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Anybody have a 147-0027-00 fan motor, or a suggestion?

Rolynn,

I have removed the side panels and cleaned out some of the dust. In
regard to the possible location of a couple of added fuses, in front
of the fan, I have a couple of selenium rectifier stacks and a thermal
cutout, so I am guessing that my unit is considerably older than
yours. So did you connect these in series with the silicon rectifiers

I oiled the fan and fired up the unit and it is obvious that my rotary
switches need cleaning. What is recommended for these open stacked
switches?

The trace on the CRT seemed kind of dim, so I may have considerable
more work to do.

Thanks, Matt



-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
ROLYNN PRECHTL K7DFW
Sent: Sunday, March 25, 2018 5:51 PM
To: [email protected]
Subject: Re: [TekScopes] Tektronix Type 575 Transistor Curve Tracer -
$75
(Syracuse)

The serial number of the unit I have is 004583, so I am assuming the
fuses are not there (I haven't taken off the bottom cover yet).

================================================================

The added fuses are located on top of the main chassis, immediately in
front of the fan motor, hanging off two ceramic strips containing the
silicon rectifiers of the main PS. You will see them by removing the
either the fan assembly or the left side panel.

They cannot be seen from the bottom or the right side as the xformer
is in the way.


Rolynn
Tek Bvtn and Sunset 1966-1971

I have contacted Tech Support to find out the cause and how to stop this if
possible.

Dennis Tillman W7PF



-----Original Message-----

From: [email protected] <mailto:[email protected]>
[mailto:[email protected]] On Behalf Of Dave Daniel

Sent: Saturday, March 31, 2018 11:04 AM

To: [email protected] <mailto:[email protected]>

Subject: Re: [TekScopes] c-clip pliers



See? What's going on?



On 3/31/2018 12:03 PM, Dave Daniel wrote:

Why are my posts coming through twice? Does anyone know? This seems to

have started happening recently although I have changed nothing wrt my

email client set-up.

DaveD

-----Original Message-----

From: [email protected] <mailto:[email protected]>
[mailto:[email protected]] On Behalf Of Dave Daniel

Sent: Saturday, March 31, 2018 11:04 AM

To: [email protected] <mailto:[email protected]>

Subject: Re: [TekScopes] c-clip pliers



Why are my posts coming through twice? Does anyone know? This seems to have
started happening recently although I have changed nothing wrt my email
client set-up.



DaveD

Rolynn,

I have removed the side panels and cleaned out some of the dust. In regard
to the possible location of a couple of added fuses, in front of the fan, I
have a couple of selenium rectifier stacks and a thermal cutout, so I am
guessing that my unit is considerably older than yours. So did you connect
these in series with the silicon rectifiers that are in your unit?

I oiled the fan and fired up the unit and it is obvious that my rotary
switches need cleaning. What is recommended for these open stacked
switches?

The trace on the CRT seemed kind of dim, so I may have considerable more
work to do.

Thanks, Matt



-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of ROLYNN
PRECHTL K7DFW
Sent: Sunday, March 25, 2018 5:51 PM
To: [email protected]
Subject: Re: [TekScopes] Tektronix Type 575 Transistor Curve Tracer - $75
(Syracuse)

The serial number of the unit I have is 004583, so I am assuming the fuses
are not there (I haven't taken off the bottom cover yet).

================================================================

The added fuses are located on top of the main chassis, immediately in front
of the fan motor, hanging off two ceramic strips containing the silicon
rectifiers of the main PS. You will see them by removing the either the fan
assembly or the left side panel.

They cannot be seen from the bottom or the right side as the xformer is in
the way.


Rolynn
Tek Bvtn and Sunset 1966-1971

I'm looking for a good tool to remove the c-clip from the retention shaft from letter-series plugins.

For example



I can't tell if the needle nose is small enough to get into the tiny c-clip holes. I bought a tool but indeed the pins don't fit into the holes, and in any case, the jaws don't close small enough to even hook into both holes.

What do you use?

Why are my posts coming through twice? Does anyone know? This seems to

have started happening recently although I have changed nothing wrt my

email client set-up.

DaveD

I'm looking for a good tool to remove the c-clip from the retention shaft from letter-series plugins.

For example



I can't tell if the needle nose is small enough to get into the tiny c-clip holes. I bought a tool but indeed the pins don't fit into the holes, and in any case, the jaws don't close small enough to even hook into both holes.

What do you use?

Phil et all
I found a later change page dealing with the fan wiring ( non trivial change) and have uploaded the change page to the file section. hopefully this matches your unit. The change page is in a FOLDER called "453 Late Model Fan"

/g/TekScopes/files/453%20LATE%20MODE;%20FAN

-DC
manuals@...

On 3/30/2018 9:17 PM, Phillip Potter wrote:

Hi all,

The fan on my scope was very noisy, so I pulled the back apart and got the fan apart from the shroud, only to find that the wiring is soldered in with no way to get the fan out to work on it.??? So.... I cut the wires. Now, in the process of returning it to the scope, I've been reconnecting the wires, BUT in my clumsy style I managed to pull the shortest of the four (the black one) out of the back while attempting to strip it!??? Grrrr.

So, now I can't tell where the wire connects to the scope!??? I have three different schematics (manuals) and NONE of the three show a fan with FOUR wires!!!??? Only three...... What the heck?!?

Is there anyone here who can shed some light on what I should do now???? That is... after I shoot myself!

Thanks in advance for anything you can suggest.

Phil

Why are my posts coming through twice? Does anyone know? This seems to have started happening recently although I have changed nothing wrt my email client set-up.

DaveD

On 3/31/2018 12:01 PM, Dave Daniel wrote:

Awhile back, I bought a set of circlip pliers made by Vise-Grip which came with several different sized tips. I think I bought them from Home Depot, but I'm not sure.

Here is a link to the Irwin website that shows them:



They come with four tips, three of which have the same diameter pins but at different angles. The fourth tip set has smaller diameter tips.

I saw a webpage at Wal-Mart that shows these, and you can probably find them at your local hardware store or building center.

They've served me just fine; I don't recall not being able to remove a circlip since I purchased the pliers.

DaveD

On 3/31/2018 11:42 AM, snapdiode via Groups.Io wrote:

I'm looking for a good tool to remove the c-clip from the retention shaft from letter-series plugins.

For example



I can't tell if the needle nose is small enough to get into the tiny c-clip holes. I bought a tool but indeed the pins don't fit into the holes, and in any case, the jaws don't close small enough to even hook into both holes.

What do you use?

Awhile back, I bought a set of circlip pliers made by Vise-Grip which came with several different sized tips. I think I bought them from Home Depot, but I'm not sure.

Here is a link to the Irwin website that shows them:



They come with four tips, three of which have the same diameter pins but at different angles. The fourth tip set has smaller diameter tips.

I saw a webpage at Wal-Mart that shows these, and you can probably find them at your local hardware store or building center.

They've served me just fine; I don't recall not being able to remove a circlip since I purchased the pliers.

DaveD

On 3/31/2018 11:42 AM, snapdiode via Groups.Io wrote:

I'm looking for a good tool to remove the c-clip from the retention shaft from letter-series plugins.

For example



I can't tell if the needle nose is small enough to get into the tiny c-clip holes. I bought a tool but indeed the pins don't fit into the holes, and in any case, the jaws don't close small enough to even hook into both holes.

What do you use?

Funny, last night i needed to remove c-clips from a hp331a to lube the gear shafts. I found the same thing,my pliers were too big. I ended up using 2 picks from a pick and hook set.

I'm looking for a good tool to remove the c-clip from the retention shaft from letter-series plugins.

For example



I can't tell if the needle nose is small enough to get into the tiny c-clip holes. I bought a tool but indeed the pins don't fit into the holes, and in any case, the jaws don't close small enough to even hook into both holes.

What do you use?

Hi all,

The fan on my scope was very noisy, so I pulled the back apart and got the fan apart from the shroud, only to find that the wiring is soldered in with no way to get the fan out to work on it.? So.... I cut the wires. Now, in the process of returning it to the scope, I've been reconnecting the wires, BUT in my clumsy style I managed to pull the shortest of the four (the black one) out of the back while attempting to strip it!? Grrrr.

So, now I can't tell where the wire connects to the scope!? I have three different schematics (manuals) and NONE of the three show a fan with FOUR wires!!!? Only three...... What the heck?!?

Is there anyone here who can shed some light on what I should do now?? That is... after I shoot myself!

Thanks in advance for anything you can suggest.

Phil

On 31 Mar 2018, at 03:30, lop pol via Groups.Io <the_infinite_penguin@...> wrote:

I have never looked at the fans on mine so I cant help with that. But... FYI the 453's sound like tiny jet planes.

There is a starter capacitor involved