Date   

Re: Printing Tek knobs

 

Scott - how much did you pay to have the knobs printed? My son has a 3D
printer and might be interested in printing them. I don't know if he has
grey filiment but he probably can get some.

houdatto@gmail.com

On Sun, Aug 23, 2020, 7:06 AM <scott@myhappydestiny.com> wrote:

Hey Dave,

Perhaps you found the small knobs already, but for others as well:

I just printed a bunch of the small knobs Tek # 366-0636-00 using this
design file:

Tektronix 2225 Oscilloscope control knob by faultedlogic on Thingiverse:
https://www.thingiverse.com/thing:4111558

I used treatstock.com to find a printing service, and printed in Resin.
If you find someone with gray resin, that's great. Mine were clear, but
will paint them.

Scott




Re: Printing Tek knobs

Scott Gilson
 

Hey Dave,

Perhaps you found the small knobs already, but for others as well:

I just printed a bunch of the small knobs Tek # 366-0636-00 using this design file:

Tektronix 2225 Oscilloscope control knob by faultedlogic on Thingiverse: https://www.thingiverse.com/thing:4111558

I used treatstock.com to find a printing service, and printed in Resin. If you find someone with gray resin, that's great. Mine were clear, but will paint them.

Scott


Re: Graticle lighting

Scott Gilson
 

Dave,

I have a 2225 and am adding graticule lighting. It never came with it.

I'll likely go with LEDs, and use the +5.2V supply (non-critical digital logic) with an appropriate current limiting resistor.

You can still find these original parts online:

The plastic graticule reflector is Tek part # 378-0877-02, and is used on the Tek 2232 scope. It's just the plastic piece with white reflective tape along one edge. You could add two diffused LEDs, or regular bulbs. Note there are only two holes for lights, and the center portion is a screw hole for mounting.

The illumination board and reflector assembly with bulbs is Tek # 671-1463-00 or 671-0795-00. This has the plastic piece above, the PCB with two bulbs, and the wire and a connector. Not sure of the voltage it uses, but they are wired in series.

You may want to add a brightness adjust knob on the rear of the scope.

Have fun!
Scott


Re: 2246A Power supply failure turning on / off

Giuli Lauto
 

I d check also the on off switch, very common failure.


Re: Tek 465 Turns on, No Dot, No Trace

 

On Sun, Jul 12, 2020 at 06:29 PM, Stephen wrote:


The crackling sounds and the weird smell (not a burning smell), appeared for
the the first time when I depressed the Beam Finder. Almost the same happened
when I cranked the Intensity.
I didn’t exactly see a “trace”, but rather a blurry and unfocused glow.
But at least, it was finally somehow alive.
The crackling sounds and the weird smell could well be arcing, producing ozone, which you smell. It indicates that the PDA voltage is there (output of HV multiplier). The ordinary HV of a few kV usually isn't enough to produce this effect.
But is this about a 465 (the thread's subject) or about your 475A? I'm confused but have to admit I haven't read it all. If it's about your 475A, I suggest starting a thread about that.

Raymond


Re: 184 Schematics

Eric
 

I am as well

On Sat, Aug 22, 2020, 4:44 PM Raymond Domp Frank <hewpatek@gmail.com> wrote:

On Sat, Aug 22, 2020 at 10:39 PM, Raymond Domp Frank wrote:


Why not put them on TekWiki and make them available to everybody?
If you prefer, send them to me and I'll put them there.
FWIW: TekWiki is *the* reference site and repository for all things
classic Tek.

Raymond




Re: 184 Schematics

 

On Sat, Aug 22, 2020 at 10:39 PM, Raymond Domp Frank wrote:


Why not put them on TekWiki and make them available to everybody?
If you prefer, send them to me and I'll put them there.
FWIW: TekWiki is *the* reference site and repository for all things classic Tek.

Raymond


Re: 184 Schematics

 

On Sat, Aug 22, 2020 at 10:24 PM, david wrote:


I have taken all the schematics for a 184 that were in two pieces and
assembled each schematic into a single document. All PDF files. If anyone is
interested I can put the in a ZIP file and Email them to you. Much easier to
understand circuits when looking at complete schematic.
Why not put them on TekWiki and make them available to everybody?
If you prefer, send them to me and I'll put them there.

Raymond


Re: 184 Schematics

Peter Brown
 

I’m interested

Peter

On Sat, Aug 22, 2020 at 2:24 PM david via groups.io <davide_us=
yahoo.com@groups.io> wrote:

I have taken all the schematics for a 184 that were in two pieces and
assembled each schematic into a single document. All PDF files. If anyone
is interested I can put the in a ZIP file and Email them to you. Much
easier to understand circuits when looking at complete schematic.

David








Re: 184 Schematics

Stephen
 

On Sat, Aug 22, 2020 at 09:24 AM, david wrote:


I have taken all the schematics for a 184 that were in two pieces and
assembled each schematic into a single document. All PDF files. If anyone is
interested I can put the in a ZIP file and Email them to you. Much easier to
understand circuits when looking at complete schematic.
David
I’m interested.


184 Schematics

david
 

I have taken all the schematics for a 184 that were in two pieces and assembled each schematic into a single document. All PDF files. If anyone is interested I can put the in a ZIP file and Email them to you. Much easier to understand circuits when looking at complete schematic.
David


Re: Tek 465 Sweep Start Calibration

david
 

Yeah, I checked and R1112 is 49.9 ohm, R 1111 is 562 ohm, ordered 196 ohm 1% 50ppm resistor, I can replace R1113 without removing A7 board.I will let you know if it works. Thanks for help.
David


Re: PS503A Mod FF Photos?

 

On Sat, Aug 22, 2020 at 06:44 PM, Colin Herbert wrote:


Wouldn't another power-supply be a possibility? Perhaps another PS503A or
something simpler, even. What if you want four power-sources - basically then
you do need another power-supply.
Sure, definitely, I wouldn't want to modify a PS503 *today*. In the past, I may have but reason 2 wouldn't have applied...
In the past, I would have liked to use fewer slots in my TM50x.

Raymond


Re: PS503A Mod FF Photos?

Stephen
 

This is exactly what I was gonna say.
Use another power supply... 🤷‍♂️


Re: PS503A Mod FF Photos?

Colin Herbert
 

Wouldn't another power-supply be a possibility? Perhaps another PS503A or something simpler, even. What if you want four power-sources - basically then you do need another power-supply.
Colin.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Raymond Domp Frank
Sent: 22 August 2020 17:41
To: TekScopes@groups.io
Subject: Re: [TekScopes] PS503A Mod FF Photos?

On Sat, Aug 22, 2020 at 04:17 PM, Stephen wrote:


May I ask why one would need to modify a PS503A?
Can’t you adjust and fine tune the 20V supply? That’s what i do on mine...
🤷‍♂️
A few reasons come to mind:
1. I may want to use the +/- 20V lines and supply my ECL logic as well (-5.2V nominal). It *is* a triple-voltage supply...
2. I may be using the +/- 20V lines, at the same time wanting to supply my Raspberry Pi 3B+, which doesn't like being fed less than 5.1V (or so).
3. I may want to supply my +/-15V OpAmp circuits while finding supply voltage limits for a connected 3.3V or (TTL) 5V circuit.
4. The reason I just stole from Colin: 5V at 1A from a TM504 (high power slot at the right) or the like.

Raymond


Re: PS503A Mod FF Photos?

 

On Sat, Aug 22, 2020 at 04:17 PM, Stephen wrote:


May I ask why one would need to modify a PS503A?
Can’t you adjust and fine tune the 20V supply? That’s what i do on mine...
🤷‍♂️
A few reasons come to mind:
1. I may want to use the +/- 20V lines and supply my ECL logic as well (-5.2V nominal). It *is* a triple-voltage supply...
2. I may be using the +/- 20V lines, at the same time wanting to supply my Raspberry Pi 3B+, which doesn't like being fed less than 5.1V (or so).
3. I may want to supply my +/-15V OpAmp circuits while finding supply voltage limits for a connected 3.3V or (TTL) 5V circuit.
4. The reason I just stole from Colin: 5V at 1A from a TM504 (high power slot at the right) or the like.

Raymond


Re: Oscilloscope Operator Training Kit - TNGTDS01

 

Thanks for the idea on generating glitches Harvey,
I have been working through the Tek TDS3 Training Manual using bench generators.  An HP 3314A function generator has proven helpful for generating irregular waveforms -- but I had to re-learn how to operate it.  Next I'm going to try a noise generator to see if the scope will capture single frames.
I built a 100 kHz? EICO 425k in my teens, graduated to a Dumont 2 MHz scope; then to an 18 MHz, 75-pound, 500-watt, Tek 513; followed by a 100 MHz 465; and finally to this 500 MHz (and quite sensitive) TDS3052B.  My head is still spinning from the myriad of features found in these "digital phosphor" scopes.
Bruce, KG6OJI


Re: FG 504 problems

 

On Sat, Aug 22, 2020 at 06:24 PM, Raymond Domp Frank wrote:


I just added a version of that document with bookmarks on the TekWiki page:

http://w140.com/tekwiki/wiki/Common_Design_Parts_Catalogs

I think the original version may be removed
At least in my Chrome browser, the bookmarks aren't shown online. Firefox and downloaded document are ok.

Raymond


Re: FG 504 problems

 

On Sat, Aug 22, 2020 at 03:09 PM, Stephen wrote:


I took the TEK parts number you provided and checked the reference from this
document:

http://w140.com/tek_xref_free.pdf

You should download it. It will make your life a lot easier.
I just added a version of that document with bookmarks on the TekWiki page:

http://w140.com/tekwiki/wiki/Common_Design_Parts_Catalogs

I think the original version may be removed

Raymond


Re: FG 504 problems

Stephen
 

On Sat, Aug 22, 2020 at 04:08 AM, Colin Herbert wrote:


Yes, the cost was involved in my decision. The one from the US was cheaper and
the postage wasn't too bad. Also, the French vendor wasn't someone I had dealt
with before, so I was a bit reticent to throw a significant amount of cash at
an unknown, especially considering the plethora of fakes and dodgy electronic
bits that can come up on eBay from time-to-time. I thought that the US vendor
was a safer bet on that account, too.
Understandable.

Incidentally, I am an idiot; I had a copy of the document that Stephen posted,
but I didn't look it up and use it!
Colin.
Since someone here sent me a link to this document, it’s almost become my bedside book! 😂😂😂

15781 - 15800 of 186495