Date   

Re: TDS520 Option 13

jafinch78 .
 

Thanks David for sharing.

Interesting as I was planning on salvaging the female RS232 DB9 plug from an old IBM motherboard and checked all the chips for a UART transceiver and found a F245 that I was wondering if I could use as well as a SN75C185.

I saved the files, though looks like that post is using the J40 Console Edge Connector with a cable or pcb connectors to the J37 female Option 13 board connector which isn't in the same format though that board has chip(s) to convert and the Option 13 Board RS232/DB9 connector to connect to a cable to a computer.

I don't have the Option 13 board readily available so am going to make a custom version starting from the J40 Console 20 pin Edge Connector with a ribbon cable going to a wafer board with a PLCC44 socket for a SCN68681C1A44 with a CSX750FCC-3.6864M-UT clock... then three jumpers to determine to use RTS/CTS flow control with a SparkFun SOIC to DIP Adapter - 16-Pin for the ADUM1402WTRWZ afterwards a RS232/DB9 output and a SparkFun SSOP to DIP Adapter - 20-Pin for the 16-pin FT230XS-R then a USB output. Along with some capacitors, LED's and resistors.

The sparkfun adapters will make soldering easier using the wafer board I already have. I have to practice soldering the chips from the IBM board since I haven't desoldered and soldered SOIC/SSOP chips yet. I figure I'd do as found testing, desolder, solder back on and as left testing to make sure I'm confident and can do in like under 3 seconds at ~300'C.

I'm also going to tap into J18: 1 = H sync, 2 = V sync, 3 = Video Out or J5: 8 = H sync , 10 = V sync , 13 = Video Out (J18 seems easier since test pins) for a VGA output that I am almost thinking while I'm at it I can add an RCA output circuit also just for the fun of the output option. I'm thinking I'll use a pot to determine the optimal resistor(s) to use for ground as I've read this helps the image. I don't have an A20/A21 CRT board specification so I am not sure the video output potential there also to adapt into the custom board or use a microcontroller board to adjust the aspect ratio and refresh rates for a bunch of different monitor types.

I'm thinking I'm going to stick with the my design for now. I was hoping I could directly tap the J37 or J40 connectors with a RS232/DB9 connector and wires... though the format is different from what I can tell and I need a format conversion chip since no direct TX/RX as is found on the TDS-420's.


Re: Repairing a 466 oscilloscope

Nikolay Belikov
 

I've got another question. How does one remove a faceplate on a 4xx scope? I took off all the knobs and bushings, but the plate is still being held somehow by scale factor lampholders, although I don't see any evidence that they are locked together on the drawings. I can wiggle the plate a bit, and the lampholders would move together with it, but the plate refuses to lift when I pry it gently. I hope I don't have to remove the vertical preamplifier board, the attenuator assemblies and the lampholders to loosen the plate.

Nik


Re: Typeface used on 7000-series and 11000-series front panels

cmjones01
 

On Tue, Jan 9, 2018 at 08:23 pm, TomC wrote:
On 1/9/2018 12:33 PM, cmjones01 wrote:
I'm making some modifications to the front panel of my CSA803A and am likely
to get a new front panel film for the acquisition module printed. I'd like to
identify the typeface Tektronix used. It looks the same as the one on the 7000
series and other 11000 series plugins. My best guess so far is that it's a
badly-kerned version of Univers Bold:
You can take a good closeup of some of the text that you wish to match and
upload it to any of a number of online font ID tools. Examples are What the
font, and Fontsquirrel. Do a search for identify font from image.

I tried it with TIME DIV from a 7B80 plugin and Urbano black seems to be a
good
match.
That's good to know, thank you. Urbano seems to be extremely similar to Univers.

Chris


Re: TDS520 Option 13

David Thomas
 

there is a Tek forum post about using the Option 13 PCB as a diagnostic interface on TDS scopes:


https://forum.tek.com/viewtopic.php?f=568&t=137307


.. although info on the exact cable wiring is not "obvious". However, the last couple of posts (see page 2) describe a PCB, which embodies the wiring crossover...

--
Best Regards

David Thomas


Re: Typeface used on 7000-series and 11000-series front panels

cmjones01
 

On Tue, Jan 9, 2018 at 01:53 pm, <toby@...> wrote:
On 2018-01-09 3:33 PM, cmjones01 wrote:
I'm making some modifications to the front panel of my CSA803A and am likely
to get a new front panel film for the acquisition module printed. I'd like to
identify the typeface Tektronix used. It looks the same as the one on the 7000
series and other 11000 series plugins. My best guess so far is that it's a
badly-kerned version of Univers Bold:

https://www.myfonts.com/fonts/linotype/univers/

Does anyone have a definitive answer? And no, Arial is *not* close enough.
It never is. Somehow I'm really sensitive to these things...
I'd be happy to have a look if you have a picture?
I don't have a picture to hand but it's definitely the same typeface as used on the 7000-series and 465/475 era, and the very late 500-series gear (549, 1A4, 1L40 I've definitely seen it on).

The older scopes _definitely_ use Univers and Univers Condensed (e.g.
466 model).
That's good to know. I think that's a positive ID: it's identical to what I'm looking for. Thank you.

Chris


Re: Typeface used on 7000-series and 11000-series front panels

cmjones01
 

On Tue, Jan 9, 2018 at 12:48 pm, Colin Herbert wrote:
Hi Chris,
I did a copy of a Tek 464 handle label some time ago and the closest font that
I could get was Calibri. Of course, this might be of no use to you at all, as
the 7k- and 11k-series might be completely different. But then my 7623A scope
looks familiar....
I think the display font used for the model numbers and handle labels is different to the one used for the control panel labels. Calibri's numeral '1', for example, is very different to that on the Tek control panels.

PS. Are you the C M Jones who is a member of the UKVRRR forum in the UK? If
so, I am ColinTheAmpMan1.
I am, the very same. Small world, isn't it! Please to meet you in both places :-)

Chris


Re: Are these Tek or HP parts?

Nenad Filipovic
 

At 04:13 PM 1/9/2018, Richard Solomon wrote:

Groups.io may be the best thing since sliced bread, but at least on the
last three times I try to access a link, it tells me that my account is
bouncing and I need to reset it.

Any idea what causes these bounces ??
I also have a pretty messed up situation - I had an account with
Groups.io registered
to my secondary email address prior to TekScopes migration, so the
migration actually created a duplicate subscription once it introduced my
primary address associated to old Yahoo subscription. This resulted in
double posting each time I replied to the group (TekScopes I guess), so I
decided to delete one of these subscriptions (the old one, in order to
preserve the same identity I used while we were on Yahoo), and everything
seemed fine for some (short) time.

This morning after trying to open the link from this thread I see something
is seriously wrong now. I seem to be the member of TekScopes2 only with my
secondary address, and not a member of TekScopes at all? I also see that
some people are posting to TekScopes2, while most others are posting
to TekScopes.
I'm not even sure this message will go through at all. Will need to
investigate this further once I get the time.

Best Regards,
Nenad Filipovic


Re: Typeface used on 7000-series and 11000-series front panels

TomC
 

On 1/9/2018 12:33 PM, cmjones01 wrote:
Tek fans,
I'm making some modifications to the front panel of my CSA803A and am likely to get a new front panel film for the acquisition module printed. I'd like to identify the typeface Tektronix used. It looks the same as the one on the 7000 series and other 11000 series plugins. My best guess so far is that it's a badly-kerned version of Univers Bold:
https://www.myfonts.com/fonts/linotype/univers/
Does anyone have a definitive answer? And no, Arial is *not* close enough. It never is. Somehow I'm really sensitive to these things...
Chris

Chris,

You can take a good closeup of some of the text that you wish to match and upload it to any of a number of online font ID tools. Examples are What the font, and Fontsquirrel. Do a search for identify font from image.

I tried it with TIME DIV from a 7B80 plugin and Urbano black seems to be a good match.

Tom


Re: Transistor Cross Reference

Gary Robert Bosworth
 

Dave: The N101 is used in the 3A74 Plug-In (a four-trace plug-in good to 2
MHz) They are transistors Q444, Q454, Q583 Position Range and Sync In. I
have attached the schematic for your use.

Gary

On Tue, Jan 9, 2018 at 2:16 AM, David Hess <@DWH> wrote:

The 151-0062-00 GA1392 is a 70 MHz, 60 volt, and 50 milliamp germanium
NPN transistor so the 2N3904 will work as a substitute in some cases
and that is what I would try first. It would help to see the
schematic.

On Mon, 8 Jan 2018 04:22:47 -0600, you wrote:

The Tek cross reference shows the 151-0062-00 to be a GA1392. I know that
in some applications, such as the 3B1 and 3B3 plug-ins, a product
modification (050-0581-00) was issued to replace the -0062 with a -0224
(2N3904).

Dave Casey

On Mon, Jan 8, 2018 at 2:58 AM, Gary Robert Bosworth <
@grbosworth>
wrote:

Does anyone know a good cross for the Tektronix transistor N101
(151-062)?



--
Gary Robert Bosworth
@grbosworth
Tel: 310-317-2247


Re: 475 Repair - Fixed

James Brennan, Jr.
 

Earlier I had reported I had narrowed problem to Vertical Output Circuit
Board Assembly A5 (670-2242-00).
Specifically, isolated problem to Hybrid Vertical Output Amplifier U470
(155-0082-00).

Today, I have successfully replaced the Vertical Output Circuit Board
Assembly with a refurbished one I obtained from an eBay supplier
"qservice_rhodes" at a cost of $44 plus $9 shipping from Athens. Cost of
a replacement IC was higher than the cost of the entire assembly,
including the IC.


Re: Are these Tek or HP parts?

Dale H. Cook
 

At 04:13 PM 1/9/2018, Richard Solomon wrote:

Groups.io may be the best thing since sliced bread, but at least on the last three times I try to access a link, it tells me that my account is bouncing and I need to reset it.

Any idea what causes these bounces ??
No idea - it never happens here.

Dale H. Cook, GR / HP Collector, Roanoke/Lynchburg, VA
http://plymouthcolony.net/starcity/radios/index.html


Re: Typeface used on 7000-series and 11000-series front panels

toby@...
 

On 2018-01-09 3:33 PM, cmjones01 wrote:
Tek fans,

I'm making some modifications to the front panel of my CSA803A and am likely to get a new front panel film for the acquisition module printed. I'd like to identify the typeface Tektronix used. It looks the same as the one on the 7000 series and other 11000 series plugins. My best guess so far is that it's a badly-kerned version of Univers Bold:

https://www.myfonts.com/fonts/linotype/univers/

Does anyone have a definitive answer? And no, Arial is *not* close enough. It never is. Somehow I'm really sensitive to these things...
Hi Chris

I'd be happy to have a look if you have a picture?

The older scopes _definitely_ use Univers and Univers Condensed (e.g.
466 model).

--Toby

Chris




Re: Are these Tek or HP parts?

Richard Solomon <dickw1ksz@...>
 

Groups.io may be the best thing since
sliced bread, but at least on the last
three times I try to access a link, it
tells me that my account is bouncing
and I need to reset it.

Any idea what causes these bounces ??

Tnx, Dick, W1KSZ

On Tue, Jan 9, 2018 at 1:39 PM, Daniel Koller via Groups.Io <
kaboomdk=yahoo.com@groups.io> wrote:

Hi Folks,
Please see the picture in https://groups.io/g/
TekScopes/photo/14911/0?p=Name,,,20,1,0,0
What are these parts? Because of their color, I want to make sure they
are not some obscure Tek scope part before I discard them. There are two
of them, and one is show disassembled (I think the glue line broke). The
washer goes in the narrow end, followed by the spring, and then the cap.
Does anyone know what these are?

Dan




Re: Typeface used on 7000-series and 11000-series front panels

Colin Herbert
 

Hi Chris,
I did a copy of a Tek 464 handle label some time ago and the closest font that I could get was Calibri. Of course, this might be of no use to you at all, as the 7k- and 11k-series might be completely different. But then my 7623A scope looks familiar....
Good Luck, Colin.
PS. Are you the C M Jones who is a member of the UKVRRR forum in the UK? If so, I am ColinTheAmpMan1.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of cmjones01
Sent: 09 January 2018 20:33
To: TekScopes@groups.io
Subject: [TekScopes] Typeface used on 7000-series and 11000-series front panels

Tek fans,

I'm making some modifications to the front panel of my CSA803A and am likely to get a new front panel film for the acquisition module printed. I'd like to identify the typeface Tektronix used. It looks the same as the one on the 7000 series and other 11000 series plugins. My best guess so far is that it's a badly-kerned version of Univers Bold:

https://www.myfonts.com/fonts/linotype/univers/

Does anyone have a definitive answer? And no, Arial is *not* close enough. It never is. Somehow I'm really sensitive to these things...

Chris


Are these Tek or HP parts?

Daniel Koller
 

Hi Folks,
   Please see the picture in https://groups.io/g/TekScopes/photo/14911/0?p=Name,,,20,1,0,0
  What are these parts?   Because of their color, I want to make sure they are not some obscure Tek scope part before I discard them.  There are two of them, and one is show disassembled (I think the glue line broke).  The washer goes in the narrow end, followed by the spring, and then the cap.
  Does anyone know what these are?

  Dan


Typeface used on 7000-series and 11000-series front panels

cmjones01
 

Tek fans,

I'm making some modifications to the front panel of my CSA803A and am likely to get a new front panel film for the acquisition module printed. I'd like to identify the typeface Tektronix used. It looks the same as the one on the 7000 series and other 11000 series plugins. My best guess so far is that it's a badly-kerned version of Univers Bold:

https://www.myfonts.com/fonts/linotype/univers/

Does anyone have a definitive answer? And no, Arial is *not* close enough. It never is. Somehow I'm really sensitive to these things...

Chris


Re: 2465b A2 board -8volt reg overheat

 

I have an early power supply that looks exactly like that but seems to work just fine.


Re: Repairing a 466 oscilloscope

Nikolay Belikov
 

Yes, I know they have it. If nobody is willing to send a free copy or knows where to get one, I'll purchase one there.


Re: 2465b A2 board -8volt reg overheat

David Az
 

Check the ESR of the electrolyte capacitors
C1102 100UF (unreg -8v) A3 Board
and
C1350 100UF A2 Board


Re: Transistor Cross Reference

 

The 151-0062-00 GA1392 is a 70 MHz, 60 volt, and 50 milliamp germanium
NPN transistor so the 2N3904 will work as a substitute in some cases
and that is what I would try first. It would help to see the
schematic.

On Mon, 8 Jan 2018 04:22:47 -0600, you wrote:

The Tek cross reference shows the 151-0062-00 to be a GA1392. I know that
in some applications, such as the 3B1 and 3B3 plug-ins, a product
modification (050-0581-00) was issued to replace the -0062 with a -0224
(2N3904).

Dave Casey

On Mon, Jan 8, 2018 at 2:58 AM, Gary Robert Bosworth <@grbosworth>
wrote:

Does anyone know a good cross for the Tektronix transistor N101 (151-062)?