¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io
Date

FS: Tektronix TDS2024 Oscilloscope

 

Hello All,

I have for sale a Tektronix TDS2024 200 MHz, 4 channel, oscilloscope.? It passes all self tests and self calibration and has a good display.? There some staining on the top of the case where it looks like someone used a solvent to remove a sticker.?? It does include a TDS2CMax communication module.? It does not include probes or other accessories.?? I cannot guarantee the calibration on this so I am selling it AS-IS.? The price is $375 plus shipping.? Located in Maryland USA.

Tom Bryan
N3AJA


Re: 2465B all OPT, power supply reassembly: Cables?

 

Egge, many thanks I have just found that manual.

Will search deeper.

Still any photos of the arrangement of PSU, HPIB, option board ion a fully optioned unit will be helpful,


Kind Regards,

Jon


Re: I built a TM500 mainframe tester, and updated the design. Someone might find this useful?

 

Instead of a latch, I used a small cabinet pull for the module extender I built. I don't see a need for latches for anything short of California's "big one".

John

On 1/10/2021 9:06 AM, Harvey White wrote:
I agree, latches are different.? What I was thinking of is that the extrusions for the 7000 series, if worked upon, could be used.? I'm assuming that the extrusions are the difficult part, and if the latch is not important, it may be left out.
Harvey
On 1/10/2021 10:58 AM, magnustoelle via groups.io wrote:
Good day,
may I correct you here, Harvey; the TM500/5000 use?the same mech design as used in the?Tektronix 5000 Series of oscilloscopes, not the 7000 series. ?We have had?a few related discussions earlier.
Jared, I wanted to congratulate you on your design and the time and effort that went into this! ????Particularly impressed by?the mechanical design, i.e.?how nicely the front panel mounted components fit etc.?I have searched for the 3D CAD software you used and it?seems you are using Rhinoceros, which aims the?professional designer community... That would explain a lot...
Cheers,
Magnus


Am Sonntag, Januar 10, 2021, 16:47 schrieb Harvey White <madyn@...>:

If you have some machining capability, or leave out the latch, you might
be able to use the rails from a dead 7000 series scope plugin.? The
extrusions seem to be the same size, width wise. They are, of course,
longer and have a different latch mechanism.

Might be useful to check.

Harvey


On 1/10/2021 3:41 AM, momemeca wrote:
Hello Larry,
Thank you for confirming and offering to add me to the list ?
Estimated costs are ok ?
My details as follows:
Rick LE GUEN
12 Bayvista Rise
Somerville
Victoria 3912
Australia (not Austria ?)C

Since I did not read the very original message of this post, can you please
clarify/confirm that the scope of supply is for PCBs only or other?
BOM included?
I am currently looking for an empty or U/S TM-500 module or a series 5000
module.? Please let me know if you have or know where I could get one (I do
know that they¡¯re like chicken teeth ATM) ?

Cheers,
Rick.

On Sun, 10 Jan 2021 at 09:51, Larry McDavid <lmcdavid@...> wrote:

Rick, I need your full name to proceed. I can still add you to the list
of purchasers but you need to be aware postage by First Class Package to
Australia will be? US$27.75 plus US$5 for packaging. I'm reasonably
confident the board set will be priced at US$38.

This will be a flat package, not a box (which costs lots more), and
there will be a stiffener to prevent bending.

Larry


On 1/9/2021 5:30 AM, momemeca wrote:
Hello Larry,
I hope that I am not too late in requesting a complete board set for the
TM500 Mainframe Tester.
If at all possible, please include me to the list and advise of the
total cost including shipping to Somerville Post Code 3912, Victoria,
Australia.
Cheers,

Rick.

On 4 Jan 2021, at 17:39, Larry McDavid <lmcdavid@...> wrote:

Here is another update list of those wanting the TM500 tester board
set, with additions and minor changes. Please check this list carefully for
inclusion of your name in the two groups.
ML
PA
SM
DC
HB
GL
MH
JR
WR
JT
EW
RD
AW
SG
DS
JF
MU
PE
SN
SC
AA
BH
EPa
WS
KT
RDD
PM
GM
CC
BH
BK
LR
MP
MP
SA
BG
JK
LM


In addition to those above, the following have indicated an interest
but there is some issue that must be resolved before you can be included in
the order:
AA
PD
BO
CH
EP

--
Best wishes,

Larry McDavid W6FUB
Anaheim, California? (SE of Los Angeles, near Disneyland)





--
Best wishes,

Larry McDavid W6FUB
Anaheim, California? (SE of Los Angeles, near Disneyland)



















Re: SC-502 transistor

 

Check HV windings and HV cap.

Both subject to failures, so shorting inverter load

See service manual for the operation and frequency of HV section.

Jon


Re: SC-502 transistor

 

I had a similar thing with a 2235 once.
I did a ringing test that showed me the transformer was bad.

Google "ringing test transformer" and you will find info.

Basically it's very simple to do:

Use a low repeat rate fast rise square wave generator and apply this pulse to the primary winding, this can be done in circuit.

Use a scope to look at one of the secondary windings, you should see the ringing being damped out slowly and nicely.
If it damps out in only 2-3 cycles, the transformer has a short.

Good luck,

Leo


Re: SC-502 transistor

 

If you do a little search, I repaired a SC-502 a few months back. I¡¯ll have to go through my notes, but I do remember something about Q555. Don¡¯t give up, they are very nice and handy little scopes.


Re: SC-502 transistor

 

The final outcome is negative. Fried Q855 twice, The HV supply won't oscillate and draws a lot of current that
quickly destroys Q855. I give up.
RIP SC502

Giovanni IZ5PQT


Re: 2465B all OPT, power supply reassembly: Cables?

 

Hi Jean-Paul,

See 24X5B/2467B Options Service Manual (070-6864-02 for SN B050000 and Above). Pdf pages 369,370 and 371. Notch (1) is where a Triangle/Arrow is marked on the Board.

Succes,

Egge Siert


Re: Tek 576 step generator problem

 

It looks like a "broken trace " issue to me.
Please ref to my 577 repair log:
</g/TekScopes/topic/tek_577_d1_repair_b07xxxx/77914568?p=,,,100,0,0,0::recentpostdate%2Fsticky,,,100,2,0,77914568>

Please check the waveform of the staircase if you have a scope.

Jack


Re: I built a TM500 mainframe tester, and updated the design. Someone might find this useful?

 

Hello Larry,
I would like to check, once more, that I am definitely included as I do not (explicitly) see my initials on your latest list.
Given my French name in two words, my initials should be "RLG" and not "RG" or "RL").
Please confirm, and (possibly) amend.

Cheers,

Rick (from AUS).

On 11 Jan 2021, at 09:32, Larry McDavid <lmcdavid@...> wrote:

This is another update on the group order for circuit board sets for Jared Cabot's TM500 power supply tester.

I just yesterday remembered there is a Tek500 groups.io Group specifically for TM500 equipment. I asked there for interest in the board sets and got several requests to be included; that has expanded the list to 63 committed and still 2 more with incomplete information or lack of commitment. Please check the two lists of name initials below to ensure you are shown correctly.

These 63 have committed to order board sets:
ML
ML
ML
PA
SM
DC
HB
GL
MH
JR
WR
JT
EW
EW
EW
EW
RD
AW
SG
DS
JF
MU
PE
SN
SC
AA
BH
EPa
WS
KT
RDD
PM
GM
CC
BH
BK
LR
MP
MP
MP
SA
BG
JK
AA
PTC
PD
MU
BO
JG
EP
BL
CT
MD
RG
CB
CH
DM
AD
JR
JR
CR
PM
LM

These 2 are not committed at this time:
rrrr
MK

It is interesting that, while most of these are in USA, there are also members in UK, Canada, Australia, Spain and Germany.

In light of the size of the circuit board order remember that I must ask for prepayment by PayPal Friends and Family before I can place the board order. If you have any problem using PayPal Friends and Family as a means of payment, please contact me off-list.

Final board set cost is still being worked but the estimate is $38. Packaging and shipment to CUSA will be $10; international shipping will be higher and I have discussed that with those several.

Note that Jared has released another update to the Gerber files.

Larry McDavid


On 12/31/2020 11:27 AM, Jared Cabot via groups.io wrote:
Hi all,
I have been accumulating TM500 modules and mainframes for a little while, so I recently finished building an 067-1201-99 TM500 mainframe tester from the Tek construction notes floating around.
I updated the design somewhat and designed it for simplified construction (Not a single wire to strip and solder!) and I thought someone here might be interested in taking a look or even building one themselves.
Here's a link to the youtube video:

And here's a link to the google drive with all the gerbers and schematics and stuff. I went so far as to rewrite the manual with the alterations and corrections included.
...
--
Best wishes,

Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)





Re: [dead tek 485] Can i fix it ? (newbie here)

 

Jeff,
According to the 1976 Tek catalog, the recommended probes for 50 ohm mode were P6056 (10x), P6057 (100x), and P6201 (FET). The P6202A (FET) would also be fine. For 1M ohm input, the recommended probes were P6053B (10x) and P6063A (1x/10x). Bandwidths varied. The 485 has power connectors for the FET probes.
You can download the catalog from:


--John Gord

On Sun, Jan 10, 2021 at 08:39 PM, Jeff Dutky wrote:


Tom,

I've been reading everything that I could find about the 485 since this
discussion started, and the one thing that I can't find is any mention of what
probe would have been standard with the scope. The 485 was released the same
year as the 475 (with which I am quite familiar). The 475 would have shipped
with P6075 probes (or maybe P6063 probes? My father's scope, which he started
using in 1975, was shipped with P6075A probes).

The manuals for the 475 clearly list what kind of probe would have been
standard equipment with (and, apparently, were specifically designed for) the
scope. Depending on which manual you look at the 475 manuals list either the
P6075 or the P6106, but I haven't found any such listing in the 485's manual.

I've been using cheap Chinese 200 MHz probes to test my new (to me) 2465, and
the effects of the probes' bandwidth are evident. What probes would have been
used on a new 485 in the early to mid seventies?

-- Jeff Dutky


Re: [dead tek 485] Can i fix it ? (newbie here)

 

Hi, Jeff,

The manual I have lists several probes on page 1-3, with the P6053 being the only 10:1, 1 megohm probe mentioned. The P6106 was (and is) commonly found connected to the 485, too, though. In the 1 meg mode, the bandwidths of the 485 and 475 are both around 250MHz with either of those probes, as long as they're 2m or less in length.

And yes, the el cheapo Chinese probes often found on eBay are pretty rough at 200MHz (you can already see significant pulse response aberrations at 100MHz). The ones I've disassembled don't use resistance wire at all -- just something resembling ordinary RG-174 and a couple of damping resistors. I was actually impressed that they worked as well as they did, but that's only because my expectations were even lower.

-- Cheers,
Tom

--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070

On 1/10/2021 20:39, Jeff Dutky wrote:
Tom,

I've been reading everything that I could find about the 485 since this discussion started, and the one thing that I can't find is any mention of what probe would have been standard with the scope. The 485 was released the same year as the 475 (with which I am quite familiar). The 475 would have shipped with P6075 probes (or maybe P6063 probes? My father's scope, which he started using in 1975, was shipped with P6075A probes).

The manuals for the 475 clearly list what kind of probe would have been standard equipment with (and, apparently, were specifically designed for) the scope. Depending on which manual you look at the 475 manuals list either the P6075 or the P6106, but I haven't found any such listing in the 485's manual.

I've been using cheap Chinese 200 MHz probes to test my new (to me) 2465, and the effects of the probes' bandwidth are evident. What probes would have been used on a new 485 in the early to mid seventies?

-- Jeff Dutky




Re: Update on Domestic US Book Delivery Dates

 

Sorry to disagree with all the naysayers but from the emails I have received so far the books are arriving ON or AHEAD of the estimated dates on the receipt I got from the post office.

I don't expect every one of the 76 books to arrive by Monday evening but I would not be surprised if at least 85% to 90% of them arrive with the remaining 6 to 10 books arriving a day or two later.

I predicted they would all arrive 10 days after I shipped them on 1/2/2021. That gives me until Tuesday evening for the last one to arrive. It will be close but I think my chances are better than 50/50 that they will all arrive by then.

If I focused on all the things that could go wrong including, as you suggested the USPS being unable to process the deliveries, I never would have called Peter Keller in the first place. I do not know whether the USPS will be able to deliver every book exactly when they say they will after having so many of their sorting machines destroyed this summer to intentionally slow down the mail. From what I can tell so far I would say they are doing an excellent job delivering the least important, lowest class media mail books, I entrusted to them.

I don't know about you but I am very impressed with the job the United States Postal System is doing delivering Peter's books to you everywhere in the United States.

Dennis Tillman W7pF

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Gordon Smith
Sent: Friday, January 08, 2021 5:37 PM
To: [email protected]
Subject: Re: [TekScopes] Update on Domestic US Book Delivery Dates

On Fri, Jan 8, 2021 at 02:45 PM, Dennis Tillman W7pF wrote:


I just discovered the printed receipt I received from the post office
last week (when I mailed Peter Keller's books to US addresses)
contains Estimated Delivery Dates. It estimates that ALL of the books
will be delivered to you by this Monday 1/11 at the latest.

Books to Florida addresses will arrive on Monday which I can
understand since they are the furthest from Seattle.

Books to New York State and New England addresses will arrive on
Monday although one book already arrived at Zip Code 06851 in
Connecticut yesterday, 1/7.

Dennis Tillman W7pF
Hi Dennis,
My apologies, but I would take any estimated delivery dates by the Post Office with a grain of salt. Because of changes made to the US Postal service over the last year, mail delivery is lagging massively. It is so bad that I personally know of Priority mail items that were mailed 2 weeks before Christmas and some are just now getting to their recipients. I ordered two aluminum roll up shade aluminum tubes last week and the business flat out stated that they would NOT ship via USPS because of delivery issues. YMMV but just thought I would give a warning.

Thank You, Gordon







--
Dennis Tillman W7pF
TekScopes Moderator


Re: [dead tek 485] Can i fix it ? (newbie here)

 

Tom,

I've been reading everything that I could find about the 485 since this discussion started, and the one thing that I can't find is any mention of what probe would have been standard with the scope. The 485 was released the same year as the 475 (with which I am quite familiar). The 475 would have shipped with P6075 probes (or maybe P6063 probes? My father's scope, which he started using in 1975, was shipped with P6075A probes).

The manuals for the 475 clearly list what kind of probe would have been standard equipment with (and, apparently, were specifically designed for) the scope. Depending on which manual you look at the 475 manuals list either the P6075 or the P6106, but I haven't found any such listing in the 485's manual.

I've been using cheap Chinese 200 MHz probes to test my new (to me) 2465, and the effects of the probes' bandwidth are evident. What probes would have been used on a new 485 in the early to mid seventies?

-- Jeff Dutky


Re: Tracking your Peter Keller book (and anything else) Internationally

 

We Aussies can track it in via the Australia post tracking system starting from the US tracking number.


Tracking your Peter Keller book (and anything else) Internationally

 

This web application called Package Radar may be helpful in tracking your
book.
This is the specific web page to track a USPS (US Postal Service) shipment:


Package Radar has 230 other worldwide carriers they track. You may find a
few of them useful as well.
The complete list of 230 carriers they track is here:


Dennis Tillman W7pF


Re: Tek 2712 GPIB board

 

One way to check is use a terminal program to connect to the prologix controller and try talking to the 2712. Sending the command ?ID should give you the model number and a bunch of other info.

Vince.

On 01/10/2021 03:02 PM, Howard Hoyt wrote:
Hi!
Does anyone have a spare 2712 GPIB board available? I am using a Prologic GPIB to USB converter, and the setup had been working great for a few years. Abruptly it ceased communicating, so I tried a spare Prologic converter, but that did not fix the issue. At that point I assumed a power issue with chassis differential (power spike?) between the PC and 2713 was the culprit. I replaced the two GPIB interface ICs U170 and U370 as well as the dead battery, but I still cannot plot through it. When Plot is pressed I get a No Listener message, even though the PC sees the Proligic, and I know it is good, so I suspect some other GPIB board issue.

I tried ordering a TMS9914A GPIB IC, but the only version available is a really small SMD (I forget the case outline style) which is not pin-for-pin compatible with the much larger one on my board and I don't have time to make an adapter PCB....if that is even the problem I hope someone has a spare board #671-1859-01 to sell?
Thank you for the bandwidth,
Howard Hoyt



--
K8ZW


Tek 2712 GPIB board

 

Hi!
Does anyone have a spare 2712 GPIB board available? I am using a Prologic GPIB to USB converter, and the setup had been working great for a few years. Abruptly it ceased communicating, so I tried a spare Prologic converter, but that did not fix the issue. At that point I assumed a power issue with chassis differential (power spike?) between the PC and 2713 was the culprit. I replaced the two GPIB interface ICs U170 and U370 as well as the dead battery, but I still cannot plot through it. When Plot is pressed I get a No Listener message, even though the PC sees the Proligic, and I know it is good, so I suspect some other GPIB board issue.

I tried ordering a TMS9914A GPIB IC, but the only version available is a really small SMD (I forget the case outline style) which is not pin-for-pin compatible with the much larger one on my board and I don't have time to make an adapter PCB....if that is even the problem I hope someone has a spare board #671-1859-01 to sell?
Thank you for the bandwidth,
Howard Hoyt


Re: [dead tek 485] Can i fix it ? (newbie here)

 

Hi Gary,

Jim was very good about citing references. His remarkable AN-47 (how many 132-page app notes do you run across?), where he debuted his pulser, cites the Tek 111 pre-trigger pulse gen as an inspiration. Unfortunately, he sort of misapplies the rise time-bandwidth relationship in the notes, leading readers to think that they could infer bandwidth from a narrow pulse's rise time using the same formula as for a step.

I'm sure that the application for which you built your avalanchers at GE had, er, other purposes.

-- Cheers,
Tom

--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070

On 1/10/2021 16:45, shalopt via groups.io wrote:
Don't known where Jim got the idea for the pulser but in 1962
I built this circuit with the delay line as an engineering technician.
While at GE Comm Products Lynchburg, Va Military Engineering
Dept long forgotten why we were doing this.
We where not testing "o" scope.
Gary G




Re: [dead tek 485] Can i fix it ? (newbie here)

 

Don't known where Jim got the idea for the pulser but in 1962
I built this circuit with the delay line as an engineering technician.
While at GE Comm Products Lynchburg, Va Military Engineering
Dept long forgotten why we were doing this.
We where not testing "o" scope.
Gary G