Date   

Re: fuzzy trace, weakish trace

Roger Evans
 

Do you have the manual? It will give acceptable values for the ripple on all the low voltage power rails. You will find a manual on w140.com/tekwiki or get a high quality scan from Artek manuals.

Is this a problem with focus or with noise on the signal? If possible go to XY mode else use the slowest sweep speed. Turn down the intensity so the spot is just comfortably visible. Adjust focus and astigmatism alternately until you get no further improvement. Both controls should have a visible effect. Is the focus control now at one end of its range? If so it is likely the high value resistors in the focus chain may drifted in value.

Using one of your known good scopes look for noise or ripple on each of the deflection plates. Use the bandwidth limiter if it helps to reduce the noise.

Tell us how you get on.

Regards,

Roger


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

Jim Ford
 

I'm with you, Dave.  OSH Park and others have PCBs for dirt cheap these days.   No point in fabbing your own.  Been there, done that.Jim Ford Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: David Kuhn <Daveyk021@...> Date: 3/22/20 6:45 PM (GMT-08:00) To: TekScopes@groups.io Subject: Re: Mr Carlson's Patreon and test tool designs - was Re: [TekScopes] enclosures for ESR meters I etched my own boards years ago, when I was a kid in my teens. I haven’tdone it since and don’t want to. I don’tWant to have the chemicals aroundor to properly dispose of them. I’ve designed a few fairly complex PCBs in circuit maker/trax maker andhad them made by 4pcb, but again probably over 10 years ago. I would preferto be able to buy blank pcb’s if not a kit.Is this cap leakage meter of Mr. Carson’s able to be built without aprinted PCB? If not, does anyone have extra PCBs that they sell? I rememberwith 4pcb, I think 5 was the minimal prototype order, maybe 20.I will have to join and find out I guess. I can get all that information atthe $2 per month level?DaveOn Sun, Mar 22, 2020 at 8:06 PM Eric <ericsp@...> wrote:> I am also a patron worth every sent. The devices are top notch. Paul wants> people to make their own boards as a learning process. Extencive use of the> toner transfer method.>> On Sun, Mar 22, 2020, 7:20 PM <toby@...> wrote:>> > 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

aldue
 

Hi Roy, I am 75 years old and I got the scope new. It may have been new old
stock around 1981 or so. I should have picked a 466 however, this scope
was all I needed for my job. I have one 466 used, 2, 468s plus a 60 mHz
digital Tek. The 464 has been very lightly used as was too busy to get to
it until I retired. This scope has never been abused like 3 of the
others. Even the used and abused Teks work rather well. I rob parts from
another 466. I recall the new price was near $4400. I miss the clean
bright trace.

On Sun, Mar 22, 2020, 9:19 PM Roy Thistle <roy.thistle@...>
wrote:

On Sun, Mar 22, 2020 at 05:08 PM, aldue wrote:


I got this scope new.
Hi Aldue:
The 464 hasn't been made for almost 40 years.
Do you mean to say, you bought this some time around 1980?
Best regards and wishes.
Roy




Re: ESR meters

toby@...
 

On 2020-03-22 9:52 PM, battyhugh wrote:
Has anybody looked at this (and a good explanatory component)
There was absolutely no context to this message, can you repost
indicating what you're referring to?

H



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

toby@...
 

On 2020-03-22 9:45 PM, David Kuhn wrote:
I etched my own boards years ago, when I was a kid in my teens. I haven’t
done it since and don’t want to. I don’tWant to have the chemicals around
or to properly dispose of them.
I feel the same.

I’ve designed a few fairly complex PCBs in circuit maker/trax maker and
had them made by 4pcb, but again probably over 10 years ago. I would prefer
to be able to buy blank pcb’s if not a kit.

Is this cap leakage meter of Mr. Carson’s able to be built without a
printed PCB? If not, does anyone have extra PCBs that they sell? I remember
with 4pcb, I think 5 was the minimal prototype order, maybe 20.

I will have to join and find out I guess. I can get all that information at
the $2 per month level?
There's always OSHpark for PCBs. https://oshpark.com/

I understand if you ask nicely they might give a discount voucher to new
customers :-) But don't tell anyone

--Toby


Dave


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

Mlynch001
 

Dave,

I built one on Proto-Board my first try. It was tedious, but worked well. You can build on a breadboard, perf-board or etch your own. Mr. Carlson does not usually do commercially produced boards and the practice is discouraged on Patreon, for obvious reasons. I would not doubt that someone has produced some of these boards, but I do not know of a source myself.

--
Michael Lynch
Dardanelle, AR


ESR meters

battyhugh
 

Has anybody looked at this (and a good explanatory component)

H


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

David Kuhn
 

I etched my own boards years ago, when I was a kid in my teens. I haven’t
done it since and don’t want to. I don’tWant to have the chemicals around
or to properly dispose of them.

I’ve designed a few fairly complex PCBs in circuit maker/trax maker and
had them made by 4pcb, but again probably over 10 years ago. I would prefer
to be able to buy blank pcb’s if not a kit.

Is this cap leakage meter of Mr. Carson’s able to be built without a
printed PCB? If not, does anyone have extra PCBs that they sell? I remember
with 4pcb, I think 5 was the minimal prototype order, maybe 20.

I will have to join and find out I guess. I can get all that information at
the $2 per month level?

Dave

On Sun, Mar 22, 2020 at 8:06 PM Eric <ericsp@...> wrote:

I am also a patron worth every sent. The devices are top notch. Paul wants
people to make their own boards as a learning process. Extencive use of the
toner transfer method.

On Sun, Mar 22, 2020, 7:20 PM <toby@...> wrote:

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

Roy Thistle
 

On Sun, Mar 22, 2020 at 05:08 PM, aldue wrote:


I got this scope new.
Hi Aldue:
The 464 hasn't been made for almost 40 years.
Do you mean to say, you bought this some time around 1980?
Best regards and wishes.
Roy


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

toby@...
 

On 2020-03-22 7:20 PM, toby@... wrote:
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.
+ I intended to post the link: https://www.patreon.com/MrCarlsonsLab


--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: enclosures for ESR meters

battyhugh
 

Gee- wouldn't it be nice if people provided the links to these articles?
I'd love to get a ESR analysis device for a battery project.

Can some nice person please post them.

Thanks

Hugh (and keep safe).


Re: fuzzy trace, weakish trace

aldue
 

Hi John, I got this scope new. I am in non-store mode. I will have to
retest storage mode tomorrow. It has very few hours on it. It was bright
and clear. It was unused for months and came back exceedingly dim. I
replaced a cooked resistor, 2 transistors and one dented 4 kV capacitor. I
suspect ripple on some crt grids but I do not know much crt's. The bad
transistors wrecked the 140 Volts. Now I must crank the intensity near
max.. She used to be bright at a bit lower setting.

On Sun, Mar 22, 2020 at 6:47 PM johncharlesgord via Groups.Io <johngord=
verizon.net@groups.io> wrote:

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

Eric
 

I am also a patron worth every sent. The devices are top notch. Paul wants
people to make their own boards as a learning process. Extencive use of the
toner transfer method.

On Sun, Mar 22, 2020, 7:20 PM <toby@...> wrote:

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: 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.