20AWG 300V BLU 25'

--Toby

I just thought if I was going to the effort of making up test leads then I might as well make them as good as possible.

Regards
Brian.



Re: TDS3000B calibration

David Kuhn
 

Bump? I am following your TDS3000 thread with great interest as I am a
huge fan of this series of oscilloscopes (even though I teethed on the old
round tube 500 series in Electronics Institute in the late '70s and use to
owned one (although I could not tell you which one anymore). The TDS3000
series is the most productive and makes the most money for the user, scope
ever released by any company.

Dave

On Fri, Mar 20, 2020 at 11:28 AM David C. Partridge <
@perdrix> wrote:

Bump?

David

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of David
C.
Partridge
Sent: 16 March 2020 11:28
To: TekScopes
Subject: [TekScopes] TDS3000B calibration

Why am I thinking of running a calibration? The trigger point is not
indicated correctly for faster signals - if I feed it a "fast rise" pulse
from the CG551AP, the trigger point is shown at about the 2% point of the
step signal even though the trigger is set to 50%. There a few other
things that weren't quite "on the mark" that I noticed as I ran through the
Training Manual. I'm hoping a calibration will sort all this out.

Timebase though appears "spot on" which is good. Is it possible to skip
steps in the calibration - no point re-doing the timebase calibration if it
is right ...

Before I attempt to run the full calibration procedure on my TDS3000B, I
want to be sure that I can generate all the necessary signals, and that the
nature of the signals is clearly called out in the calibration process once
it starts running.

I have SG503, SG504, CG551AP, and a CG5001 (with pulse heads for the last
two).

Cheers
David





Re: 184 Time mark Gen. Needs filter caps

david
 

Sorry fellas, the overshoot I was seeing was because I had trigger set to AC coupling. New Picture shows irregular intervals with DC trigger.
David


Re: TDS3000B calibration

 

Bump?

David

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of David C.
Partridge
Sent: 16 March 2020 11:28
To: TekScopes
Subject: [TekScopes] TDS3000B calibration

Why am I thinking of running a calibration? The trigger point is not
indicated correctly for faster signals - if I feed it a "fast rise" pulse
from the CG551AP, the trigger point is shown at about the 2% point of the
step signal even though the trigger is set to 50%. There a few other
things that weren't quite "on the mark" that I noticed as I ran through the
Training Manual. I'm hoping a calibration will sort all this out.

Timebase though appears "spot on" which is good. Is it possible to skip
steps in the calibration - no point re-doing the timebase calibration if it
is right ...

Before I attempt to run the full calibration procedure on my TDS3000B, I
want to be sure that I can generate all the necessary signals, and that the
nature of the signals is clearly called out in the calibration process once
it starts running.

I have SG503, SG504, CG551AP, and a CG5001 (with pulse heads for the last
two).

Cheers
David


Re: Type 184 Power Indicator Light

david
 

Dialight makes a led bulb 507-4859-3332-500, Vf=20V , mA=20, that fits that holder on the 184