Date   

Re: TEKTRONIX 491 measuring wifi signals

Jim Ford
 

I stand corrected (not all that unusual).  Thanks, Chuck.  My guess would be that microwave oven manufacturers either don't know about or don't want to deal with the subtleties of magnetron anode and filament voltages and currents.JimSent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: Chuck Harris <cfharris@...> Date: 3/23/20 7:37 PM (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] TEKTRONIX 491 measuring wifi signals 30 years ago, I worked with a company that made power sourcesout of commercial microwave oven transformers.  I can tell youwith out reservation that magnetrons will work to produce powerover a wide range of anode voltages, and power levels.They are not just on and off devices.The efficiency varies on anode voltage, and the power curve isanything but linear, but we used them from about 10W to about900W by driving the anode transformer with a variac.The important trick was you had to provide the filament voltagewith a separate transformer, as they won't work if the filamentisn't hot.I used a 491 for several years, and at the first opportunityto ditch it and replace it with *any* other spectrum analyzer,I did.  I chose an Ailtech 707.Fundamentally the problem with the 491 is it has a fixedfirst mixer, and a swept IF, with an unbalanced mixer.This means that the IF band gets through the mixer with muchless loss than the desired signal.  If you are in an RF richenvironment... lots of TV, public service, and FM radio stations,you will have a porcupine of fixed position spurs on your screenat all times... leakage through the mixer to the IF.On the other hand, it works quite well if you are using one ofthe higher bands that doesn't include DC.-Chuck HarrisJim Ford wrote:> Yep, a magnetron is completely on or completely off.  No in between.  A virtue of solid state RF cooking devices touted by NXP and others is that solid state can be ramped up and down for more even heating.  I'm sure the new ovens are way more expensive than the magnetron types after 80 or so years of production of the latter.  Will come down just like solid state displays did.Jim Ford Sent from my Verizon, Samsung Galaxy smartphone> -------- Original message --------From: Albert Otten <aodiversen@...> Date: 3/23/20  2:52 PM  (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] TEKTRONIX 491 measuring wifi signals It's also a nice exercise to catch the leakage radiation of a microwave oven. I tried this after repair of my 491, at minimum magnetron power level. Then  I "discovered" (didn't know) that the power level is controlled by the on/off duty cycle of full power. At minimum power there is no radiation at all most of the time.AlbertOn Sun, Mar 22, 2020 at 10:58 PM, Miguel Work wrote:>> 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: Tek Blue Paint

Brendan
 

The closest I have been able to come is Bahama Sea by Krylon.


Re: TEKTRONIX 491 measuring wifi signals

Chuck Harris
 

Microwave oven magnetrons, not transformers... bad brain!

Chuck Harris wrote:

30 years ago, I worked with a company that made power sources
out of commercial microwave oven transformers. I can tell you
with out reservation that magnetrons will work to produce power
over a wide range of anode voltages, and power levels.

They are not just on and off devices.

The efficiency varies on anode voltage, and the power curve is
anything but linear, but we used them from about 10W to about
900W by driving the anode transformer with a variac.

The important trick was you had to provide the filament voltage
with a separate transformer, as they won't work if the filament
isn't hot.

I used a 491 for several years, and at the first opportunity
to ditch it and replace it with *any* other spectrum analyzer,
I did. I chose an Ailtech 707.

Fundamentally the problem with the 491 is it has a fixed
first mixer, and a swept IF, with an unbalanced mixer.

This means that the IF band gets through the mixer with much
less loss than the desired signal. If you are in an RF rich
environment... lots of TV, public service, and FM radio stations,
you will have a porcupine of fixed position spurs on your screen
at all times... leakage through the mixer to the IF.

On the other hand, it works quite well if you are using one of
the higher bands that doesn't include DC.

-Chuck Harris



Jim Ford wrote:
Yep, a magnetron is completely on or completely off.  No in between.  A virtue of solid state RF cooking devices touted by NXP and others is that solid state can be ramped up and down for more even heating.  I'm sure the new ovens are way more expensive than the magnetron types after 80 or so years of production of the latter.  Will come down just like solid state displays did.Jim Ford Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: Albert Otten <aodiversen@...> Date: 3/23/20 2:52 PM (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] TEKTRONIX 491 measuring wifi signals It's also a nice exercise to catch the leakage radiation of a microwave oven. I tried this after repair of my 491, at minimum magnetron power level. Then  I "discovered" (didn't know) that the power level is controlled by the on/off duty cycle of full power. At minimum power there is no radiation at all most of the time.AlbertOn Sun, Mar 22, 2020 at 10:58 PM, Miguel Work wrote:>> 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: TEKTRONIX 491 measuring wifi signals

Chuck Harris
 

30 years ago, I worked with a company that made power sources
out of commercial microwave oven transformers. I can tell you
with out reservation that magnetrons will work to produce power
over a wide range of anode voltages, and power levels.

They are not just on and off devices.

The efficiency varies on anode voltage, and the power curve is
anything but linear, but we used them from about 10W to about
900W by driving the anode transformer with a variac.

The important trick was you had to provide the filament voltage
with a separate transformer, as they won't work if the filament
isn't hot.

I used a 491 for several years, and at the first opportunity
to ditch it and replace it with *any* other spectrum analyzer,
I did. I chose an Ailtech 707.

Fundamentally the problem with the 491 is it has a fixed
first mixer, and a swept IF, with an unbalanced mixer.

This means that the IF band gets through the mixer with much
less loss than the desired signal. If you are in an RF rich
environment... lots of TV, public service, and FM radio stations,
you will have a porcupine of fixed position spurs on your screen
at all times... leakage through the mixer to the IF.

On the other hand, it works quite well if you are using one of
the higher bands that doesn't include DC.

-Chuck Harris



Jim Ford wrote:

Yep, a magnetron is completely on or completely off.  No in between.  A virtue of solid state RF cooking devices touted by NXP and others is that solid state can be ramped up and down for more even heating.  I'm sure the new ovens are way more expensive than the magnetron types after 80 or so years of production of the latter.  Will come down just like solid state displays did.Jim Ford Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: Albert Otten <aodiversen@...> Date: 3/23/20 2:52 PM (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] TEKTRONIX 491 measuring wifi signals It's also a nice exercise to catch the leakage radiation of a microwave oven. I tried this after repair of my 491, at minimum magnetron power level. Then  I "discovered" (didn't know) that the power level is controlled by the on/off duty cycle of full power. At minimum power there is no radiation at all most of the time.AlbertOn Sun, Mar 22, 2020 at 10:58 PM, Miguel Work wrote:>> 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!


Craigslist; Lynchburg, VA: 7xxx Scope

John Clark
 

Anyone in the Lynchburg, VA area interested in a 7xxx scope with plug-ins? I'm not familiar enough with them to know exactly which model it is from the single picture but looks to be free for the first one to come pick it up. Listing says it works. I've no affiliation with the owner. It just popped up in a saved search I have.

https://lynchburg.craigslist.org/zip/d/lynchburg-tektronix-oscilloscope/7097981758.html
[https://images.craigslist.org/01717_JnH9hntqVw_600x450.jpg]<https://lynchburg.craigslist.org/zip/d/lynchburg-tektronix-oscilloscope/7097981758.html>
Tektronix Oscilloscope - free stuff<https://lynchburg.craigslist.org/zip/d/lynchburg-tektronix-oscilloscope/7097981758.html>
To the best of our knowledge, this works! Will remove listing once someone picks it up. Please...
lynchburg.craigslist.org

John
Charlotte, NC


Re: Type O plugin

Randy Newman
 

The closest thing to the Type O would be the AM- 501, which provides
terminals for Op Amp gain, and other compensation. Of course, then you need
a TM500 chassis.

On Mon, Mar 16, 2020, 7:17 AM cmjones01 <chris@...> wrote:

I've just acquired a Type 'O' operational amplifier plugin, in good,
tidy condition apart from the lack of a few valves (the 6DJ8/ECC88s
had disappeared, of course, and a couple of 12AU6s had gone astray).
I'm looking forward to getting it working

I find the idea of being able to perform mathematical waveform
manipulation in the analogue domain fascinating, and it's certainly a
great trick for my trusty 535A to have up its sleeve.

My question is, though, why didn't the later transistorised scopes
have a similar plugin? There was the 3A8, but nothing equivalent for
the 5000 or 7000 series as far as I can tell. I can see that digital
scopes removed most of the need for such a plugin in the 1980s, but
that leaves a gap after the 500/560 series. Maybe the idea of the
operational amplifier's flexibility is nice, but it turned out not to
be so useful in practice?

Chris




Re: TEKTRONIX 491 measuring wifi signals

Jim Ford
 

Yep, a magnetron is completely on or completely off.  No in between.  A virtue of solid state RF cooking devices touted by NXP and others is that solid state can be ramped up and down for more even heating.  I'm sure the new ovens are way more expensive than the magnetron types after 80 or so years of production of the latter.  Will come down just like solid state displays did.Jim Ford Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: Albert Otten <aodiversen@...> Date: 3/23/20 2:52 PM (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] TEKTRONIX 491 measuring wifi signals It's also a nice exercise to catch the leakage radiation of a microwave oven. I tried this after repair of my 491, at minimum magnetron power level. Then  I "discovered" (didn't know) that the power level is controlled by the on/off duty cycle of full power. At minimum power there is no radiation at all most of the time.AlbertOn Sun, Mar 22, 2020 at 10:58 PM, Miguel Work wrote:>> 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: Mr Carlson's Patreon and test tool designs - was Re: [TekScopes] enclosures for ESR meters

Harvey White
 

Making PC boards is not really a trivial task.  Toner transfer needs a laser printer and some understanding of the process, regardless of whether or not you use it for an ESR meter or some thing different for a Tektronix rebuild.  Toner transfer can best be used on single sided boards, but double sided boards are possible.  Requires more understanding and the right tools.  The board factories (oshpark and any of the Chinese board factories, for instance) tend to make boards in lots (oshpark is $5 per square inch, but you get 3, gold plated (ENIG) boards.  The Chinese factories typically have (IMHO) a 100 mm by 100 mm maximum size, lots of 5 or 10, and very low prices for HASL (Hot air solder leveled) boards.  A typical cheap price is 10 boards for $5.00, with about 20 to 25 dollars for shipping.

All varies per manufacturer.  They want gerber files, but will give you the algorithms (files) for the CAM manufacturing of their boards from popular files.  I use EAGLE (7.7).  These boards are silk screened, double sided, plated through holes.

Any boards I can make with toner transfer (disassembled the setup, BTW) would be double sided, tin lead plated, NO plated through holes, NO silk screening.  It took me a while to get there.

I did a LOT of toner transfer boards (laser printer, laminator, special paper) before my designs got too complex for manual layout and toner transfer.

There's lots of low cost, low effort  PC board techniques. Haven't seen the target project, so I can't comment.  There are a number of projects directly related to Tektronix that can use PC boards.  I'd suggest test fixtures for the 7CT1N, for example.

Feel free to contact me off list if you want further information.

Harvey

On 3/23/2020 6:34 PM, David Kuhn wrote:
" “He strongly recommends that you make the boards using the toner transfer
method.”

I only have ink jet. Still it's a lot of work and I do not need to learn to
make PCBs. I've always use 4PCB.com for that and I do not want to have to
use chemicals.

On Mon, Mar 23, 2020 at 2:05 PM Eric <ericsp@...> wrote:

I have been a member of Paul’s patron since the beginning. Just to be
transparent. I have seen this question asked many times. Paul’s response is
usually the same. “He strongly recommends that you make the boards using
the toner transfer method.” I have done so personally and have learned a
staggering amount especially in the QA department having to quality check
my own boards. It has also given me a much better understanding of what is
really going on. There is a lot of learning building it completely from
scratch.


-----Original Message-----
From: TekScopes@groups.io <TekScopes@groups.io> On Behalf Of Abc Xyz
Sent: Monday, March 23, 2020 2:02 PM
To: TekScopes@groups.io
Subject: Re: Mr Carlson's Patreon and test tool designs - was Re:
[TekScopes] enclosures for ESR meters

it would be nice to have a Board.

On Mon, Mar 23, 2020, 10:52 AM David Kuhn <Daveyk021@...> wrote:

" Mr. Carlson does not usually do commercially produced"

So then I suspect he does not have gerber files to download? It would
be possible to lay it out in CircuitMake/TraxMaker, but if the circuit
uses somewhat modern components, then one would have to create macros
for them.
As I said, I think a minimal of 5 proto boards would be needed. So if
the board works, there would be extras. Since it is Paul's i.p. you
would not be able to see those extra boards of five of us wanted to
make the cap tester.

dave

On Sun, Mar 22, 2020 at 10:02 PM Mlynch001 <@mlynch001> wrote:

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










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

David Kuhn
 

Who wants to take the lead on making a PCB? I will join his patreon
tonight. I assume he does not have gerbers published for his cap tester?

Dave

On Mon, Mar 23, 2020 at 3:04 PM Renée <@rjdeeter> wrote:

I think the only honorable requirement would be that all parties
receiving boards MUST be patrons, and this must also be done quietly/
not too publically.
If the above conditions are met I would think he should not refuse the
idea...again just not make it to public.....ie a few friends.....
Renée



On 3/23/20 11:27 AM, toby@... wrote:
On 2020-03-23 1:53 PM, David Kuhn wrote:
" It's not obvious to me. My obvious is to ask if 5 people want to go
in
together on a set with shipping from oshpark.com or pcbway.com"

Yes! ...but it's Paul's I.P., so, I guess one would have to eat the
extra 4
boards and let everyone else order 5 boards each and toss the extras.
Maybe someone could get permission from Paul to have 5 boards made and
share the spare boards?
Yeah I agree it is a grey area if the other people aren't on Patreon. I
didn't think about that angle.

Best thing is to ask him! He seems nice... :)

On Mon, Mar 23, 2020 at 10:03 AM John Griessen <@jgriessen>
wrote:

On 3/22/20 9:01 PM, Mlynch001 wrote:
Mr. Carlson does not usually do commercially produced boards and
the
practice is discouraged on Patreon, for obvious reasons.

It's not obvious to me. My obvious is to ask if 5 people want to go in
together on a set with shipping from oshpark.com or pcbway.com








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

David Kuhn
 

" “He strongly recommends that you make the boards using the toner transfer
method.”

I only have ink jet. Still it's a lot of work and I do not need to learn to
make PCBs. I've always use 4PCB.com for that and I do not want to have to
use chemicals.

On Mon, Mar 23, 2020 at 2:05 PM Eric <ericsp@...> wrote:

I have been a member of Paul’s patron since the beginning. Just to be
transparent. I have seen this question asked many times. Paul’s response is
usually the same. “He strongly recommends that you make the boards using
the toner transfer method.” I have done so personally and have learned a
staggering amount especially in the QA department having to quality check
my own boards. It has also given me a much better understanding of what is
really going on. There is a lot of learning building it completely from
scratch.


-----Original Message-----
From: TekScopes@groups.io <TekScopes@groups.io> On Behalf Of Abc Xyz
Sent: Monday, March 23, 2020 2:02 PM
To: TekScopes@groups.io
Subject: Re: Mr Carlson's Patreon and test tool designs - was Re:
[TekScopes] enclosures for ESR meters

it would be nice to have a Board.

On Mon, Mar 23, 2020, 10:52 AM David Kuhn <Daveyk021@...> wrote:

" Mr. Carlson does not usually do commercially produced"

So then I suspect he does not have gerber files to download? It would
be possible to lay it out in CircuitMake/TraxMaker, but if the circuit
uses somewhat modern components, then one would have to create macros
for them.
As I said, I think a minimal of 5 proto boards would be needed. So if
the board works, there would be extras. Since it is Paul's i.p. you
would not be able to see those extra boards of five of us wanted to
make the cap tester.

dave

On Sun, Mar 22, 2020 at 10:02 PM Mlynch001 <@mlynch001> wrote:

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












Re: 93 posts in 7 days about ESR meters IS THERE ANYTHING LEFT TO SAY?

 

Hi Dennis,

I want to make a last post about this topic.
It is highly specific of Tektronix and the ESR measurement.

I convert my newly restored 547 Tektronix oscilloscope into a unique ESR meter. This gives me enjoyment of using this superb Tektronix instrument.
As I commented before, I clip the electrolytic cap under test between the ground and the tip of a Tektronix X1 probe.
The cap can be loose or in-circuit. The polarity really doesn't matter.
I inject from my Tektronix FG502 function generator (which I enjoy using) with a 10 volt 100 Khz (or other frequency) signal (sine, triangular or whatever), a 10 mA current through THE 1 Kohm resistor, with whose end I touch the capacitor lead where the probe attaches. And I see on the oscilloscope, at 10 mV/div, the ESR in the scale of 1 ohm /div. If the FG502 signal is displayed on another channel of the 1A4 plug-in, I can visually verify that the ESR I see is indeed the resistive component of the cap's impedance.

I had to chuckle when I read this new thread, "enclosures for ESR meters", and I visualized my 1 Kohm resistor carefully kept in the enclosure of a little golden box.
But no, it is in my regular box with other resistors, not segregated since I can read the color code.

My "Tektronix ESR Meter" is so simple that I can make a measurement in about the same average time any of the 8,000 readers takes to read and delete my post.

Regards,
Ernesto


Re: TEKTRONIX 491 measuring wifi signals

Albert Otten
 

It's also a nice exercise to catch the leakage radiation of a microwave oven. I tried this after repair of my 491, at minimum magnetron power level. Then I "discovered" (didn't know) that the power level is controlled by the on/off duty cycle of full power. At minimum power there is no radiation at all most of the time.
Albert

On Sun, Mar 22, 2020 at 10:58 PM, Miguel Work wrote:


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: 93 posts in 7 days about ESR meters IS THERE ANYTHING LEFT TO SAY?

David Holland
 

There is a convenient "Mute this Topic", at the bottom of every message if
email subscribed, and things go too far afield... I've used it a number
of times...

On Mon, Mar 23, 2020 at 3:49 PM Jean-Paul <jonpaul@...> wrote:

Dear Dennis: Perfict, my sentiments exactly!

Is there a way to stop OT posts before huge threads start, eg some
moderation robot to cordially inform the poster of the specific focus of
our group?

Many thanks!

Jean-Paul




Re: 93 posts in 7 days about ESR meters IS THERE ANYTHING LEFT TO SAY?

Jean-Paul
 

Dear Dennis: Perfict, my sentiments exactly!

Is there a way to stop OT posts before huge threads start, eg some moderation robot to cordially inform the poster of the specific focus of our group?

Many thanks!

Jean-Paul


Re: 93 posts in 7 days about ESR meters IS THERE ANYTHING LEFT TO SAY?

EricJ
 

I tried to post a message about this needing to go off-list earlier today but it got bounced for some reason.

--Eric

On Mar 23, 2020 2:02 PM, Dennis Tillman W7PF <@Dennis_Tillman_W7pF> wrote:




This is obviously a topic of great interest (There are over 450 posts
mentioning ESR meters in our archives) to some TekScopes members but what
about the rest of us?

In the past week I have deleted 93* (see below) messages, an average of 13
a day, about ESR Meters. Multiply that by thousands of members and it adds
up to a considerable amount of time. Unless there is some aspect of ESR
meters that still needs to be said THAT IS SPECIFIC TO TEKTRONIX PRODUCTS
I would ask you to think twice about the time it will take for 8,000 other
people to delete your post.

Instead, it would be more useful if you were to search for, and then
become a member of, a group specifically devoted to Equivalent Series
Resistance Instruments, Capacitance Checkers, and the granddaddy of them
all: The Dick Smith ESR Checker and all its variations.

In the past week:
* 68 messages in 7 days on the subject of "recommended ESR meters these
days".
* 11 messages on the subject of "enclosures for ESR meters".
* 14 messages on the subject of "Mr Carlson's Patreon and test tool
designs".

Dennis Tillman W7pF




--
Dennis Tillman W7PF
TekScopes Moderator






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

Renée
 

I think the only honorable requirement would be that all parties receiving boards MUST be patrons, and this must also be done quietly/ not too publically.
If the above conditions are met I would think he should not refuse the idea...again just not make it to public.....ie a few friends.....
Renée

On 3/23/20 11:27 AM, toby@... wrote:
On 2020-03-23 1:53 PM, David Kuhn wrote:
" It's not obvious to me. My obvious is to ask if 5 people want to go in
together on a set with shipping from oshpark.com or pcbway.com"

Yes! ...but it's Paul's I.P., so, I guess one would have to eat the extra 4
boards and let everyone else order 5 boards each and toss the extras.
Maybe someone could get permission from Paul to have 5 boards made and
share the spare boards?
Yeah I agree it is a grey area if the other people aren't on Patreon. I
didn't think about that angle.

Best thing is to ask him! He seems nice... :)

On Mon, Mar 23, 2020 at 10:03 AM John Griessen <@jgriessen> wrote:

On 3/22/20 9:01 PM, Mlynch001 wrote:
Mr. Carlson does not usually do commercially produced boards and the
practice is discouraged on Patreon, for obvious reasons.

It's not obvious to me. My obvious is to ask if 5 people want to go in
together on a set with shipping from oshpark.com or pcbway.com




93 posts in 7 days about ESR meters IS THERE ANYTHING LEFT TO SAY?

 

This is obviously a topic of great interest (There are over 450 posts mentioning ESR meters in our archives) to some TekScopes members but what about the rest of us?

In the past week I have deleted 93* (see below) messages, an average of 13 a day, about ESR Meters. Multiply that by thousands of members and it adds up to a considerable amount of time. Unless there is some aspect of ESR meters that still needs to be said THAT IS SPECIFIC TO TEKTRONIX PRODUCTS I would ask you to think twice about the time it will take for 8,000 other people to delete your post.

Instead, it would be more useful if you were to search for, and then become a member of, a group specifically devoted to Equivalent Series Resistance Instruments, Capacitance Checkers, and the granddaddy of them all: The Dick Smith ESR Checker and all its variations.

In the past week:
* 68 messages in 7 days on the subject of "recommended ESR meters these days".
* 11 messages on the subject of "enclosures for ESR meters".
* 14 messages on the subject of "Mr Carlson's Patreon and test tool designs".

Dennis Tillman W7pF




--
Dennis Tillman W7PF
TekScopes Moderator


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

toby@...
 

On 2020-03-23 1:53 PM, David Kuhn wrote:
" It's not obvious to me. My obvious is to ask if 5 people want to go in
together on a set with shipping from oshpark.com or pcbway.com"

Yes! ...but it's Paul's I.P., so, I guess one would have to eat the extra 4
boards and let everyone else order 5 boards each and toss the extras.
Maybe someone could get permission from Paul to have 5 boards made and
share the spare boards?
Yeah I agree it is a grey area if the other people aren't on Patreon. I
didn't think about that angle.

Best thing is to ask him! He seems nice... :)


On Mon, Mar 23, 2020 at 10:03 AM John Griessen <@jgriessen> wrote:

On 3/22/20 9:01 PM, Mlynch001 wrote:
Mr. Carlson does not usually do commercially produced boards and the
practice is discouraged on Patreon, for obvious reasons.

It's not obvious to me. My obvious is to ask if 5 people want to go in
together on a set with shipping from oshpark.com or pcbway.com





Re: Pilot error on TDS3000B or ?

 

On Mon, Mar 23, 2020 at 06:21 PM, Chuck Harris wrote:


Mostly it is because it is easier to read. If the
scope continues in its trigger, store, display mode,
the trace hops from trigger to trigger on the screen.
That has been my understanding.

Raymond


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

Eric
 

I have been a member of Paul’s patron since the beginning. Just to be transparent. I have seen this question asked many times. Paul’s response is usually the same. “He strongly recommends that you make the boards using the toner transfer method.” I have done so personally and have learned a staggering amount especially in the QA department having to quality check my own boards. It has also given me a much better understanding of what is really going on. There is a lot of learning building it completely from scratch.

-----Original Message-----
From: TekScopes@groups.io <TekScopes@groups.io> On Behalf Of Abc Xyz
Sent: Monday, March 23, 2020 2:02 PM
To: TekScopes@groups.io
Subject: Re: Mr Carlson's Patreon and test tool designs - was Re: [TekScopes] enclosures for ESR meters

it would be nice to have a Board.

On Mon, Mar 23, 2020, 10:52 AM David Kuhn <Daveyk021@...> wrote:

" Mr. Carlson does not usually do commercially produced"

So then I suspect he does not have gerber files to download? It would
be possible to lay it out in CircuitMake/TraxMaker, but if the circuit
uses somewhat modern components, then one would have to create macros for them.
As I said, I think a minimal of 5 proto boards would be needed. So if
the board works, there would be extras. Since it is Paul's i.p. you
would not be able to see those extra boards of five of us wanted to
make the cap tester.

dave

On Sun, Mar 22, 2020 at 10:02 PM Mlynch001 <@mlynch001> wrote:

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