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Re: What calibration items to buy.

 

On Sat, 3 Mar 2018 19:16:42 -0000, you wrote:

Errm no. Those need a Pulse Head - no kit for that, and the SG5030 needs a
levelling head - sadly no kit for that either.
That (and price) is why I guess I don't have either. Oh well. Do
have the PG506 and TG601, as well as an SG502 and 503. The 504 has
eluded me.

Harvey



David


-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Harvey
White
Sent: 03 March 2018 18:46
To: [email protected]
Subject: Re: [TekScopes] What calibration items to buy.

On Sat, 03 Mar 2018 10:06:34 -0800, you wrote:

As far as I know, the PG506 calibration generator and SG504 leveled
sinewave generator would be the ideal choice. They're compact and serve
many of the purposes. The SG504 has a level output up to 1050Mhz while the
SG503 only goes to 250Mhz. I'm not sure what else may be out there that is
in the $500.00 USD or less range, but those are the units that I also want,
but don't actually need.

Without considering price in particular, you may want to check the
CG501 (TM500) and the CG5001 (TM5000). These combine the functions of the
PG506 and SG5xx series. However, they need a leveling head which is
typically missing. I think there might be a DIY version out there, though.

Any of the TM5000 series can be remote controlled, any of the TM500 is not
made to to be remoted. The remote control mechanism is HPIB/IEEE-488.

Harvey




I'm currently equipped with what is recommended by the 485 manual, but
those two plugins can handle the jobs of a shelf worth of the original
manual specified calibration gear, so I'd most definitely try to find those
plugins instead.

Also, my knowledge of calibration equipment doesn't extend beyond Tektronix
made gear, so there's most likely other options out there as well.

-Brian








Re: What calibration items to buy.

Richard Solomon
 

Also add the TG-501 Time Mark
Generator.

I have some of those and the TM-50n
Power Supplies for them. Someday I'll
get tired of looking at them and sell
off the whole lot.

73, Dick, W1KSZ

On Sat, Mar 3, 2018 at 11:06 AM, Brian Bloom via Groups.Io <
analogaddict013@...> wrote:

As far as I know, the PG506 calibration generator and SG504 leveled
sinewave generator would be the ideal choice. They're compact and serve
many of the purposes. The SG504 has a level output up to 1050Mhz while the
SG503 only
goes to 250Mhz. I'm not sure what else may be out there that is in the
$500.00 USD or less range, but those are the units that I also want, but
don't actually need.

I'm currently equipped with what is recommended by the 485 manual, but
those two plugins can handle the jobs of a shelf worth of the original
manual specified calibration gear, so I'd most definitely try to find those
plugins instead.

Also, my knowledge of calibration equipment doesn't extend beyond
Tektronix made gear, so there's most likely other options out there as well.

-Brian




Re: What calibration items to buy.

 

Yes, that is what I meant by ¡°build¡±

DaveD

Sent from a small flat thingy

On Mar 3, 2018, at 12:14, David C. Partridge <david.partridge@...> wrote:

Though you can make a levelling head... See:

< >

Cheers
Dave Partridge

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Dave Daniel
Sent: 03 March 2018 18:23
To: [email protected]
Subject: Re: [TekScopes] What calibration items to buy.

If you do buy an SG-540, make sure that it comes with the leveling head. If it doesn¡¯t, you¡¯ll have to buy or build one. The generator is not much use without the head.

DaveD

Sent from a small flat thingy

On Mar 3, 2018, at 11:06, Brian Bloom via Groups.Io <analogaddict013@...> wrote:

As far as I know, the PG506 calibration generator and SG504 leveled
sinewave generator would be the ideal choice. They're compact and serve many of the purposes. The SG504 has a level output up to 1050Mhz while the SG503 only goes to 250Mhz. I'm not sure what else may be out there that is in the $500.00 USD or less range, but those are the units that I also want, but don't actually need.

I'm currently equipped with what is recommended by the 485 manual, but those two plugins can handle the jobs of a shelf worth of the original manual specified calibration gear, so I'd most definitely try to find those plugins instead.

Also, my knowledge of calibration equipment doesn't extend beyond Tektronix made gear, so there's most likely other options out there as well.

-Brian







Re: What calibration items to buy.

 

Errm no. Those need a Pulse Head - no kit for that, and the SG5030 needs a
levelling head - sadly no kit for that either.

David

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Harvey
White
Sent: 03 March 2018 18:46
To: [email protected]
Subject: Re: [TekScopes] What calibration items to buy.

On Sat, 03 Mar 2018 10:06:34 -0800, you wrote:

As far as I know, the PG506 calibration generator and SG504 leveled
sinewave generator would be the ideal choice. They're compact and serve
many of the purposes. The SG504 has a level output up to 1050Mhz while the
SG503 only goes to 250Mhz. I'm not sure what else may be out there that is
in the $500.00 USD or less range, but those are the units that I also want,
but don't actually need.

Without considering price in particular, you may want to check the
CG501 (TM500) and the CG5001 (TM5000). These combine the functions of the
PG506 and SG5xx series. However, they need a leveling head which is
typically missing. I think there might be a DIY version out there, though.

Any of the TM5000 series can be remote controlled, any of the TM500 is not
made to to be remoted. The remote control mechanism is HPIB/IEEE-488.

Harvey




I'm currently equipped with what is recommended by the 485 manual, but
those two plugins can handle the jobs of a shelf worth of the original
manual specified calibration gear, so I'd most definitely try to find those
plugins instead.

Also, my knowledge of calibration equipment doesn't extend beyond Tektronix
made gear, so there's most likely other options out there as well.

-Brian



Re: What calibration items to buy.

 

Though you can make a levelling head... See:

< >

Cheers
Dave Partridge

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Dave Daniel
Sent: 03 March 2018 18:23
To: [email protected]
Subject: Re: [TekScopes] What calibration items to buy.

If you do buy an SG-540, make sure that it comes with the leveling head. If it doesn¡¯t, you¡¯ll have to buy or build one. The generator is not much use without the head.

DaveD

Sent from a small flat thingy

On Mar 3, 2018, at 11:06, Brian Bloom via Groups.Io <analogaddict013@...> wrote:

As far as I know, the PG506 calibration generator and SG504 leveled
sinewave generator would be the ideal choice. They're compact and serve many of the purposes. The SG504 has a level output up to 1050Mhz while the SG503 only goes to 250Mhz. I'm not sure what else may be out there that is in the $500.00 USD or less range, but those are the units that I also want, but don't actually need.

I'm currently equipped with what is recommended by the 485 manual, but those two plugins can handle the jobs of a shelf worth of the original manual specified calibration gear, so I'd most definitely try to find those plugins instead.

Also, my knowledge of calibration equipment doesn't extend beyond Tektronix made gear, so there's most likely other options out there as well.

-Brian



Re: 570 CRT technology.

 

Just noticed a previous wrinkle here, so I'll document it to avoid
confusing someone else when reading this thread in the future.

Even though the graticule has 10x10 divisions, the 1969 catalog tells that
each division measures 5/16 inches ~= 0.8 cm. Then, 10 divisions
corresponds to ~8 cm maximum (useful) vertical (D3/D4 plates) scan.
Also, explicitly stated as "providing 8 cm of linear vertical deflection"
in Tek's 1960 catalog.

So far, in the schematics I checked (from scopes using this CRT) the
chosen PDA voltage is 4 kV, though the maximum stated in the datasheet is
6 kV. So, maybe a conservative/derating design choice here.

Regarding the phosphor, the available datasheet is dated March 1958, so
other options out of P1, P2, P7, P11 were not available at the time.
P31 became the standard option some years later.

Therefore, there seem to be no problem with the 5CAP (former code for
T52P) CRT datasheet hosted in Frank's site.

Sebastian.

PS: I'm still interested in more technical details of this CRT w.r.t. std.
contemporary scope tubes. Any comment/pointer will be greatly
appreciated.

On Mon, February 19, 2018 2:48 pm, Sebastian Garcia wrote:
I thought linearity is good in the extremes of the 10x10 useful area of
the 570, achieved by trading off other CRT parameters not required for a
CT equipment (but usually required for a scope).

Of course, I may be wrong; would like to know more about this noticeable
difference between the CT tubes and contemporary scope tubes, with maximum
vertical scan typically being 6 cm.

Yet another discrepancy is the acceleration voltage: 4kV mentioned in
descriptions like Keller's article, and 6kV in this datasheet.
The 570 schematics shows 4kV.
This datasheet also lacks all the phosphor options we see in previously
mentioned websites (including P31, the standard for the '570).

Sebastian.


Chuck Harris wrote:
It could be as simple as the linear viewing area is 8x10cm,
and the outer 1cm are a touch nonlinear, but still can be viewed.

-Chuck Harris

Sebastian Garcia wrote:
In fact I see that VintageTek site is hosting Keller's article "Tek
CRT
History".



There (part 3) it confirms that the type 570 CT uses a T52 CRT, also
coded
as 5CAP.

Still, the available 5CAP1 datasheet is about a CRT with 8 cm useful
vertical scan.

Any comment will be appreciated, as I may be missing something.

Sebastian.







Re: What calibration items to buy.

 

On Sat, 03 Mar 2018 10:06:34 -0800, you wrote:

As far as I know, the PG506 calibration generator and SG504 leveled sinewave generator would be the ideal choice. They're compact and serve many of the purposes. The SG504 has a level output up to 1050Mhz while the SG503 only
goes to 250Mhz. I'm not sure what else may be out there that is in the $500.00 USD or less range, but those are the units that I also want, but don't actually need.
Without considering price in particular, you may want to check the
CG501 (TM500) and the CG5001 (TM5000). These combine the functions of
the PG506 and SG5xx series. However, they need a leveling head which
is typically missing. I think there might be a DIY version out there,
though.

Any of the TM5000 series can be remote controlled, any of the TM500 is
not made to to be remoted. The remote control mechanism is
HPIB/IEEE-488.

Harvey




I'm currently equipped with what is recommended by the 485 manual, but those two plugins can handle the jobs of a shelf worth of the original manual specified calibration gear, so I'd most definitely try to find those plugins instead.

Also, my knowledge of calibration equipment doesn't extend beyond Tektronix made gear, so there's most likely other options out there as well.

-Brian



Re: What calibration items to buy.

 

If you do buy an SG-540, make sure that it comes with the leveling head. If it doesn¡¯t, you¡¯ll have to buy or build one. The generator is not much use without the head.

DaveD

Sent from a small flat thingy

On Mar 3, 2018, at 11:06, Brian Bloom via Groups.Io <analogaddict013@...> wrote:

As far as I know, the PG506 calibration generator and SG504 leveled sinewave generator would be the ideal choice. They're compact and serve many of the purposes. The SG504 has a level output up to 1050Mhz while the SG503 only
goes to 250Mhz. I'm not sure what else may be out there that is in the $500.00 USD or less range, but those are the units that I also want, but don't actually need.

I'm currently equipped with what is recommended by the 485 manual, but those two plugins can handle the jobs of a shelf worth of the original manual specified calibration gear, so I'd most definitely try to find those plugins instead.

Also, my knowledge of calibration equipment doesn't extend beyond Tektronix made gear, so there's most likely other options out there as well.

-Brian



Re: What calibration items to buy.

 

As far as I know, the PG506 calibration generator and SG504 leveled sinewave generator would be the ideal choice. They're compact and serve many of the purposes. The SG504 has a level output up to 1050Mhz while the SG503 only
goes to 250Mhz. I'm not sure what else may be out there that is in the $500.00 USD or less range, but those are the units that I also want, but don't actually need.

I'm currently equipped with what is recommended by the 485 manual, but those two plugins can handle the jobs of a shelf worth of the original manual specified calibration gear, so I'd most definitely try to find those plugins instead.

Also, my knowledge of calibration equipment doesn't extend beyond Tektronix made gear, so there's most likely other options out there as well.

-Brian


Re: 2465B Test 05 Fail 24, can U500 Tek 155-0239-02 replaced by a Tek 155-0239-00 ?

 

Sorry all,

I should have searched first, and asked later....

By now I found several member messages about replacing them by lower number chips with good results, like a -02 replaced by a -01, like this one: /g/TekScopes/topic/7656536#123174
So the only question remaining is, will a -00 also work in a 2465B?


Un saludo,

Leo


2465B Test 05 Fail 24, can U500 Tek 155-0239-02 replaced by a Tek 155-0239-00 ?

 

Hi all,

My 2465B was working perfect yesterday, but today at Power-On it gave a "Test 05 Fail 24" error.

I followed the troubleshooting flowchart that led me to checking the signal at pin 28 of the U500 trigger hybrid. (TP 46)
According to the waveform in the manual it was spot on.

Since I have a second 2465B, I swapped the two U500 hybrid's, and the problem followed the first hybrid, so i need a 'new' one.

Both my hybrid's have Tek number 155-0239-02, does anybody know or has experience in replacing this -02 hybrid with a 155-0239-00?
I will try to search the forum for more info as well.

Thanks, un saludo,

Leo


Re: 5L4N Spectrum not Analyzing

 
Edited

I read that a double balanced mixer like this one suppresses the fundamental frequencies of the LO and AF frequencies and only leave the difference or additive frequencies to output. Now it makes sense that I had no main AF of 10KHz at the mixer's output. If the LO is dead there's no mixing and no other frequencies to output leaving it with nothing. So I feel good about switching gears to focus on the LO source problem.

I went ahead and pulled the decade counter U1044 out of the circuit and U1042B started properly dividing by 2 bringing the LO signal down to 2.5MHz. To be sure there wasn't anything else shorting out U1044 I lifted C1043 and unplugged P1040 (the final LO output signal) so the U1044 was some what isolated. U1044 still has no output. I suspect it has an internal short that is drawing too much current through U1042. The new U1044 should be here in a few days.


Can I install a 2465B motherboard in a 2445B chassis? What will I get?

 

I have an old A1 board with part number 671-0722-02, with a date of 1987 (design or manufactured?). I believe this part number is for a 2465B oscilloscope. Also, I can obtain a non-working 2445B for a low price. I am considering placing this 2465B A1 board in the 2445B chassis, clean it up, give it a hobbyist calibration. Will this give me a poor mans 2465B? What advice can the experts give me before setting out on this mission?


App Notes

 

Tektronix wrote a series of 10 app notes pertaining to photometric measurements. The App Notes are as follows:

60-W-5750
58-A-2635
58-A-2702-1
58-A-2704-1
58-AX-2764-1
58-A-2912
58-A-2926-1
58-AX-3060-1
58-AX-3252
58-AX-3602

Does anyone know where I can get pdf copies of these documents?

grbosworth@...


Re: Analog computing, X-Y display, was Re: [TekScopes] Wanted: Tek 503

jim
 

From: Ronald Carlson <ronald.carlson.54@...>
To: [email protected]
Sent: Friday, March 2, 2018 10:29 AM
Subject: Re: Analog computing, X-Y display, was Re: [TekScopes] Wanted: Tek 503

Toby,


Also checking out Rolynn's suggestion of a 602 or 604 monitor.

Thanks, Ron



I've got a 608 monitor that works well..It was a piece of medical gear ..Dumped the med stuff and built the 'w7zoi Specan' into the vacant space...Has x,y,z outputs also for my eventual curve tracer
Jim


Re: 5L4N Spectrum not Analyzing

 

I decided to chase down the missing LO signal coming into the mixer. The oscillator signal is correct all the way through to U1040 output 9 at 10MHz. The output pin 12 of U1042A JK Flip Flop is divded by 2 with 5MHz on the output. However, output pin 8 of U1042B is still at 5MHz and at about have the voltage. It's suppose to dived by 2 agains down to 2.5MHz. Then it heads over to U1044. The output pin 12 of U1044 is dead. U1042 is very hot but the power rails are good. I say good. The 5v rail is about 4.85v through out the unit. I think U1042 maybe bad and even the decade counter U1044 could be bad. I guess I could pull these two chips and see if the 5v comes back up to a full 5v.

I found both chips at Very resonable.


Re: Cheap differential probe ?

 

Thank You!!

After persevering with Google Search I have found a few designs of
varying complexity
that could suit me, good old WW - now the fun begins.

Regards,

Dave

On 03/03/2018 02:59, hpxref wrote:
Dave, if you want to roll your own get a copy of 'Electronics and
Wireless World"
DEC 2001 from yr local library. Page 922 has article 'Differential-in
100Mhz scope probe"
by Cyril Bateman. PC boards would not be available from him now, but
his fully specified circuit and construction methods
should help you achieve your aim. and be easily down gradable to your
target of 20MHz bandwidth with lower spec'd IC's
Some Specs are :

CMR : < 10Mhz >80dB>,70dB at 10MHz, 49dB at 120MHz (Ref 1V input and
10:1 attenuation set)

MAX4005 used inside the probes,MAX 4144 and MAX4107 used inside the
direct input to scope
box. Copper pipe used for probe bodies.
Its also easy to calibrate and adjust. Cyril is (was?) a professional
design engineer and a consultant
on capacitor design. He produced quite a few bits of pro spec'd test
instrumentation in E&WW and his Cap esr tester is
likely to have been (and still be ) the most accurate esr meter so far
ever designed for both enthusiast and semi pro work
I considered getting his PC boards at the time, but got myself a TEK
P6046 and amplifier unit which both worked and were in spec
(If you are thinking of buying these be aware that not many are now in
fully specified or even in working condition)

John




.


Re: Cheap differential probe ?

 

Dave, if you want to roll your own get a copy of 'Electronics and Wireless World"
DEC 2001 from yr local library. Page 922 has article 'Differential-in 100Mhz scope probe"
by Cyril Bateman. PC boards would not be available from him now, but his fully specified circuit and construction methods
should help you achieve your aim. and be easily down gradable to your target of 20MHz bandwidth with lower spec'd IC's
Some Specs are :

CMR : < 10Mhz >80dB>,70dB at 10MHz, 49dB at 120MHz (Ref 1V input and 10:1 attenuation set)

MAX4005 used inside the probes,MAX 4144 and MAX4107 used inside the direct input to scope
box. Copper pipe used for probe bodies.
Its also easy to calibrate and adjust. Cyril is (was?) a professional design engineer and a consultant
on capacitor design. He produced quite a few bits of pro spec'd test instrumentation in E&WW and his Cap esr tester is
likely to have been (and still be ) the most accurate esr meter so far ever designed for both enthusiast and semi pro work
I considered getting his PC boards at the time, but got myself a TEK P6046 and amplifier unit which both worked and were in spec
(If you are thinking of buying these be aware that not many are now in fully specified or even in working condition)

John


FS: manual for Tektronix 515/515A; the 503 manual is spoken for

Brad Thompson
 

Hello--

I'm offering FS one each manual for a Tek 515/515A oscilloscope (no serial no.).

The manual is in VG condition (front cover missing a section near its
model-number window) and is unannotated.

I'm asking $5.00 plus USPS media-mail postage.

Questions welcomed, PayPal honored.

Thanks, and 73--

Brad AA1IP


Re: Analog computing, X-Y display, was Re: [TekScopes] Wanted: Tek 503

Byron Hayes, Jr.
 

Or find a Tektronix 536 oscilloscope and put identical plug-ins in the vertical and horizontal channels. Get a T plug-in with it so you have a time base if needed.

Byron WA6ATN

At 12:31 PM 3/2/2018, Ed Breya via Groups.Io wrote:
I'd recommend just using almost any analog scope that has X-Y capability for display. For low frequencies including audio, the response of the V and H should be virtually identical - you can easily check to be sure. Scaling is no big deal, and can be set up with the scope's range, variable, and position controls to whatever is needed. Even if not, a simple interface circuit should do the trick. You can also use a DSO if it has X-Y, to record very slow or single-shot experiments. Or, an analog storage scope.

I've always had a soft spot for analog computers. Years ago, I had planned to build one, with lots of the usual function elements, and also some digital (kind of cheating) enhancements like A/D-EPROM-D/A operators for non-linear and arbitrary functions. The problem was that there were so many possible options that my tendency to overdo things would have made it a mind-boggling, complicated mess of functions and interconnect issues. So I never did it, but it's fun to think about.

Until this discussion came up, I had no idea that analog computers are still so popular in some circles - looking online a little now, I see that they are alive and well to some extent, even though PCs and SW can do all that and more. There's something to be said for the real thing, hands-on experience.

BTW, I stumbled upon a manual for the GP-6, that appears to include all the circuit schematics. If you haven't found this already, here it is:


Good luck,
Ed