Date   
Test-Equipment Manuals Available

Brian <brianclarke01@...>
 

Hello folks,

I have these manuals available, all in VGC:

Hung Chang Multi-function counter, instruction manual, original

Marconi TF 144H series II operating and maintenance handbook, original

Solartron CD 1400 series technical manual, original

TEK Type 3L10 Spectrum analyzer plug-in instruction manual, comb-bound, copy

TEK Type B plug-in instruction manual, comb-bound, copy

TEK Type 1A1 plug-in instruction manual, comb-bound, copy

TEK Type 1A4 plug-in instruction manual, comb-bound, original

TEK Type 82 plug-in instruction manual, comb-bound, copy

TEK Type 130 L-C meter instruction manual, comb-bound, original

TEK Type 132 plug-in Power supply instruction manual, comb-bound, original

TEK Type 585A Oscilloscope, comb-bound, copy

Telequipment D43R oscilloscope mainframe, original

Telequipment Type C2 plug-in amplifier, original

Telequipment Type G plug-in amplifier, original

Please QSO off-line via email to haggle.

73 de Brian, VK2GCE.

Re: Tek 2215

 

On Tue, 26 Jan 2016 00:42:40 -0600 (CST), you wrote:

On Mon, 25 Jan 2016, David @DWH [TekScopes] wrote:

The replacements were physically smaller than the original parts. I
thought Tektronix might have selected the originals for good RF
performance but other than size, they are the same series of film
resistors used throughout the rest of the oscilloscope and a transient
response test showed that the new physically smaller replacements
worked fine.

I did not check it before since I did not have more than one resistor
to select from but the Dale MFF series datasheet says "very good high
frequency characteristics" for whatever that is worth:

http://www.33audio.com/enter/data/DaleFilmpart2.pdf
I believe I found them. They are actually the same Vishay/Dale CCF series
I was going to use for R398 and R399, although it appears I inadvertently
ordered 15 ohm instead of 51 ohm for those two (good thing I only
purchased 10), so I guess those are going on the next parts order.

R378,R379,R388,R389 340 ohm 1% 1/2W metal film Dale MFF1226G340R0F

Replace with Vishay/Dale CCF60340RFKE36

R398,R399 51 ohm 5% 1/2W carbon comp Allen-Bradley EB5105

Replace with Vishay/Dale CCF6051R1FKE36 (51.1ohm, but close enough ;)
There is probably no reason to preemptively replace them if close
inspection shows no damage. On the one I repaired, the resistors were
visibly discolored but the cracks could not be seen with the CRT in
place until they were removed.

The symptom of attenuated and nonlinear vertical deflection pointed
directly at the collector load resistors and ohms measurement from the
bottom of the printed circuit board conclusively showed they were bad.
They were the first thing I checked because it was easy to do and
visual inspection showed that the printed circuit board itself was
discolored from high temperature in the area under and around them.

The value for the 51 ohm series resistors is not critical but I wonder
how hot they run and about higher parasitic inductance of spiral cut
film resistors. Why did Tektronix use carbon composition resistors
there?

Re: Tek 2215

Craig Sawyers <c.sawyers@...>
 

The symptom of attenuated and nonlinear vertical deflection pointed directly at the collector load
resistors and ohms measurement from the bottom of the printed circuit board conclusively showed
they were bad.
They were the first thing I checked because it was easy to do and visual inspection showed that
the
printed circuit board itself was discolored from high temperature in the area under and around
them.

The value for the 51 ohm series resistors is not critical but I wonder how hot they run and about
higher
parasitic inductance of spiral cut film resistors. Why did Tektronix use carbon composition
resistors
there?


------------------------------------
Posted by: David <@DWH>
------------------------------------
Tek had a bit of a blind spot when it came to power dissipation in resistors on circuit boards.
They invariably mounted them tight to the board. So even if the part was operating inside its
dissipation limit, that power specification is always quoted by the resistor manufacturer "in free
air". Resistors which are dissipating a decent percentage of their power limit should be mounted on
spacers (which can be just a few mm) to ensure good air flow. If you put them tight to the board,
the contact is a hot spot which (a) discolours, or in some instances burns the board and (b)
compromises the lifetime of the resistor. Seen the same thing is some classic era Fluke gear too.

Re: Tek 2215

Tothwolf
 

On Tue, 26 Jan 2016, David @DWH [TekScopes] wrote:
On Tue, 26 Jan 2016 00:42:40 -0600 (CST), you wrote:

I believe I found them. They are actually the same Vishay/Dale CCF series I was going to use for R398 and R399, although it appears I inadvertently ordered 15 ohm instead of 51 ohm for those two (good thing I only purchased 10), so I guess those are going on the next parts order.

R378,R379,R388,R389 340 ohm 1% 1/2W metal film Dale MFF1226G340R0F

Replace with Vishay/Dale CCF60340RFKE36

R398,R399 51 ohm 5% 1/2W carbon comp Allen-Bradley EB5105

Replace with Vishay/Dale CCF6051R1FKE36 (51.1ohm, but close enough ;)
There is probably no reason to preemptively replace them if close inspection shows no damage. On the one I repaired, the resistors were visibly discolored but the cracks could not be seen with the CRT in place until they were removed.
I was mainly thinking if I space them away from the boards, there will be less heat to discolor the boards in B0228xx and B0229xx, and will also help prevent any further heat damage to B0233xx.

The symptom of attenuated and nonlinear vertical deflection pointed directly at the collector load resistors and ohms measurement from the bottom of the printed circuit board conclusively showed they were bad. They were the first thing I checked because it was easy to do and visual inspection showed that the printed circuit board itself was discolored from high temperature in the area under and around them.
I could certainly measure them with a thermocouple, however since the board in B0233xx is showing signs discoloration/heat damage just around R378,R379,R388,R389, that alone probably means those resistors are running hot enough where they shouldn't be in direct contact with the board.

The value for the 51 ohm series resistors is not critical but I wonder how hot they run and about higher parasitic inductance of spiral cut film resistors. Why did Tektronix use carbon composition resistors there?
Given that one of the scopes had one carbon film and one carbon comp fitted for R398 and R399 from the factory, it may be that the carbon comp resistors were just readily available 1/2W resistors. I came across this with other 1/4W and 1/2W resistors in these scopes where carbon film and carbon comp seemed to be used almost interchangeably. The downside to the carbon comp parts of course, is that many of them have drifted out of spec, which is why I've replaced quite a few with metal oxide or carbon film parts.

Re: Tek 2215

Tothwolf
 

On Tue, 26 Jan 2016, 'Craig Sawyers' c.sawyers@... [TekScopes] wrote:
On Tue, 26 Jan 2016, David @DWH [TekScopes] wrote:

The symptom of attenuated and nonlinear vertical deflection pointed directly at the collector load resistors and ohms measurement from the bottom of the printed circuit board conclusively showed they were bad. They were the first thing I checked because it was easy to do and visual inspection showed that the printed circuit board itself was discolored from high temperature in the area under and around them.

The value for the 51 ohm series resistors is not critical but I wonder how hot they run and about higher parasitic inductance of spiral cut film resistors. Why did Tektronix use carbon composition resistors there?
Tek had a bit of a blind spot when it came to power dissipation in resistors on circuit boards. They invariably mounted them tight to the board. So even if the part was operating inside its dissipation limit, that power specification is always quoted by the resistor manufacturer "in free air". Resistors which are dissipating a decent percentage of their power limit should be mounted on spacers (which can be just a few mm) to ensure good air flow. If you put them tight to the board, the contact is a hot spot which (a) discolours, or in some instances burns the board and (b) compromises the lifetime of the resistor. Seen the same thing is some classic era Fluke gear too.
Maybe mounting such resistors directly to the board was part of the new low-cost process Tektronix was using for the 2213/2215 scopes? All of the boards apart from the preregulator add-on board were made from a single panel which was snapped apart after soldering and all of the components had their leads clenched to hold them into the boards during the wave soldering process.

The only real exception I noted was R911 near the center of the preregulator boards. It is hard to see in the photos, but the original R911 had formed leads to keep it spaced away from the board.

http://strudel.ignorelist.com/~tothwolf/photos/Tektronix_2213/Tektronix_2213_2/1600/IMG_8886.1600.jpg
http://strudel.ignorelist.com/~tothwolf/photos/Tektronix_2213/Tektronix_2213_3/1600/IMG_9379.1600.jpg

Do you think the Richco CER-6 spacers will be sufficient for R378,R379,R388,R389? With a single spacer under each lead, a Vishay/Dale CCF60340RFKE36 resistor would probably only be 2-3mm away from the board, although the spacers are designed so they can be stacked.

One other issue I noticed which I forgot to mention in my posts to the list last year was the metal bracket that the focus control is mounted to was showing signs of tin whisker growth in all 3 of my 2213 scopes. While I had it and the potentiometer removed so I could replace the 6 1M ohm resistors, I lightly abraded the surface of the bracket to knock the tin whiskers down, but I know if I leave the plating as-is, they will without a doubt eventually return. I am considering using electrolysis to strip the tin plating and then replate the steel bracket with nickel. You can just barely see eruptions in the tin plating on the right side of the bracket in this photo, but up close, 3-5mm long tin whiskers were pretty easy to see.

http://strudel.ignorelist.com/~tothwolf/photos/Tektronix_2213/Tektronix_2213_3/1600/IMG_9288.1600.jpg

Re: Tektronix TDS754D Fail++ Processor error + firmware

 

I have a DS1486 binary with 13 1F 1M 2F and 2C.
If you put the binary into your DS1486 chip you'll also gain option 1M.
You'll need a stand-alone programmer. send me an email and I'll get it to you.
Jay

Re: Tek 2215

stefan_trethan
 

You might be able to tin the sheetmetal using 60/40 solder and a big
soldering iron or a hotplate or something.
That would solve the problem for good.

(Although light brushing and painting with some acrylic laquer would
probably suffice to eliminate any issues during your lifetime).

ST


On Tue, Jan 26, 2016 at 12:12 PM, Tothwolf tothwolf@...
[TekScopes] <TekScopes@...> wrote:

One other issue I noticed which I forgot to mention in my posts to the
list last year was the metal bracket that the focus control is mounted to
was showing signs of tin whisker growth in all 3 of my 2213 scopes. While
I had it and the potentiometer removed so I could replace the 6 1M ohm
resistors, I lightly abraded the surface of the bracket to knock the tin
whiskers down, but I know if I leave the plating as-is, they will without
a doubt eventually return. I am considering using electrolysis to strip
the tin plating and then replate the steel bracket with nickel. You can
just barely see eruptions in the tin plating on the right side of the
bracket in this photo, but up close, 3-5mm long tin whiskers were pretty
easy to see.

http://strudel.ignorelist.com/~tothwolf/photos/Tektronix_2213/Tektronix_2213_3/1600/IMG_9288.1600.jpg


------------------------------------
Posted by: Tothwolf <tothwolf@...>
------------------------------------

Re: Viable alternative to Yahoo

 

SPOT ON , Stefan!!!

"Short story is, as much as people dislike and distrust yahoo, in the
end it turns out they distrust you even more (hard truth, I know).

And they definitely do not like change, at all.

Until yahoo croaks for good (which is likely) you are wasting your time."

Re: Tek 2215

Craig Sawyers <c.sawyers@...>
 

Maybe mounting such resistors directly to the board was part of the new low-cost process Tektronix
was using for the 2213/2215 scopes? All of the boards apart from the preregulator add-on board
were
made from a single panel which was snapped apart after soldering and all of the components had
their
leads clenched to hold them into the boards during the wave soldering process.
Nope - the 7000 series is exactly the same. Main culprits are the x amplifier in most, and HT
resistor stack on the 7704A (Tek changed the design of that many times - earlier versions carbonised
the PCB).

Craig

Re: Tek 2215

 

Not forgetting the Vertical amp in the 7904 which has two *very* marginally
specified 1W resistors snugged right up the to the PCB, and which are almost
always out of specification.

Dave

-----Original Message-----
From: TekScopes@... [mailto:TekScopes@...]
Sent: 26 January 2016 12:41
To: TekScopes@...
Subject: RE: [TekScopes] Tek 2215

Maybe mounting such resistors directly to the board was part of the
new low-cost process Tektronix was using for the 2213/2215 scopes? All
of the boards apart from the preregulator add-on board
were
made from a single panel which was snapped apart after soldering and
all of the components had
their
leads clenched to hold them into the boards during the wave soldering
process.

Nope - the 7000 series is exactly the same. Main culprits are the x
amplifier in most, and HT resistor stack on the 7704A (Tek changed the
design of that many times - earlier versions carbonised the PCB).

Craig

Re: help wanted ..console port or service port for TDSxxx

David Thomas
 

Hi "bddich",
you need a board with a 68xxx compatible UART chip and some
decode logic to do this. From there, you will get a pretty standard
RS232 connection into Hyperterminal.

There are circuits around on the Tek site - main problem is that the
original UART they used is a bit hard to find nowadays - there are
others which I think are compatible at a register level...

I have been thinking about making one of these for myself - if I do, any
interest from the group for PCBs, or finished boards?

Best Regards

David T

**

On 25/01/2016 22:54, bddicch@... [TekScopes] wrote:

Hello can someone help me out and tell me how to connect to the
console port from my tds scope.
it is the 2x10 edge connector on the processor PCB.


building an adapter to connect the RS232/Centronics board (option 13)
to that connector. required pin assigment is:

Console port -Opt Board - Signal Name
A10 - 1 (D24)
B10 - 3 (D25)
A9 - 5 (D26)
B9 - 7 (D27)
B8 - 2 (D28)
A7 - 4 (D29)
B7 - 6 (D30)
A6 - 8 (D31)

B1 - 21 (A1)
A1 - 23 (A2)
B2 - 25 (A3)
A2 - 22 (A4)
+5V 24 (A5)
GND 26 (A6)

B5 - 12 (INT#)
B4 - 15 (IOCS#)
A5 - 16 (SYSRESET#)
A4 - 17 (RNW)
+5V - 18
+5V - 11

A8 GND
B6 +5V


but these are the pins from the console port connector. My question
howto connect to this port to my laptop and open a terminal console
over the RS232 port.


any body can help me out and give more info?

[Non-text portions of this message have been removed]



[Non-text portions of this message have been removed]

Re: Viable alternative to Yahoo

Torch Fireman
 

<lol> Ok, I get the message: Members reserve the right to bitch about the Yahoo for sport. Kind of like Canadians complaining about the weather. If the problems were fixed the sport would be spoiled.

Seriously, I do get the point about the new guy being untrusted. "A bird in the hand is worth two in the bush" and all. Nobody would want to make the switch and then discover the new forum disappeared overnight. There is also the consideration that this group is a well known resource with links pointing to it from many related forums -- that's how I found you. Moving would result in dead links and frustrated potential new blood. So there are some really good reasons not to move.

So I'll just ignore any further complaints about Yahoo.

(Just for the record, I've been listowner elsewhere for 14 years and website admin for a group of sites for 10. I'm just new to you guys. ;-) )

On 26/01/2016 7:05 AM, @DavidG [TekScopes] wrote:

SPOT ON , Stefan!!!

"Short story is, as much as people dislike and distrust yahoo, in the
end it turns out they distrust you even more (hard truth, I know).

And they definitely do not like change, at all.

Until yahoo croaks for good (which is likely) you are wasting your time."

Re: Viable alternative to Yahoo

stefan_trethan
 

Doesn't matter about the new guy thing, or your experience, given the
prior attempts to make things better.

You could be struck by lightning tomorrow.
It is unlikely that all the Yahoo guys are struck by lightning, no
matter how many people want that ;-).

You just have to ignore the complaints, and the regular offers to do
something about it.

ST

On Tue, Jan 26, 2016 at 5:05 PM, Dwayne Verhey tekscopes@...
[TekScopes] <TekScopes@...> wrote:
<lol> Ok, I get the message: Members reserve the right to bitch about
the Yahoo for sport. Kind of like Canadians complaining about the
weather. If the problems were fixed the sport would be spoiled.

Seriously, I do get the point about the new guy being untrusted. "A bird
in the hand is worth two in the bush" and all. Nobody would want to make
the switch and then discover the new forum disappeared overnight. There
is also the consideration that this group is a well known resource with
links pointing to it from many related forums -- that's how I found you.
Moving would result in dead links and frustrated potential new blood. So
there are some really good reasons not to move.

So I'll just ignore any further complaints about Yahoo.

(Just for the record, I've been listowner elsewhere for 14 years and
website admin for a group of sites for 10. I'm just new to you guys. ;-) )


On 26/01/2016 7:05 AM, @DavidG [TekScopes] wrote:

SPOT ON , Stefan!!!

"Short story is, as much as people dislike and distrust yahoo, in the
end it turns out they distrust you even more (hard truth, I know).

And they definitely do not like change, at all.

Until yahoo croaks for good (which is likely) you are wasting your time."


------------------------------------
Posted by: Dwayne Verhey <tekscopes@...>
------------------------------------


------------------------------------

Yahoo Groups Links


Re: Tek 2215

Jay
 

Re: Tek 2215

 

I would go over it with a soldering iron after lightly sanding the
surfaces. Assuming that you can remove it easily from the printed
circuit board, dilute HCl can be used if wetting is a problem.

On Tue, 26 Jan 2016 13:04:28 +0100, you wrote:

You might be able to tin the sheetmetal using 60/40 solder and a big
soldering iron or a hotplate or something.
That would solve the problem for good.

(Although light brushing and painting with some acrylic laquer would
probably suffice to eliminate any issues during your lifetime).

ST

On Tue, Jan 26, 2016 at 12:12 PM, Tothwolf tothwolf@...
[TekScopes] <TekScopes@...> wrote:

One other issue I noticed which I forgot to mention in my posts to the
list last year was the metal bracket that the focus control is mounted to
was showing signs of tin whisker growth in all 3 of my 2213 scopes. While
I had it and the potentiometer removed so I could replace the 6 1M ohm
resistors, I lightly abraded the surface of the bracket to knock the tin
whiskers down, but I know if I leave the plating as-is, they will without
a doubt eventually return. I am considering using electrolysis to strip
the tin plating and then replate the steel bracket with nickel. You can
just barely see eruptions in the tin plating on the right side of the
bracket in this photo, but up close, 3-5mm long tin whiskers were pretty
easy to see.

http://strudel.ignorelist.com/~tothwolf/photos/Tektronix_2213/Tektronix_2213_3/1600/IMG_9288.1600.jpg

Re: Tek 2215

Craig Sawyers <c.sawyers@...>
 

Have you guys seen this ??

Mod Kits, Parts Replacement Kits and other documents http://hakanh.com/dl/kits.htm
Hakan is one of the good guys on this list - but I actually did not know (or have forgotten) that he
had an archive of Tek data.

Craig

Re: Hello from new member w 2465A issues

Armin Schon
 

After confirming that C1016 and C018 have blown up I wonder why they would fail within seconds of each other. Is that to be expected they way this circuit works, or does it point to the failure of another component, which cause the caps to blow out?

Re: Tek 2215

 

I have but last time I looked the actual PDF files were not linked; it
was just a list.

"This modification kit contains the parts and instructions for
installing a fan system [into] a standard 7603 Oscilloscope. The fan
provides cooling for improved reliability, especially when high power
consumption plug-ins are used in the mainframe."

That's the fan I have! 7603 fan mystery solved!

Re: Hello from new member w 2465A issues

Ed Breya
 

I haven't been following this story, but if the blown caps are the main raw DC filters after the rectifiers, you should always check the rectifiers or bridge before turning it back on with fresh caps. A shorted rectifier may quickly ruin a new cap.


If you have a curve tracer, you can run up the AC input to the PS with it and get a good idea of what's going on.


Ed

Tek Type M Four Trace Preamp F.S.

Bill (Doc) Courtright
 

More house cleaning, I have a fairly nice Type M 4 trace preamp P.I., nuvistor based with a couple of tubes. It was last used about 20 years ago when I had a nice working 547. That got left behind when moving to MA but I kept the PI hoping to find another mainframe.
It is complete and in nice condition but will need detailed cleaning and cleaner on the switches as I can see that the silver plated contacts have tarnished. There is also some soot filming that cleans off easily with alcohol.
Asking $45 plus shipping from 01247 via USPS for about 5.5 lbs.
Thanks,
Bill
KB3DKS