Date   

Re: Tektronix 570 Vacuum Tube Curve Tracer on eBay

george edmonds
 

Hi

You hit in in one, Audio nuts, they can tell the shape of the getter in the valves/tubes in an audio amp by just listening to the wider deeper sound produced by the "correct" shaped getter. There is no fool like an Audio fool and they appear to have very deep pockets.

73 George G6HIG

On Sunday, 5 January 2020, 17:29:00 GMT, Jamie Ostrowski <jamie.ostrowski@...> wrote:

Tube traders and audio nuts use them for sure - especially for tube
matching.





On Sun, Jan 5, 2020 at 11:22 AM Richard Solomon <dickw1ksz@...> wrote:

Pardon me if this sounds like
Heresy, but what real world use
would have for one of these ?

I can see the "cool/nostalgia"
factor, but other than that, what
would one do with it ??

Thanks, Dick, W1KSZ

On Sun, Jan 5, 2020 at 8:32 AM Dave Daniel <kc0wjn@...> wrote:

I have been looking at sales of Tektronix 570s, mostly but not all on
ebay, for a long time now. All of then have had an asking price of around
$4k.

DaveD

Sent from a small flat thingy

On Jan 5, 2020, at 09:45, Eric <ericsp@...> wrote:

I would love to have a 570 in the lab but not for that that is nuts.


On 1/5/2020 9:36 AM, Mlynch001 wrote:
On Sat, Jan  4, 2020 at 10:48 PM, Dan Cordova wrote:

  For less than $200, I put together a Dennis Tillman VTCT board, and
modified
my Hickok Tube Tester to use with my Tektronix 575 curve tracer.  I
also made
the Daniel Schoo designed triode and pentode adapters for the
Tektronix 576
Curve Tracer at work.
I'm also not sure all my tubes and stereo gear are worth ~$4000 all
together.
    ;)
I KNOW my stereo gear is not worth that much!  I have the stuff to
build Dennis Tillman's VTCT and I have a 576 as well.  So even after I
buy
a suitable tube tester, I am sure that all told I would have less than
$1000 in the whole thing.  It might not do what the 570 will do, but
likely
95% as much and still test solid state devices as well.  You would need
to
have a serious desire or even more serious need for this thing in order
to
justify paying that price.  From the description, it sounds as though
this
thing is not quite ready to go as it is.  The elephant in the room is
getting it shipped to ones location without it being destroyed in the
process.  The seller does have a "Make an Offer" option as well.  This
will
be interesting to watch.








Re: Tektronix 570 Vacuum Tube Curve Tracer on eBay

Greg Muir
 

I'm sure that he probably has numerous Tek scopes and plugins in his back room missing all of their tubes. They will most likely be the next thing to show up on ePay.

Greg


Re: Tektronix 570 Vacuum Tube Curve Tracer on eBay

Jamie Ostrowski
 

Tube traders and audio nuts use them for sure - especially for tube
matching.

On Sun, Jan 5, 2020 at 11:22 AM Richard Solomon <dickw1ksz@...> wrote:

Pardon me if this sounds like
Heresy, but what real world use
would have for one of these ?

I can see the "cool/nostalgia"
factor, but other than that, what
would one do with it ??

Thanks, Dick, W1KSZ

On Sun, Jan 5, 2020 at 8:32 AM Dave Daniel <kc0wjn@...> wrote:

I have been looking at sales of Tektronix 570s, mostly but not all on
ebay, for a long time now. All of then have had an asking price of around
$4k.

DaveD

Sent from a small flat thingy

On Jan 5, 2020, at 09:45, Eric <ericsp@...> wrote:

I would love to have a 570 in the lab but not for that that is nuts.


On 1/5/2020 9:36 AM, Mlynch001 wrote:
On Sat, Jan 4, 2020 at 10:48 PM, Dan Cordova wrote:

For less than $200, I put together a Dennis Tillman VTCT board, and
modified
my Hickok Tube Tester to use with my Tektronix 575 curve tracer. I
also made
the Daniel Schoo designed triode and pentode adapters for the
Tektronix 576
Curve Tracer at work.
I'm also not sure all my tubes and stereo gear are worth ~$4000 all
together.
;)
I KNOW my stereo gear is not worth that much! I have the stuff to
build Dennis Tillman's VTCT and I have a 576 as well. So even after I
buy
a suitable tube tester, I am sure that all told I would have less than
$1000 in the whole thing. It might not do what the 570 will do, but
likely
95% as much and still test solid state devices as well. You would need
to
have a serious desire or even more serious need for this thing in order
to
justify paying that price. From the description, it sounds as though
this
thing is not quite ready to go as it is. The elephant in the room is
getting it shipped to ones location without it being destroyed in the
process. The seller does have a "Make an Offer" option as well. This
will
be interesting to watch.








Re: Tektronix 570 Vacuum Tube Curve Tracer on eBay

Dave Voorhis
 

On 5 Jan 2020, at 17:22, Richard Solomon <dickw1ksz@...> wrote:

Pardon me if this sounds like
Heresy, but what real world use
would have for one of these ?

I can see the "cool/nostalgia"
factor, but other than that, what
would one do with it ??
Sell matched pairs of 6L6’s on eBay with the tag “Matched using Tektronix 570” for bonus (read: marketable) audiophool “authenticity” and “vintage analog" cred.


Re: Tektronix 570 Vacuum Tube Curve Tracer on eBay

Richard Solomon <dickw1ksz@...>
 

Pardon me if this sounds like
Heresy, but what real world use
would have for one of these ?

I can see the "cool/nostalgia"
factor, but other than that, what
would one do with it ??

Thanks, Dick, W1KSZ

On Sun, Jan 5, 2020 at 8:32 AM Dave Daniel <kc0wjn@...> wrote:

I have been looking at sales of Tektronix 570s, mostly but not all on
ebay, for a long time now. All of then have had an asking price of around
$4k.

DaveD

Sent from a small flat thingy

On Jan 5, 2020, at 09:45, Eric <ericsp@...> wrote:

I would love to have a 570 in the lab but not for that that is nuts.


On 1/5/2020 9:36 AM, Mlynch001 wrote:
On Sat, Jan 4, 2020 at 10:48 PM, Dan Cordova wrote:

For less than $200, I put together a Dennis Tillman VTCT board, and
modified
my Hickok Tube Tester to use with my Tektronix 575 curve tracer. I
also made
the Daniel Schoo designed triode and pentode adapters for the
Tektronix 576
Curve Tracer at work.
I'm also not sure all my tubes and stereo gear are worth ~$4000 all
together.
;)
I KNOW my stereo gear is not worth that much! I have the stuff to
build Dennis Tillman's VTCT and I have a 576 as well. So even after I buy
a suitable tube tester, I am sure that all told I would have less than
$1000 in the whole thing. It might not do what the 570 will do, but likely
95% as much and still test solid state devices as well. You would need to
have a serious desire or even more serious need for this thing in order to
justify paying that price. From the description, it sounds as though this
thing is not quite ready to go as it is. The elephant in the room is
getting it shipped to ones location without it being destroyed in the
process. The seller does have a "Make an Offer" option as well. This will
be interesting to watch.






Re: Tektronix 570 Vacuum Tube Curve Tracer on eBay

Eric
 

SMU is source measure unit. From the KB i saw from Keithley there is a way to do curve tracing with the 2461 and the 2471. It requires 2 units at $9,600 each an interconnecting cable cat 5 on each out to a computer which has the Keithley lab suite software. I think the setup is one SMU for collector voltage and the other controls base current. The units sweep some set points then the software plots and excel style graph from the measured points. There was a KB that Keithley put out on how to set everything up I will see if i can dig it up.

On 1/5/2020 10:51 AM, peter bunge wrote:
So what is a SMU?

SMU Singapore Management University
SMU Southern Methodist University
SMU Saint Mary's University *(Halifax, Nova Scotia; Philippines)*
SMU Solid (Waste) Management Unit
SMU Saint Mary's University of Minnesota
SMU Sikkim Manipal University *(India)*
SMU Suomen Merimies-Unioni *(Finnish: Finnish Seamen's Union)*
SMU Sindicato Médico del Uruguay
SMU Storage Migrator for Unix
SMU Shanghai Maritime University *(Shanghia, China)*
SMU Santa Monica United *(soccer; California)*
SMU Swansea Metropolitan University *(UK)*
SMU Sekolah Menengah Umum *(Indonesian High school)*
SMU Special Management Unit
SMU Services Médicaux d'Urgence *(French: Emergency Medical Services)*
SMU Southern Mississippi University
SMU Special Mission Unit *(US DoD)*
SMU System Management Utility
SMU Smallest Mining Unit
SMU Start Me Up
SMU Southeastern Massachusetts University *(formerly used, now Umass)*
SMU Source Measurement Unit
SMU Storage Management Utility *(data storage)*
SMU Special Make Up
SMU Selective Mining Unit
SMU Sociedad Mexicana de Urología
SMU System Managed Undo *(Oracle Databases)*
SMU Sediment Management Unit
SMU Supply Management Unit
SMU Sassy Management Unit
SMU Small Marching Unit
SMU Switch Multiplexer Unit
SMU Secure Mobile Unit
SMU Service Meter Unit
SMU Scrutin Majoritaire Uninominal *(French: Single Member Plurality)*
SMU Service Management Unit
SMU Strategic Market Unit
SMU Switch Multiplex Unit
SMU Svenska Missionskyrkans Ungdomsförbund
*(Swedish Christian Youth Organisation)*
SMU Storage Management Unit
SMU Secours Médical d'Urgence
*(French: Emergency Medical Relief; various organizations)*
SMU Subscriber Module Urban
SMU Single-Word, Multiple-Bit Upset
SMU Software Maintenance Update *(Cisco)*
SMU Speaker/Microphone Unit *(US NASA)*
SMU System Master Unit
SMU Sindh Madressah University *(Karachi, Pakistan)*
SMU Shelter Management Unit *(US FEMA)*
SMU Space Management Utility
SMU Small and Medium-Sized Undertaking
SMU System Measurement Unit
SMU Simple Mail Users
SMU Space Self Maneuvering Unit
SMU Secours Mondial d'Urgence *(French: World Emergency Relief)*
SMU Super Module Unit
SMU Super Millionaire University
*(fictional, from TV show Gilligan's Island)*
SMU Smoke Me Up
SMU Safe Mode Utility
SMU Special Maintenance Unit *(India)*

On Sun, Jan 5, 2020 at 10:10 AM Eric <ericsp@...> wrote:

Is there a modern version of these curve tracers? From what I have seen
the 300 series seems to be about the top end. I know you can get the
same functionality today but you need 2 X $10,000 SMU's, and a computer,
and software so call it a $25,000 setup though given the catalog price
of the 576 and the 300's doesn't sound so bad now that I say it.


On 1/5/2020 6:59 AM, cnc_joker via Groups.Io wrote:
A long time ago in the early 80's the Massachusetts hams ran an auction
at Honeywell Inc
in Billerica. You could bring your old electronic stuff and they would
auction it off. It was
great fun and always well attended.

Anyway, one guy brought a 370 to be auctioned. As he wheeled it in on
a cart the crowd
chuckled. When it went up for auction it sold for $1 and the
auctioneer had a hard time
getting even that! Between then and now, what a great return on that
investment.
Pete.





Re: 465M Junker

tekscopegroup@...
 

On Fri, Jan 3, 2020 at 05:41 PM, KB6NAX wrote:
.... After fussing and fuming I
removed the shield from the ch 1 attenuator switch and spotted a possible
source of the problem. Some years ago I gave up on a 475 which had several
faulty attenuator plug-in modules. The 465M has two in each channel. I
worked them up and down in their sockets a few times and seemingly made a
reduction in the erratic behavior. But being a glutton for punishment I
wasn't going to give up yet. Just moving the scope around caused dramatic
changes in the chaos displayed on the CRT. And then suddenly it would stop,
I'd get nice noise free traces. Then it would start up again. ..........
I encountered a very similar problem on a 2213A, in which the attenuation modules are also plugin type and it has two on each channel. The levels where all over the place but sometimes things seemed to settle after unplugging and plugging the modules several times or wedge them with some foam squares against the metal top covers to immobilize etc. But then the problem would invariably always return in short order. It looked like a bad contact on the pins of the modules or that the contact fingers on the receiving board where perhaps stretched or loose. But in the end it turned out to be a cold solder joint at one of the pins right inside one of the attenuation modules. In the end opened all four modules and carefully reflowed the solder joints on the pins and all problems where gone for good. There where at least one or more really poor looking solder joints inside each module. The thread I opened about this is somewhere here among the group messages.


Re: Tektronix 570 Vacuum Tube Curve Tracer on eBay

 

Hi David,
It's not a rumor. It's a fact. I concur with Craig - the uTracer6 looks like it will meet the needs of almost everyone.

The current product, uTracer3, is an extremely impressive product and proof that this guy knows what he is doing. I thought this was brilliant when I first saw it 2 years ago. The only improvement I thought it needed was higher plate voltage and current and a greater range of grid voltage. It looks like that is the minimum improvement he is working on for the new version. I'm sure it will have other capabilities as well.

I'm not sure why he thinks there is a need for so much positive grid voltage but that is probably because he didn't realize there are OpAmps that can work off of asymmetric voltages. That would let him increase the negative grid voltage range by reducing the positive grid voltage range the same amount. For instance the -100V to +100V range for the control grid would make more sense if the range was -150V to +50V.

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of David Holland
Sent: Sunday, January 05, 2020 8:00 AM
Subject: Re: [TekScopes] Tektronix 570 Vacuum Tube Curve Tracer on eBay

But I'm not sure what the advantage of a 570 is over something like
the Utracer3+. If its voltage, I'll mention rumor has it, Ronald
is working on a v6 that'll do 1KV plate & screen....
David

-----Original Message-----
From: Craig Sawyers [mailto:c.sawyers@...]
Sent: Saturday, January 04, 2020 9:25 AM
To: @Dennis_Tillman_W7pF
Subject: FW: uTracer6 weblog online

The latest design intent from uTracer. Looks impressive!

Craig

From: Ronald Dekker [mailto:ronald@...]
Sent: 04 January 2020 13:50
To: c.sawyers@...
Subject: uTracer6 weblog online

uTracer6 weblog online

Dear uTracer friends,

Let me start by wishing you and everybody dear to you a great and above all healthy 2020!

The uTracer3 has been around for a number of years now and over time many people have asked me for higher voltages and higher currents. It is not so easy to come to a design that hits the sweet spot between performance on one hand and simplicity on the other hand. I think I am now on the right track for a well-balanced design, and I felt confident enough to start a web-log about it. The target specs for the uTracer6 are 1000V @ 1A for anode and screen, and a -100V to +100V range for the control grid. The coming months I will add chapters to the blog as the work progresses.

Once a year I ask people who have built a uTracer and who are satisfied with it to send me a few pictures and a few lines for my testimonial page. If you have not done so, please take a few minutes time to do so. it is highly appreciated!

warm regards,
Marie-José & Ronald



--
Dennis Tillman W7PF
TekScopes Moderator


Re: Tektronix 570 Vacuum Tube Curve Tracer on eBay

 

Many of you are not familiar with what the 570 is worth to a lot of people. His starting price is not out of line at all. If past auctions are any indication it will sell for over $5,000.

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of John Williams
Sent: Saturday, January 04, 2020 8:02 PM
To: TekScopes@groups.io
Subject: [TekScopes] Tektronix 570 Vacuum Tube Curve Tracer on eBay

https://www.ebay.com/itm/Tektronix-570-Vacuum-Tube-Curve-Tracer-w-manual/333465990412?hash=item4da41f350c:g:~hMAAOSwpj1eETIK






--
Dennis Tillman W7PF
TekScopes Moderator


Re: Tektronix 570 Vacuum Tube Curve Tracer on eBay

John Griessen
 

On 1/5/20 9:51 AM, peter bunge wrote:
SMU Source Measurement Unit
probably, maybe not... :-)


Re: Tektronix 570 Vacuum Tube Curve Tracer on eBay

David Holland
 

You forgot "Sucks More than Usual" :-)

But I'm not sure what the advantage of a 570 is over something like
the Utracer3+. If its voltage, I'll mention rumor has it, Ronald
is working on a v6 that'll do 1KV plate & screen....

(Not that I'd ignore a 570 if I found it lying by the side of the road
mind you...)

David

On Sun, Jan 5, 2020 at 10:52 AM peter bunge <bunge.pjp@...> wrote:

So what is a SMU?

SMU Singapore Management University
SMU Southern Methodist University
SMU Saint Mary's University *(Halifax, Nova Scotia; Philippines)*
SMU Solid (Waste) Management Unit
SMU Saint Mary's University of Minnesota
SMU Sikkim Manipal University *(India)*
SMU Suomen Merimies-Unioni *(Finnish: Finnish Seamen's Union)*
SMU Sindicato Médico del Uruguay
SMU Storage Migrator for Unix
SMU Shanghai Maritime University *(Shanghia, China)*
SMU Santa Monica United *(soccer; California)*
SMU Swansea Metropolitan University *(UK)*
SMU Sekolah Menengah Umum *(Indonesian High school)*
SMU Special Management Unit
SMU Services Médicaux d'Urgence *(French: Emergency Medical Services)*
SMU Southern Mississippi University
SMU Special Mission Unit *(US DoD)*
SMU System Management Utility
SMU Smallest Mining Unit
SMU Start Me Up
SMU Southeastern Massachusetts University *(formerly used, now Umass)*
SMU Source Measurement Unit
SMU Storage Management Utility *(data storage)*
SMU Special Make Up
SMU Selective Mining Unit
SMU Sociedad Mexicana de Urología
SMU System Managed Undo *(Oracle Databases)*
SMU Sediment Management Unit
SMU Supply Management Unit
SMU Sassy Management Unit
SMU Small Marching Unit
SMU Switch Multiplexer Unit
SMU Secure Mobile Unit
SMU Service Meter Unit
SMU Scrutin Majoritaire Uninominal *(French: Single Member Plurality)*
SMU Service Management Unit
SMU Strategic Market Unit
SMU Switch Multiplex Unit
SMU Svenska Missionskyrkans Ungdomsförbund
*(Swedish Christian Youth Organisation)*
SMU Storage Management Unit
SMU Secours Médical d'Urgence
*(French: Emergency Medical Relief; various organizations)*
SMU Subscriber Module Urban
SMU Single-Word, Multiple-Bit Upset
SMU Software Maintenance Update *(Cisco)*
SMU Speaker/Microphone Unit *(US NASA)*
SMU System Master Unit
SMU Sindh Madressah University *(Karachi, Pakistan)*
SMU Shelter Management Unit *(US FEMA)*
SMU Space Management Utility
SMU Small and Medium-Sized Undertaking
SMU System Measurement Unit
SMU Simple Mail Users
SMU Space Self Maneuvering Unit
SMU Secours Mondial d'Urgence *(French: World Emergency Relief)*
SMU Super Module Unit
SMU Super Millionaire University
*(fictional, from TV show Gilligan's Island)*
SMU Smoke Me Up
SMU Safe Mode Utility
SMU Special Maintenance Unit *(India)*

On Sun, Jan 5, 2020 at 10:10 AM Eric <ericsp@...> wrote:

Is there a modern version of these curve tracers? From what I have seen
the 300 series seems to be about the top end. I know you can get the
same functionality today but you need 2 X $10,000 SMU's, and a computer,
and software so call it a $25,000 setup though given the catalog price
of the 576 and the 300's doesn't sound so bad now that I say it.


On 1/5/2020 6:59 AM, cnc_joker via Groups.Io wrote:
A long time ago in the early 80's the Massachusetts hams ran an auction
at Honeywell Inc
in Billerica. You could bring your old electronic stuff and they would
auction it off. It was
great fun and always well attended.

Anyway, one guy brought a 370 to be auctioned. As he wheeled it in on
a cart the crowd
chuckled. When it went up for auction it sold for $1 and the
auctioneer had a hard time
getting even that! Between then and now, what a great return on that
investment.

Pete.







Re: Tektronix 570 Vacuum Tube Curve Tracer on eBay

peter bunge
 

So what is a SMU?

SMU Singapore Management University
SMU Southern Methodist University
SMU Saint Mary's University *(Halifax, Nova Scotia; Philippines)*
SMU Solid (Waste) Management Unit
SMU Saint Mary's University of Minnesota
SMU Sikkim Manipal University *(India)*
SMU Suomen Merimies-Unioni *(Finnish: Finnish Seamen's Union)*
SMU Sindicato Médico del Uruguay
SMU Storage Migrator for Unix
SMU Shanghai Maritime University *(Shanghia, China)*
SMU Santa Monica United *(soccer; California)*
SMU Swansea Metropolitan University *(UK)*
SMU Sekolah Menengah Umum *(Indonesian High school)*
SMU Special Management Unit
SMU Services Médicaux d'Urgence *(French: Emergency Medical Services)*
SMU Southern Mississippi University
SMU Special Mission Unit *(US DoD)*
SMU System Management Utility
SMU Smallest Mining Unit
SMU Start Me Up
SMU Southeastern Massachusetts University *(formerly used, now Umass)*
SMU Source Measurement Unit
SMU Storage Management Utility *(data storage)*
SMU Special Make Up
SMU Selective Mining Unit
SMU Sociedad Mexicana de Urología
SMU System Managed Undo *(Oracle Databases)*
SMU Sediment Management Unit
SMU Supply Management Unit
SMU Sassy Management Unit
SMU Small Marching Unit
SMU Switch Multiplexer Unit
SMU Secure Mobile Unit
SMU Service Meter Unit
SMU Scrutin Majoritaire Uninominal *(French: Single Member Plurality)*
SMU Service Management Unit
SMU Strategic Market Unit
SMU Switch Multiplex Unit
SMU Svenska Missionskyrkans Ungdomsförbund
*(Swedish Christian Youth Organisation)*
SMU Storage Management Unit
SMU Secours Médical d'Urgence
*(French: Emergency Medical Relief; various organizations)*
SMU Subscriber Module Urban
SMU Single-Word, Multiple-Bit Upset
SMU Software Maintenance Update *(Cisco)*
SMU Speaker/Microphone Unit *(US NASA)*
SMU System Master Unit
SMU Sindh Madressah University *(Karachi, Pakistan)*
SMU Shelter Management Unit *(US FEMA)*
SMU Space Management Utility
SMU Small and Medium-Sized Undertaking
SMU System Measurement Unit
SMU Simple Mail Users
SMU Space Self Maneuvering Unit
SMU Secours Mondial d'Urgence *(French: World Emergency Relief)*
SMU Super Module Unit
SMU Super Millionaire University
*(fictional, from TV show Gilligan's Island)*
SMU Smoke Me Up
SMU Safe Mode Utility
SMU Special Maintenance Unit *(India)*

On Sun, Jan 5, 2020 at 10:10 AM Eric <ericsp@...> wrote:

Is there a modern version of these curve tracers? From what I have seen
the 300 series seems to be about the top end. I know you can get the
same functionality today but you need 2 X $10,000 SMU's, and a computer,
and software so call it a $25,000 setup though given the catalog price
of the 576 and the 300's doesn't sound so bad now that I say it.


On 1/5/2020 6:59 AM, cnc_joker via Groups.Io wrote:
A long time ago in the early 80's the Massachusetts hams ran an auction
at Honeywell Inc
in Billerica. You could bring your old electronic stuff and they would
auction it off. It was
great fun and always well attended.

Anyway, one guy brought a 370 to be auctioned. As he wheeled it in on
a cart the crowd
chuckled. When it went up for auction it sold for $1 and the
auctioneer had a hard time
getting even that! Between then and now, what a great return on that
investment.

Pete.






Re: Logic families

Glenn Little
 

I was a Navigation Electronics Tech on Poseidon class submarines.
We used a navigation computer  built by UNIVAC in 1967, the CP-890/UYK.
This computer used DTL flat pack logic.
The computer was still in use through the late 1990's.
The reason for the long life was reliability.
We might have one failure between three computers in a 90 day period.

So DTL was still in use through the late 1990's.

Glenn Little ETCS(SS) USN Retired


On 1/5/2020 8:41 AM, Dale H. Cook wrote:
On 1/5/2020 12:13 AM, KB6NAX wrote:

RTL and DTL are obsolete, too slow, too few functions, too power hungry, no longer made.  Look up ancient data sheets.
There is still specialized equipment in use that was built with RTL -  I have a customer with one example.
-- h
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"


Re: Tektronix 570 Vacuum Tube Curve Tracer on eBay

Dave Daniel
 

I have been looking at sales of Tektronix 570s, mostly but not all on ebay, for a long time now. All of then have had an asking price of around $4k.

DaveD

Sent from a small flat thingy

On Jan 5, 2020, at 09:45, Eric <ericsp@...> wrote:

I would love to have a 570 in the lab but not for that that is nuts.


On 1/5/2020 9:36 AM, Mlynch001 wrote:
On Sat, Jan 4, 2020 at 10:48 PM, Dan Cordova wrote:

For less than $200, I put together a Dennis Tillman VTCT board, and modified
my Hickok Tube Tester to use with my Tektronix 575 curve tracer. I also made
the Daniel Schoo designed triode and pentode adapters for the Tektronix 576
Curve Tracer at work.
I'm also not sure all my tubes and stereo gear are worth ~$4000 all together.
;)
I KNOW my stereo gear is not worth that much! I have the stuff to build Dennis Tillman's VTCT and I have a 576 as well. So even after I buy a suitable tube tester, I am sure that all told I would have less than $1000 in the whole thing. It might not do what the 570 will do, but likely 95% as much and still test solid state devices as well. You would need to have a serious desire or even more serious need for this thing in order to justify paying that price. From the description, it sounds as though this thing is not quite ready to go as it is. The elephant in the room is getting it shipped to ones location without it being destroyed in the process. The seller does have a "Make an Offer" option as well. This will be interesting to watch.




Re: Logic families

Lawrance A. Schneider
 

Thank you Arden! I learned a lot by reading it.

Mr. Lynch, you wrote: I have an older TI Logic Cross reference that crosses over many of the older Logic IC’s.

Could you post it?

Thank you, larry


Re: Tektronix 570 Vacuum Tube Curve Tracer on eBay

Eric
 

Is there a modern version of these curve tracers? From what I have seen the 300 series seems to be about the top end. I know you can get the same functionality today but you need 2 X $10,000 SMU's, and a computer, and software so call it a $25,000 setup though given the catalog price of the 576 and the 300's doesn't sound so bad now that I say it.

On 1/5/2020 6:59 AM, cnc_joker via Groups.Io wrote:
A long time ago in the early 80's the Massachusetts hams ran an auction at Honeywell Inc
in Billerica. You could bring your old electronic stuff and they would auction it off. It was
great fun and always well attended.

Anyway, one guy brought a 370 to be auctioned. As he wheeled it in on a cart the crowd
chuckled. When it went up for auction it sold for $1 and the auctioneer had a hard time
getting even that! Between then and now, what a great return on that investment.

Pete.


Re: Sony/Tek 318 Logic Analyser - parts needed

Peter_G0RSQ
 

On Sat, Jan 4, 2020 at 04:21 PM, Gala Dragos wrote:


Sony/Tektronix 318
I have fully working one (no probes) in UK.

peter at g0rsq dot co dot uk


Re: Trying to bring back a AA501

Eric
 

I did find out that the AA501 does need the VCC of 15V so the HC series logic is out for sure. I am going to order some of the direct replacement parts as there is a supply house that has then mouser and digikey were out. Texas Instrument cross reference says a CD40175BE is a comparable part as well. I have also confirmed the fault as with this IC out of circuit the 501 says 100+% distortion on all frequencies also one of the outputs is open when i check it with my small curve tracer. On this one pin 14 is dead.

On 1/5/2020 1:08 AM, KeepIt SimpleStupid via Groups.Io wrote:
My GOTO place has it: http://www.utsource.net/sch/MM74C175N
On Saturday, January 4, 2020, 10:31:47 PM EST, Mlynch001 <@mlynch001> wrote:
OK, learned something.  LSTTL and TTL are different animals?  SN74HC175N Will drive 10 outputs of LSTTL.    Just trying to learn how logic works, I will likely encounter a similar issue in the future.

Thanks!


Re: Logic families

peter bunge
 

You can make an Op Amp with a 914 RTL. They were fun to play with and I
have a couple. I am looking for a 923 flip-flop out of nostalgia but my
interest does not amount to $20+ being asked (with another $20 shipping to
Canada). I have a large selection of old logic chips if anyone has a
specific need.

On Sun, Jan 5, 2020 at 12:15 AM KB6NAX <gumbear@...> wrote:

RTL and DTL are obsolete, too slow, too few functions, too power hungry,
no
longer made. Look up ancient data sheets.

Arden

-----Original Message-----
From: Dean Davidson via Groups.Io
Sent: Saturday, January 04, 2020 8:05 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Logic families



On 5/01/2020 13:58, KB6NAX wrote:
Here's a comprehensive overview of the various logic families (long URL):

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=19&cad=rja&uact=8&ved=2ahUKEwjBrqSQuevmAhVoB50JHRjTC4MQFjASegQIBxAC&url=http%3A%2F%2Fwww.ti.com%2Flit%2Fsdyu001&usg=AOvVaw25lGF9wfK6uX4gPjvyvJpf

No that very comprehensive. What about DTL & RTL???
Dean







Re: Tektronix 570 Vacuum Tube Curve Tracer on eBay

Eric
 

I would love to have a 570 in the lab but not for that that is nuts.

On 1/5/2020 9:36 AM, Mlynch001 wrote:
On Sat, Jan 4, 2020 at 10:48 PM, Dan Cordova wrote:

For less than $200, I put together a Dennis Tillman VTCT board, and modified
my Hickok Tube Tester to use with my Tektronix 575 curve tracer.  I also made
the Daniel Schoo designed triode and pentode adapters for the Tektronix 576
Curve Tracer at work.
I'm also not sure all my tubes and stereo gear are worth ~$4000 all together.
   ;)
I KNOW my stereo gear is not worth that much! I have the stuff to build Dennis Tillman's VTCT and I have a 576 as well. So even after I buy a suitable tube tester, I am sure that all told I would have less than $1000 in the whole thing. It might not do what the 570 will do, but likely 95% as much and still test solid state devices as well. You would need to have a serious desire or even more serious need for this thing in order to justify paying that price. From the description, it sounds as though this thing is not quite ready to go as it is. The elephant in the room is getting it shipped to ones location without it being destroyed in the process. The seller does have a "Make an Offer" option as well. This will be interesting to watch.