开云体育

On 2/1/2021 21:33, Torch wrote:

Well here it is in all it's glory:



There's a hard stone-like white non-conductive core coated with a thin resistive black layer underneath the tan paint. A metal cap and lead on either end completes the assembly. And by thin, I mean I think the outer layer of tan paint was thicker.

So, what's the verdict: is this a carbon composite or carbon film? I think it's carbon film.

On 2/1/2021 21:30, Larry McDavid wrote:

However, I was wrong earlier saying I had not seen a tiny-size Torx. On checking, I actually have a Wiha Torx set from T1 through T10.

So, I wonder if there are small set screws with a Torx recess. Has anyone actually encountered such a set screw?

Larry

On 2/1/2021 7:19 PM, Dave Seiter wrote:

? I've *never* seen a Tek knob with a torx set screw.-Dave
???? On Monday, February 1, 2021, 12:29:01 PM PST, Joseph Orgnero <josepho@...> wrote:
? ? In my experience Tek uses only Torx screws on their equipment, trying to use
Allen or Bristol wrenches is asking for trouble.
Jose Orgnero VE7LBI

-----Original Message-----
From: Jeff Kruth via groups.io
Sent: Monday, February 01, 2021 11:56 AM
To: [email protected]
Subject: Re: [TekScopes] Extracting a buggered knob grubscrew

While I am sure there are many tips that others have, I found a thin hot
soldering iron pressed into the iron screw socket head will sometimes add
enough heat(expansion) to get things going. I have also filed cheap jewelers
screwdrivers into an appropriate sized chisel point and, using friction fit,
tapped them into the end of the reamed out set screw with a small hammer.
This can then be grasped with a small pair of vice grips and the screw may
give.YMMVJeff Kruth In a message dated 2/1/2021 2:46:57 PM Eastern Standard
Time, snapdiode@... writes:
They are typically 1/20" or 0.050" keys. Sometimes it's Bristol drive but if
someone forced a hex key in there it's probably not a Bristol drive anymore.

Unfortunately I have found no way to extract a stuck set screw of that size.
You might try a 1.3mm key, sometimes they really are 1.3 and not 1.27 so you
get a bit more grip. I don't know, seems random.

On 2/1/2021 7:19 PM, Dave Seiter wrote:

I've *never* seen a Tek knob with a torx set screw.-Dave
On Monday, February 1, 2021, 12:29:01 PM PST, Joseph Orgnero <josepho@...> wrote:
In my experience Tek uses only Torx screws on their equipment, trying to use
Allen or Bristol wrenches is asking for trouble.
Jose Orgnero VE7LBI
-----Original Message-----
From: Jeff Kruth via groups.io
Sent: Monday, February 01, 2021 11:56 AM
To: [email protected]
Subject: Re: [TekScopes] Extracting a buggered knob grubscrew
While I am sure there are many tips that others have, I found a thin hot
soldering iron pressed into the iron screw socket head will sometimes add
enough heat(expansion) to get things going. I have also filed cheap jewelers
screwdrivers into an appropriate sized chisel point and, using friction fit,
tapped them into the end of the reamed out set screw with a small hammer.
This can then be grasped with a small pair of vice grips and the screw may
give.YMMVJeff Kruth In a message dated 2/1/2021 2:46:57 PM Eastern Standard
Time, snapdiode@... writes:
They are typically 1/20" or 0.050" keys. Sometimes it's Bristol drive but if
someone forced a hex key in there it's probably not a Bristol drive anymore.
Unfortunately I have found no way to extract a stuck set screw of that size.
You might try a 1.3mm key, sometimes they really are 1.3 and not 1.27 so you
get a bit more grip. I don't know, seems random.

On 2/1/2021 7:19 PM, Dave Seiter wrote:

I've *never* seen a Tek knob with a torx set screw.-Dave
On Monday, February 1, 2021, 12:29:01 PM PST, Joseph Orgnero <josepho@...> wrote:
In my experience Tek uses only Torx screws on their equipment, trying to use
Allen or Bristol wrenches is asking for trouble.
Jose Orgnero VE7LBI
-----Original Message-----
From: Jeff Kruth via groups.io
Sent: Monday, February 01, 2021 11:56 AM
To: [email protected]
Subject: Re: [TekScopes] Extracting a buggered knob grubscrew
While I am sure there are many tips that others have, I found a thin hot
soldering iron pressed into the iron screw socket head will sometimes add
enough heat(expansion) to get things going. I have also filed cheap jewelers
screwdrivers into an appropriate sized chisel point and, using friction fit,
tapped them into the end of the reamed out set screw with a small hammer.
This can then be grasped with a small pair of vice grips and the screw may
give.YMMVJeff Kruth In a message dated 2/1/2021 2:46:57 PM Eastern Standard
Time, snapdiode@... writes:
They are typically 1/20" or 0.050" keys. Sometimes it's Bristol drive but if
someone forced a hex key in there it's probably not a Bristol drive anymore.
Unfortunately I have found no way to extract a stuck set screw of that size.
You might try a 1.3mm key, sometimes they really are 1.3 and not 1.27 so you
get a bit more grip. I don't know, seems random.

On Monday, February 1, 2021, 12:29:01 PM PST, Joseph Orgnero <josepho@...> wrote:

In my experience Tek uses only Torx screws on their equipment, trying to use
Allen or Bristol wrenches is asking for trouble.
Jose Orgnero VE7LBI

-----Original Message-----
From: Jeff Kruth via groups.io
Sent: Monday, February 01, 2021 11:56 AM
To: [email protected]
Subject: Re: [TekScopes] Extracting a buggered knob grubscrew

While I am sure there are many tips that others have, I found a thin hot
soldering iron pressed into the iron screw socket head will sometimes add
enough heat(expansion) to get things going. I have also filed cheap jewelers
screwdrivers into an appropriate sized chisel point and, using friction fit,
tapped them into the end of the reamed out set screw with a small hammer.
This can then be grasped with a small pair of vice grips and the screw may
give.YMMVJeff Kruth In a message dated 2/1/2021 2:46:57 PM Eastern Standard
Time, snapdiode@... writes:
They are typically 1/20" or 0.050" keys. Sometimes it's Bristol drive but if
someone forced a hex key in there it's probably not a Bristol drive anymore.

Unfortunately I have found no way to extract a stuck set screw of that size.
You might try a 1.3mm key, sometimes they really are 1.3 and not 1.27 so you
get a bit more grip. I don't know, seems random.












--
Jose Orgnero

On Monday, February 1, 2021, 05:30:04 PM PST, greenboxmaven via groups.io <ka2ivy@...> wrote:

? Because there are two grubscrews, remove the good one that did loosen,
apply penetrant to the stuck one, both on it and also down the hole of
the other one. Find a good high strength bolt about an inch long of the
same thread as the good grubscrew, install it, and tighten it sensibly-
not too much!? Loosen and tighten it several times to "work" the
bushing inside the knob. Take it easy, the bushing does flex, and that
can help work things loose. I have done this many times with great
results. Grub srews have a cone shaped recess on their tip to dig into
the shaft. Working that loose is key to getting the screw out.

? ? ? Bruce Gentry, KA2IVY


On 2/1/21 19:14, Michael A. Terrell wrote:

Torx was developed in 1967 and patented in 1971. Bristol was in use during
WW-II

On Mon, Feb 1, 2021 at 5:33 PM snapdiode via groups.io <snapdiode=
[email protected]> wrote:

In the 500 series, there are no Torx screws anywhere AFAIK, rather they
are Pozidriv.

On 2/1/21 19:14, Michael A. Terrell wrote:

Torx was developed in 1967 and patented in 1971. Bristol was in use during
WW-II

On Mon, Feb 1, 2021 at 5:33 PM snapdiode via groups.io <snapdiode=
[email protected]> wrote:

In the 500 series, there are no Torx screws anywhere AFAIK, rather they
are Pozidriv.

On Mon, Feb 1, 2021 at 02:45 PM, Sparky99 wrote:

Hi everyone, I've got a 7603 with no trace and an odd - to me at least -
fault. The - ve rails are just under the - 15 and - 50v specified. The +ve
rails on the other hand are at +18, +75 and +179v rather than the 15, 50 and
130v specified.
I'm getting a very light burning smell, but this is faint and it might just be
dust - or of course the tail end of an already well fried component.
Any thoughts on where I should investigate to find the cause of the increased
voltage, and also whether the voltage going high in this way might have
toasted other components?

On Mon, Feb 1, 2021 at 2:33 PM <keith@...> wrote:

Need to remove the horizontal control knob on my 576 so I can remove the
board to get at the display selector board. One of the grubscrews undoes
easily enough, but the other appears to have its hex slot stripped. A
1/16th allen key just rotates in the slot.

Any tips on how this could be removed? I don't have a screw extractor
small enough (I presume the grubscrew is 1/8th ?).

On Mon, Feb 1, 2021, 2:33 PM <keith@...> wrote:

Need to remove the horizontal control knob on my 576 so I can remove the
board to get at the display selector board. One of the grubscrews undoes
easily enough, but the other appears to have its hex slot stripped. A
1/16th allen key just rotates in the slot.

Any tips on how this could be removed? I don't have a screw extractor
small enough (I presume the grubscrew is 1/8th ?).